Hot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels

Part 4 of this document, in addition to Part 1, specifies requirements for flat and long products of hot rolled weldable fine grain structural steels in the thermomechanical rolled condition in the grades and qualities given in Tables 2 to 4 (chemical composition) and Tables 5 to 7 (mechanical properties) in thickness < 120 mm for flat products and in thickness < 150 mm for long products.
In addition to EN 10025-1 the steels specified in this document are especially intended for use in heavily loaded parts of welded structures such as, bridges, flood gates, storage tanks, water supply tanks, etc., for service at ambient and low temperatures.

Warmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete Feinkornbaustähle

Dieses Dokumentes legt die technischen Lieferbedingungen für Flach- und Langerzeugnisse aus schweißgeeigneten Feinkornbaustählen im thermomechanisch gewalzten Lieferzustand in den Sorten und Gütegruppen nach den Tabellen 1 bis 3 (chemische Zusammensetzung) und den Tabellen 4 bis 6 (mechanische Eigenschaften) in Dicken ≤ 150 mm fest.
Die in diesem Dokument erfassten Stähle sind vorwiegend für die Verwendung in hochbeanspruchten geschweißten Bauteilen, wie z. B. Brücken, Schleusentoren, Lagerbehältern, Wassertanks usw. bei Umgebungstemperatur und niedrigen Temperaturen bestimmt.

Produits laminés à chaud en aciers de construction - Partie 4 : Conditions techniques de livraison pour les aciers de construction soudable à grains fins obtenus par laminage thermomécanique

Le présent document spécifie les conditions techniques de livraison des produits plats et longs en aciers de construction soudables à grains fins à l'état laminé thermomécaniquement, dans les nuances et qualités données dans les Tableaux 1 à 3 (composition chimique) et les Tableaux 4 à 6 (caractéristiques mécaniques), d'épaisseur ≤ 150 mm.
Les aciers spécifiés dans le présent document sont destinés en particulier à l'emploi dans les éléments hautement sollicités des constructions soudées telles que ponts, vannes de décharge, réservoirs de stockage, réservoirs d'approvisionnement en eau, etc., pour service à température ambiante et à basses températures.

Vroče valjani izdelki iz konstrukcijskih jekel - 4. del: Tehnični dobavni pogoji za termomehansko obdelana valjana variva drobnozrnata konstrukcijska jekla

4. del tega dokumenta poleg 1. dela določa zahteve za ploske in dolge izdelke iz vroče valjanih variv drobnozrnatega konstrukcijskega jekla v termomehaničnem valjanem stanju v razredih ter z lastnostmi iz preglednic od 2 do 4 (kemična sestava) in preglednic od 5 do 7 (mehanske lastnosti) debeline < 120 mm za ploske izdelke ter debeline < 150 mm za dolge izdelke.
Poleg namena uporabe iz standarda EN 10025-1 so jekla v tem dokumentu namenjena posebej za uporabo v močno obremenjenih delih varjenih konstrukcij, kot so mostovi, zapornice, shranjevalni rezervoarji, rezervoarji za oskrbo z vodo itd., ki se uporabljajo pri temperaturi okolice in nizki temperaturi.

General Information

Status
Published
Public Enquiry End Date
05-Sep-2018
Publication Date
02-Sep-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
21-Aug-2019
Due Date
26-Oct-2019
Completion Date
03-Sep-2019

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 10025-4:2019
01-oktober-2019
Nadomešča:
SIST EN 10025-4:2004

Vroče valjani izdelki iz konstrukcijskih jekel - 4. del: Tehnični dobavni pogoji za

termomehansko obdelana valjana variva drobnozrnata konstrukcijska jekla

Hot rolled products of structural steels - Part 4: Technical delivery conditions for

thermomechanical rolled weldable fine grain structural steels

Warmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für

thermomechanisch gewalzte schweißgeeignete Feinkornbaustähle

Produits laminés à chaud en aciers de construction - Partie 4 : Conditions techniques de

livraison pour les aciers de construction soudable à grains fins obtenus par laminage

thermomécanique
Ta slovenski standard je istoveten z: EN 10025-4:2019
ICS:
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
SIST EN 10025-4:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 10025-4:2019
---------------------- Page: 2 ----------------------
SIST EN 10025-4:2019
EN 10025-4
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2019
EUROPÄISCHE NORM
ICS 77.140.10; 77.140.50 Supersedes EN 10025-4:2004
English Version
Hot rolled products of structural steels - Part 4: Technical
delivery conditions for thermomechanical rolled weldable
fine grain structural steels

Produits laminés à chaud en aciers de construction - Warmgewalzte Erzeugnisse aus Baustählen - Teil 4:

Partie 4 : Conditions techniques de livraison pour les Technische Lieferbedingungen für thermomechanisch

aciers de construction soudable à grains fins obtenus gewalzte schweißgeeignete Feinkornbaustähle

par laminage thermomécanique
This European Standard was approved by CEN on 16 June 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10025-4:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 10025-4:2019
EN 10025-4:2019 (E)
Contents Page

European foreword ...................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 8

4 Classification and designation ................................................................................................................... 8

4.1 Classification ..................................................................................................................................................... 8

4.1.1 Main quality classes ....................................................................................................................................... 8

4.1.2 Grades and qualities ...................................................................................................................................... 8

4.2 Designation ....................................................................................................................................................... 9

5 Information to be supplied by the purchaser ....................................................................................... 9

5.1 Mandatory information ................................................................................................................................ 9

5.2 Options ................................................................................................................................................................ 9

6 Manufacturing process ................................................................................................................................. 9

6.1 Steel making process ..................................................................................................................................... 9

6.2 Deoxidation and grain structure ............................................................................................................. 10

6.3 Delivery conditions ...................................................................................................................................... 10

7 Requirements ................................................................................................................................................. 10

7.1 General .............................................................................................................................................................. 10

7.2 Chemical composition ................................................................................................................................. 10

7.3 Mechanical properties ................................................................................................................................ 11

7.3.1 General .............................................................................................................................................................. 11

7.3.2 Impact properties ......................................................................................................................................... 11

7.3.3 Improved deformation properties perpendicular to the surface ............................................... 11

7.4 Technological properties ........................................................................................................................... 12

7.4.1 Weldability ...................................................................................................................................................... 12

7.4.2 Formability and flame straightening ..................................................................................................... 12

7.4.3 Hot-dip zinc-coating ..................................................................................................................................... 13

7.5 Surface properties ........................................................................................................................................ 13

7.5.1 Strip .................................................................................................................................................................... 13

7.5.2 Plates and wide flats .................................................................................................................................... 13

7.5.3 Sections ............................................................................................................................................................. 13

7.5.4 Bars and rods .................................................................................................................................................. 13

7.6 Internal soundness ....................................................................................................................................... 13

7.7 Dimensions, tolerances on dimensions and shape, mass ............................................................... 14

8 Inspection ........................................................................................................................................................ 14

8.1 Type of inspection and inspection document ..................................................................................... 14

8.2 Content of inspection document .............................................................................................................. 14

8.3 Tests to be carried out ................................................................................................................................ 15

9 Frequency of testing and preparation of samples and test pieces .............................................. 15

9.1 Frequency of testing..................................................................................................................................... 15

9.1.1 Chemical analysis .......................................................................................................................................... 15

9.1.2 Mechanical tests ............................................................................................................................................ 15

9.2 Preparation of samples and test pieces ................................................................................................ 15

9.2.1 Selection and preparation of samples for chemical analysis ........................................................ 15

9.2.2 Location of samples and orientation of test pieces for mechanical tests ................................. 16

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SIST EN 10025-4:2019
EN 10025-4:2019 (E)

9.2.3 Preparation of test pieces for mechanical tests ................................................................................ 16

9.3 Identification of samples and test pieces ............................................................................................. 17

10 Test methods .................................................................................................................................................. 17

10.1 Chemical analysis ......................................................................................................................................... 17

10.2 Mechanical tests ............................................................................................................................................ 17

10.2.1 Tensile test ...................................................................................................................................................... 17

10.2.2 Impact test ....................................................................................................................................................... 17

10.3 Ultrasonic testing .......................................................................................................................................... 18

10.4 Retests .............................................................................................................................................................. 18

11 Marking, labelling, packaging .................................................................................................................. 18

12 Complaints ...................................................................................................................................................... 18

13 Options ............................................................................................................................................................. 19

Annex A (normative) Location of samples and test pieces ........................................................................... 25

Annex B (informative) List of Options of EN 10025-2 to −6 ......................................................................... 28

Bibliography ................................................................................................................................................................. 30

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SIST EN 10025-4:2019
EN 10025-4:2019 (E)
European foreword
This document (EN 10025-4:2019) has been prepared by Technical Committee

CEN/TC 459/SC 3 “Structural steels other than reinforcements”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by February 2020 and conflicting national standards shall be

withdrawn at the latest by February 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document will supersede EN 10025-4:2004

This document consists of the following parts, under the general title Hot rolled products of structural steels:

— Part 1: General technical delivery conditions
— Part 2: Technical delivery conditions for non-alloy structural steels

— Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural

steels

— Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels

— Part 5: Technical delivery conditions for structural steels with improved atmospheric corrosion resistance

— Part 6: Technical delivery conditions for flat products of high yield strength structural steels in the

quenched and tempered condition

For a short transition period there will be a coexistence of EN 10025-1:2004 with EN 10025-2:2019 to

EN 10025-6:2019, since the new EN 10025-1 has to fulfil the requirements of the CPR and will therefore be

published later. For this short transition period up-to-the publication of the next edition of part 1 the

following is to be taken into account for EN 10025-1:2004:

a) all dated and undated references to EN 10025-1:2004 to EN 10025-6:2004 are unchanged to this

version with following exception: In 9.2.2.1 the references are 8.3.1 and 8.3.2 instead of 8.4.1 and 8.4.2,

b) Clauses 5, 12 and 13 of EN 10025-1:2004 are no longer relevant.
The main changes with respect to the previous edition are listed below:

a) part 4 is now a stand-alone standard for technical delivery conditions including the preparation of

samples and test pieces, the test methods, the marking, labelling and packaging and the drawings;

b) for applications under the CPR this document and part 1 are used together;
c) requirements for elements not definded were added to 7.2.1 and 7.2.2;

d) Option 33 was added, Option 3 was renumbered to Option 24 and Option 9 was deleted;

e) Si-content in 7.2.4 was changed;
f) 7.4.3 concerning hot-dip zinc coating was modified;
g) key to Figure A.1 was updated;
---------------------- Page: 6 ----------------------
SIST EN 10025-4:2019
EN 10025-4:2019 (E)
h) steel grade S500M was added;
i) Annex B concerning the corresponding EURONORMS deleted;
j) references were updated and document editorial revised.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,

Czech Republic, Denmark, Estonia, Finland, Republic of North Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

---------------------- Page: 7 ----------------------
SIST EN 10025-4:2019
EN 10025-4:2019 (E)
1 Scope

This document specifies technical delivery conditions for flat and long products of hot rolled weldable fine

grain structural steels in the thermomechanical rolled condition in the grades and qualities given in Tables

1 to 3 (chemical composition) and Tables 4 to 6 (mechanical properties) in thickness ≤ 150 mm.

The steels specified in this document are especially intended for use in heavily loaded parts of welded

structures such as, bridges, flood gates, storage tanks, water supply tanks, etc., for service at ambient and

low temperatures.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN 1011-2, Welding — Recommendations for welding of metallic materials — Part 2: Arc welding of ferritic

steels
EN 10017, Steel rod for drawing and/or cold rolling — Dimensions and tolerances
EN 10020:2000, Definition and classification of grades of steel
EN 10021, General technical delivery conditions for steel products

EN 10024, Hot rolled taper flange I sections — Tolerances on shape and dimensions

EN 10025-1, Hot rolled products of structural steels — Part 1: General technical delivery conditions

EN 10027-1, Designation systems for steels — Part 1: Steel names
EN 10027-2, Designation systems for steels — Part 2: Numerical system

EN 10029, Hot-rolled steel plates 3 mm thick or above — Tolerances on dimensions and shape

EN 10034, Structural steel I and H sections — Tolerances on shape and dimensions
EN 10048, Hot rolled narrow steel strip — Tolerances on dimensions and shape

EN 10051, Continuously hot-rolled strip and plate/sheet cut from wide strip of non-alloy and alloy steels —

Tolerances on dimensions and shape

EN 10055, Hot rolled steel equal flange tees with radiused root and toes — Dimensions and tolerances on

shape and dimensions
EN 10056-1, Structural steel equal and unequal leg angles — Part 1: Dimensions

EN 10056-2, Structural steel equal and unequal leg angles — Part 2: Tolerances on shape and dimensions

EN 10058, Hot rolled flat steel bars and steel wide flats for general purposes — Dimensions and tolerances on

shape and dimensions

EN 10059, Hot rolled square steel bars for general purposes — Dimensions and tolerances on shape and

dimensions
---------------------- Page: 8 ----------------------
SIST EN 10025-4:2019
EN 10025-4:2019 (E)

EN 10060, Hot rolled round steel bars for general purposes — Dimensions and tolerances on shape and

dimensions

EN 10061, Hot rolled hexagon steel bars for general purposes — Dimensions and tolerances on shape and

dimensions

EN 10067, Hot rolled bulb flats — Dimensions and tolerances on shape, dimensions and mass

EN 10079, Definition of steel products

EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection method)

EN 10163-1, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections —

Part 1: General requirements

EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections —

Part 2: Plate and wide flats

EN 10163-3, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections —

Part 3: Sections

EN 10164, Steel products with improved deformation properties perpendicular to the surface of the product

— Technical delivery conditions

EN 10168, Steel products — Inspection documents — List of information and description

EN 10204, Metallic products — Types of inspection documents
EN 10279, Hot rolled steel channels — Tolerances on shape, dimensions and mass

EN 10306, Iron and steel — Ultrasonic testing of H beams with parallel flanges and IPE beams

EN 10308, Non destructive testing — Ultrasonic testing of steel bars

EN 10315, Routine method for analysis of high alloy steel by X-ray Fluorescence Spectrometry (XRF) by using

a near by technique

CR 10320, Optical emission analysis of low alloy steels (routine method) — Method for determination of C, Si,

S, P, Mn, Cr, Ni and Cu
CEN/TR 10347, Guidance for forming of structural steels in processing

EN 10363, Continuously hot-rolled patterned steel strip and plate/sheet cut from wide strip — Tolerances on

dimensions and shape
EN 10365, Hot rolled steel channels, I and H sections — Dimensions and masses

EN ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method (ISO 148-1)

EN ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical

testing (ISO 377)

EN ISO 2566-1, Steel — Conversion of elongation values — Part 1: Carbon and low alloy steels (ISO 2566-1)

EN ISO 6892-1:2016, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

(ISO 6892-1:2016)
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SIST EN 10025-4:2019
EN 10025-4:2019 (E)
EN ISO 9443, Surface quality classes for hot-rolled bars and wire rod (ISO 9443)

EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical

composition (ISO 14284)

EN ISO 14713-2:2009, Zinc coatings — Guidelines and recommendations for the protection against corrosion

of iron and steel in structures — Part 2: Hot dip galvanizing (ISO 14713-2:2009)

EN ISO 15350, Steel and iron — Determination of total carbon and sulfur content — Infrared absorption

method after combustion in an induction furnace (routine method) (ISO 15350)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 10079 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
thermomechanical rolling

rolling process in which the final deformation is carried out in a certain temperature range leading to a

material condition with certain properties which cannot be achieved or repeated by heat treatment alone

Note 1 to entry: Thermomechanical rolling can include processes with an increasing cooling rate with or without

tempering including self-tempering but excluding direct quenching and quenching and tempering.

Note 2 to entry: In some publications the word TMCP (Thermomechanical Control Process) is also used.

3.2
fine grain steels

steels with fine grain structure with an equivalent index of ferritic grain size ≥ 6

Note 1 to entry: For the determination of grain sizes see EN ISO 643.
4 Classification and designation
4.1 Classification
4.1.1 Main quality classes

All steel grades specified in this document shall be classified as alloy special steels according to EN 10020

except grade S275 which is a non-alloy quality steel.
4.1.2 Grades and qualities

This document specifies five steel grades S275, S355, S420, S460 and S500. All steel grades may be supplied

in the following qualities as specified at the time of the order:

— with specified minimum values of impact energy at temperatures not lower than −20 °C, designated as

— with specified minimum values of impact energy at temperatures not lower than −50 °C, designated as

ML.
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SIST EN 10025-4:2019
EN 10025-4:2019 (E)
4.2 Designation

4.2.1 For the steel grades covered by this document the steel names shall be allocated in accordance with

EN 10027-1; the steel numbers shall be allocated in accordance with EN 10027-2.
4.2.2 The designation shall consist of:
— number of this document (EN 10025-4);
— steel name or the steel number; the steel name consisting of:
— symbol S (for structural steel);

— indication of the minimum specified yield strength for thickness ≤ 16 mm expressed in MPa;

— delivery condition M;

— capital letter L for the quality with specified minimum values of impact energy at temperatures not

lower than −50 °C.

EXAMPLE Thermomechanical rolled structural steel (S) with a specified minimum yield strength at room

temperature of 355 MPa and with a specified minimum impact energy at −50 C:
EN 10025-4 - S355ML
EN 10025-4 - 1.8834
5 Information to be supplied by the purchaser
5.1 Mandatory information

The following information shall be supplied by the purchaser at the time of the order:

a) quantity to be delivered;

b) product form and the number of the standard for dimensions and tolerances(see 2.2);

c) nominal dimensions and tolerances on dimensions and shape (see 7.7.1);
d) steel designation (see 4.2.2);

e) additional requirements of inspection and testing and all required options (see 5.2 and Clause 13);

f) type of inspection document according to EN 10204 (see 8.1).
5.2 Options

A number of options are specified in Clause 13. In the event that the purchaser does not indicate his wish to

implement any of these options, the supplier shall supply in accordance with the basic specification, see 5.1

a) to d) and f).
6 Manufacturing process
6.1 Steel making process

The steel making process is at the discretion of the manufacturer with the exclusion of the open hearth

(Siemens-Martin) process.
See Option 1, Clause 13 (details of manufacturing process).
---------------------- Page: 11 ----------------------
SIST EN 10025-4:2019
EN 10025-4:2019 (E)
6.2 Deoxidation and grain structure
Steels of EN 10025-4 shall
— be fully killed;
— have a fine grain structure;

— contain nitrogen binding elements in amounts sufficient to bind the available nitrogen (for example

min. 0,020 % total aluminium). The usual guideline is a minimum aluminium to nitrogen ratio of 2:1,

when no other nitrogen binding elements are present. Such other elements and their content (% mass)

shall be reported in the inspection document (see Table 1).
6.3 Delivery conditions

The products shall be supplied in the thermomechanical rolled condition as defined in Clause 3.

7 Requirements
7.1 General

The requirements in 7.2 and 7.3 apply for sampling, preparation of test pieces and testing specified in

Clauses 9 and 10.
7.2 Chemical composition

7.2.1 The chemical composition determined by heat analysis shall comply with the specified values of

Table 1.

For elements not defined in the table for the chemical composition for heat analysis, limit values of Table 1

of EN 10020:2000 shall apply as maximum values.

7.2.2 The limits applicable for the product analysis are given in Table 2. The product analysis shall be

carried out when specified at the time of the order.
See Option 2, Clause 13 (product analysis).

For elements not defined in tables for the chemical composition for product analysis, limit values of Table 1

of EN 10020:2000 shall apply as maximum values.

7.2.3 The maximum carbon equivalent values based on the heat analysis, given in Table 3 shall apply.

For determining the carbon equivalent value the following IIW (International Institute of Welding) formula

shall be used:
Cr++Mo V Ni+ Cu
CEV=C++ +
6 5 15

7.2.4 When products are supplied with a control on Si e.g. for hot-dip zinc-coating so that there could be a

need to increase the content of other elements like C and Mn to achieve the required tensile properties, the

maximum carbon equivalent values of Table 3 shall be increased as follows:
— for Si ≤ 0,04 %, increase the value of the CEV by 0,02;
— for Si ≤ 0,25 %, increase the value of the CEV by 0,01.
---------------------- Page: 12 ----------------------
SIST EN 10025-4:2019
EN 10025-4:2019 (E)
7.3 Mechanical properties
7.3.1 General

7.3.1.1 Under the inspection and testing conditions as specified in Clauses 8, 9 and 10 and in the

delivery condition as specified in 6.3 the mechanical properties shall comply with the values given in

Tables 4 to 6.

Stress relieving at more than 580 °C or for over 1 h may lead to a deterioration of the mechanical properties

of the steel grades. If the purchaser intends to stress relief the products at higher temperatures or for

longer times than mentioned above, the minimum values of the mechanical properties after such a

treatment should be agreed upon at the time of the order.

7.3.1.2 For flat products the nominal thickness applies. For long products of irregular section the

nominal thickness of that part from which the samples are taken applies (see Annex A).

7.3.2 Impact properties

7.3.2.1 The verification of the impact energy value shall be carried out, unless otherwise agreed upon

(see 7.3.2.2 and 7.3.2.3) with longitudinal test pieces for:
— quality M at −20 °C;
— quality ML at −50 °C.

7.3.2.2 Another temperature (given in Tables 5 and 6) may be agreed upon at the time of the order.

See Option 24, Clause 13 (Agreement on another impact test temperature).

7.3.2.3 If agreed upon at the time of the order the impact properties shall be verified on transverse V-

notch test pieces instead of longitudinal test pieces with minimum values as
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Warmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete FeinkornbaustähleProduits laminés à chaud en aciers de construction - Partie 4 : Conditions techniques de livraison pour les aciers de construction soudable à grains fins obtenus par laminage thermomécaniqueHot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels77.140.50SROL]GHONLFlat steel products and semi-products77.140.10Jekla za toplotno obdelavoHeat-treatable steelsICS:Ta slovenski standard je istoveten z:prEN 10025-4oSIST prEN 10025-4:2018en,fr,de01-september-2018oSIST prEN 10025-4:2018SLOVENSKI

STANDARD
oSIST prEN 10025-4:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
DRAFT prEN 10025-4
June
t r s z ICS
y yä s v rä s râ
y yä s v rä w r Will supersede EN
s r r t wæ vã t r r vEnglish Version
Hot rolled products of structural steels æ Part

vã Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels Produits laminßs à chaud en aciers de construction æ Partie

v ã Conditions techniques de livraison pour les aciers de construction soudable à grains fins obtenus par laminage thermomßcanique

Warmgewalzte Erzeugnisse aus Baustählen æ Teil

vã Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete Feinkornbaustähle This draft European Standard is submitted to CEN members for second enquiryä It has been drawn up by the Technical

If this draft becomes a European Standardá CEN members are bounwhich stipulate the conditions for giving this European Standard the status of a national standard without any alterationä

This draft European Standard was established by CEN in three ofer language made by translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

Recipients of this draft are invited to submitá with their commentsá notification of any relevant patent rights of which they are aware and to provide supporting documentationä

Warning ã This document is not a European Standardä It is distributed for review and commentsä It is subject to change without notice and shall not be referred to as a European Standardä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä prEN

s r r t wæ vã t r s z EoSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 2 Contents Page European foreword ...................................................................................................................................................... 4 1 Scope .................................................................................................................................................................... 6 2 Normative references .................................................................................................................................... 6 2.1 General standards .......................................................................................................................................... 6 2.2 Standards on dimensions and tolerances .............................................................................................. 7 2.3 Standards on testing ...................................................................................................................................... 7 3 Terms and definitions ................................................................................................................................... 8 4 Classification and designation ................................................................................................................... 8 4.1 Classification ..................................................................................................................................................... 8 4.1.1 Main quality classes ....................................................................................................................................... 8 4.1.2 Grades and qualities ...................................................................................................................................... 8 4.2 Designation ....................................................................................................................................................... 9 5 Information to be supplied by the purchaser ....................................................................................... 9 5.1 Mandatory information ................................................................................................................................ 9 5.2 Options ................................................................................................................................................................ 9 6 Manufacturing process ................................................................................................................................. 9 6.1 Steel making process ..................................................................................................................................... 9 6.2 Deoxidation and grain structure ............................................................................................................. 10 6.3 Delivery conditions ...................................................................................................................................... 10 7 Requirements ................................................................................................................................................. 10 7.1 General .............................................................................................................................................................. 10 7.2 Chemical composition ................................................................................................................................. 10 7.3 Mechanical properties ................................................................................................................................ 11 7.3.1 General .............................................................................................................................................................. 11 7.3.2 Impact properties ......................................................................................................................................... 11 7.3.3 Improved deformation properties perpendicular to the surface ............................................... 11 7.4 Technological properties ........................................................................................................................... 11 7.4.1 Weldability ...................................................................................................................................................... 11 7.4.2 Formability and flame straightening ..................................................................................................... 12 7.4.3 Hot-dip zinc-coating ..................................................................................................................................... 12 7.5 Surface properties ........................................................................................................................................ 13 7.5.1 Strip .................................................................................................................................................................... 13 7.5.2 Plates and wide flats .................................................................................................................................... 13 7.5.3 Sections ............................................................................................................................................................. 13 7.5.4 Bars and rods .................................................................................................................................................. 13 7.6 Internal soundness ....................................................................................................................................... 13 7.7 Dimensions, tolerances on dimensions and shape, mass ............................................................... 13 8 Inspection ........................................................................................................................................................ 14 8.1 General .............................................................................................................................................................. 14 8.2 Type of inspection and inspection document ..................................................................................... 14 8.3 Tests to be carried out ................................................................................................................................ 14 9 Frequency of testing and preparation of samples and test pieces .............................................. 15 9.1 Frequency of testing..................................................................................................................................... 15 9.1.1 Chemical analysis .......................................................................................................................................... 15 9.1.2 Mechanical tests ............................................................................................................................................ 15 oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 3 9.2 Preparation of samples and test pieces ................................................................................................ 15 9.2.1 Selection and preparation of samples for chemical analysis ....................................................... 15 9.2.2 Location of samples and orientation of test pieces for mechanical tests ................................. 15 9.2.3 Preparation of test pieces for mechanical tests ................................................................................ 15 9.3 Identification of samples and test pieces ............................................................................................. 16 10 Test methods .................................................................................................................................................. 16 10.1 Chemical analysis ......................................................................................................................................... 16 10.2 Mechanical tests ............................................................................................................................................ 17 10.2.1 Tensile test ...................................................................................................................................................... 17 10.2.2 Impact test ....................................................................................................................................................... 17 10.3 Ultrasonic testing .......................................................................................................................................... 17 10.4 Retests .............................................................................................................................................................. 17 11 Marking, labelling, packaging .................................................................................................................. 17 12 Complaints ...................................................................................................................................................... 18 13 Options ............................................................................................................................................................. 18 Annex A (normative)

Location of samples and test pieces ........................................................................... 25 Bibliography ................................................................................................................................................................. 28 oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 4 European foreword This document (prEN 10025-4:2018) has been prepared by Technical Committee ECISS/TC 103 “Structural steels other than reinforcements”, the secretariat of which is held by DIN. This document is currently submitted to the second CEN Enquiry. This document will supersede EN 10025-4:2004. This European Standard consists of the following parts, under the general title Hot rolled products of structural steels: Part 1: General Part 2: Technical delivery conditions for non-alloy structural steels Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels Part 5: Technical delivery conditions for structural steels with improved atmospheric corrosion resistance Part 6: Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition For a short transition period there will be a coexistence of EN 10025-1:2004 with EN 10025-2 to EN 10025-6:2018, since the new EN 10025-1 has to fulfil the requirements of the CPR and will therefore be published later. For this short transition period up-to-the publication of the next edition of part 1 the following has to be taken into account for EN 10025-1:2004: a) all dated and undated references to EN 10025-1:2004 to EN 10025-6:2004 are unchanged to this version with following exception: In 9.2.2.1 the reference must be 8.3.1 and 8.3.2 instead of 8.4.1 and 8.4.2, b) Clauses 5, 12 and 13 of EN 10025-1:2004 are no longer relevant. The main changes with respect to the previous edition are listed below: a) part 4 is now a stand-alone standard for technical delivery conditions including the preparation of samples and test pieces, the test methods, the marking, labelling and packaging and the drawings; b) for construction purposes this standard and part 1 must be used together; c) requirements for elements not definded were added to 7.2.1 and 7.2.2; d) Option 33 was added, Option 3 was renumbered to Option 24 and Option 9 was deleted; e) Si-content in 7.2.4 was changed; f) 7.4.3 concerning hot-dip zinc coating was modified; g) key to Figure A.1 was updated; h) steel grade S500M was added; oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 5 i) Annex B deleted; j) references were updated and document editorial revised.

oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 6 1 Scope This document specifies technical delivery conditions for flat and long products of hot rolled weldable fine grain structural steels in the thermomechanical rolled condition in the grades and qualities given in Tables 1 to 3 (chemical composition) and Tables 4 to 6 (mechanical properties) in thickness

¶ 150 mm. The steels specified in this document are especially intended for use in heavily loaded parts of welded structures such as, bridges, flood gates, storage tanks, water supply tanks, etc., for service at ambient and low temperatures. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. 2.1 General standards EN 1011-2, Welding — Recommendations for welding of metallic materials — Part 2: Arc welding of ferritic steels EN 10020:2000, Definition and classification of grades of steel EN 10021, General technical delivery conditions for steel products EN 10025-1:2004, Hot rolled products of structural steels — Part 1: General technical delivery conditions EN 10027-1, Designation systems for steels — Part 1: Steel names EN 10027-2, Designation systems for steels — Part 2: Numerical system EN 10079, Definition of steel products EN 10163-1, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections — Part 1: General requirements EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections — Part 2: Plate and wide flats EN 10163-3, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections — Part 3: Sections EN 10164, Steel products with improved deformation properties perpendicular to the surface of the product — Technical delivery conditions EN 10168, Steel products — Inspection documents — List of information and description EN 10204, Metallic products — Types of inspection documents CR 10320, Optical emission analysis of low alloy steels (routine method) — Method for determination of C, Si, S, P, Mn, Cr, Ni and Cu CEN/TR 10347, Guidance for forming of structural steels in processing FprEN ISO 9443:2018, Surface quality classes for hot-rolled bars and wire rod (ISO/FDIS 9443:2018) oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 7 EN ISO 14713-2:2009, Zinc coatings — Guidelines and recommendations for the protection against corrosion of iron and steel in structures — Part 2: Hot dip galvanizing (ISO 14713-2:2009) 2.2 Standards on dimensions and tolerances EN 10017, Steel rod for drawing and/or cold rolling — Dimensions and tolerances EN 10024, Hot rolled taper flange I sections — Tolerances on shape and dimensions EN 10029, Hot-rolled steel plates 3 mm thick or above — Tolerances on dimensions and shape EN 10034, Structural steel I and H sections — Tolerances on shape and dimensions EN 10048, Hot rolled narrow steel strip — Tolerances on dimensions and shape EN 10051, Continuously hot-rolled strip and plate/sheet cut from wide strip of non-alloy and alloy steels — Tolerances on dimensions and shape EN 10055, Hot rolled steel equal flange tees with radiused root and toes — Dimensions and tolerances on shape and dimensions EN 10056-1, Structural steel equal and unequal leg angles — Part 1: Dimensions EN 10056-2, Structural steel equal and unequal leg angles — Part 2: Tolerances on shape and dimensions EN 10058, Hot rolled flat steel bars for general purposes — Dimensions and tolerances on shape and dimensions EN 10059, Hot rolled square steel bars for general purposes — Dimensions and tolerances on shape and dimensions EN 10060, Hot rolled round steel bars for general purposes — Dimensions and tolerances on shape and dimensions EN 10061, Hot rolled hexagon steel bars for general purposes — Dimensions and tolerances on shape and dimensions EN 10067, Hot rolled bulb flats — Dimensions and tolerances on shape, dimensions and mass EN 10279, Hot rolled steel channels — Tolerances on shape, dimensions and mass EN 10363, Continuously hot-rolled patterned steel strip and plate/sheet cut from wide strip — Tolerances on dimensions and shape EN 10365, Hot rolled steel channels, I and H sections — Dimensions and masses 2.3 Standards on testing EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection method) EN 10306, Iron and steel — Ultrasonic testing of H beams with parallel flanges and IPE beams EN 10308, Non destructive testing — Ultrasonic testing of steel bars EN ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method (ISO 148-1) oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 8 EN ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing (ISO 377:2017) EN ISO 643, Steels — Micrographic determination of the apparent grain size (ISO 643) EN ISO 6892-1:2016, Metallic materials — Tensile testing — Part 1: Method of test at room temperature (ISO 6892-1:2016) EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical composition (ISO 14284) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10079 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp 3.1 thermomechanical rolling rolling process in which the final deformation is carried out in a certain temperature range leading to a material condition with certain properties which cannot be achieved or repeated by heat treatment alone Note 1 to entry: Thermomechanical rolling can include processes with an increasing cooling rate with or without tempering including self-tempering but excluding direct quenching and quenching and tempering. Note 2 to entry: In some publications the word TMCP (Thermomechanical Control Process) is also used. 3.2 fine grain steels steels with fine grain structure with an equivalent index of ferritic grain size

x Note 1 to entry: For the determination of grain sizes see EN ISO 643. 4 Classification and designation 4.1 Classification 4.1.1 Main quality classes All steel grades specified in this document shall be classified as alloy special steels according to EN 10020 except grade S275 which is a non-alloy quality steel. 4.1.2 Grades and qualities This document specifies five steel grades S275, S355, S420, S460 and S500. All steel grades may be supplied in the following qualities as specified at the time of the order: — with specified minimum values of impact energy at temperatures not lower than

« t r °C, designated as M; — with specified minimum values of impact energy at temperatures not lower than

« w r °C, designated as ML. oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 9 4.2 Designation 4.2.1 For the steel grades covered by this document the steel names shall be allocated in accordance with EN 10027-1; the steel numbers shall be allocated in accordance with EN 10027-2. 4.2.2 The designation shall consist of: — number of this document (EN 10025-4); — steel name or the steel number; the steel name consisting of: — symbol S (for structural steel); — indication of the minimum specified yield strength for thickness

¶ 16 mm expressed in MPa; — delivery condition M; — capital letter L for the quality with specified minimum values of impact energy at temperatures not lower than

« w r °C. EXAMPLE Thermomechanical rolled structural steel (S) with a specified minimum yield strength at room temperature of 355 MPa and with a specified minimum impact energy at

« w r

C: EN 10025-4 - S355ML or EN 10025-4 - 1.8834 5 Information to be supplied by the purchaser 5.1 Mandatory information The following information shall be supplied by the purchaser at the time of the order: a) quantity to be delivered; b) product form and the number of the standard for dimensions and tolerances(see 2.2); c) nominal dimensions and tolerances on dimensions and shape (see 7.7.1); d) steel designation (see 4.2.2); e) additional requirements of inspection and testing and all required options (see 5.2 and Clause 13); f) type of inspection document according to EN 10204 (see 8.1). 5.2 Options A number of options are specified in Clause 13. In the event that the purchaser does not indicate his wish to implement any of these options, the supplier shall supply in accordance with the basic specification, see 5.1 a) to d) and f). 6 Manufacturing process 6.1 Steel making process The steel making process is at the discretion of the manufacturer with the exclusion of the open hearth (Siemens-Martin) process. See Option 1 (details of manufacturing process). oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 10 6.2 Deoxidation and grain structure Steels of EN 10025-4 shall — be fully killed, — have a fine grain structure, — contain nitrogen binding elements in amounts sufficient to bind the available nitrogen (for example min. 0,020 % total aluminium). The usual guideline is a minimum aluminium to nitrogen ratio of 2:1, when no other nitrogen binding elements are present. Such other elements shall be reported in the inspection document (see Table 1). 6.3 Delivery conditions The products shall be supplied in the thermomechanical rolled condition as defined in Clause 3. 7 Requirements 7.1 General The requirements in 7.2 and 7.3 apply for sampling, preparation of test pieces and testing specified in Clauses 9 and 10. 7.2 Chemical composition 7.2.1 The chemical composition determined by ladle analysis shall comply with the specified values of Table 1. For elements not defined in the table for the chemical composition for ladle analysis, limit values of Table 1 of EN 10020:2000 shall apply as maximum values. 7.2.2 The limits applicable for the product analysis are given in Table 2. The product analysis shall be carried out when specified at the time of the order. See Option 2 (product analysis). For elements not defined in tables for the chemical composition for product analysis, limit values of Table 1 of EN 10020:2000 shall apply as maximum values. 7.2.3 The maximum carbon equivalent values based on the ladle analysis, given in Table 3 shall apply. For determining the carbon equivalent value the following IIW (International Institute of Welding) formula shall be used: +++=+++6515CrMoVNiCuMnCEVC 7.2.4 When products are supplied with a control on Si e.g. for hot-dip zinc-coating so that there could be a need to increase the content of other elements like C and Mn to achieve the required tensile properties, the maximum carbon equivalent values of Table 3 shall be increased as follows: — for Si

¶ 0,04 %, increase the value of the CEV by 0,02; — for Si
¶ 0,25 %, increase the value of the CEV by 0,01. oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 11 7.3 Mechanical properties 7.3.1 General 7.3.1.1 Under the inspection and testing conditions as specified in Clauses 8, 9 and 10 and in the delivery condition as specified in 6.3 the mechanical properties shall comply with the values given in Tables 4 to 6. Stress relieving at more than 580 °C or for over 1 h may lead to a deterioration of the mechanical properties of the steel grades. If the purchaser intends to stress relief the products at higher temperatures or for longer times than mentioned above the minimum values of the mechanical properties after such a treatment should be agreed at the time of the order. 7.3.1.2 For flat products the nominal thickness applies. For long products of irregular section the nominal thickness of that part from which the samples are taken applies (see Annex A). 7.3.2 Impact properties 7.3.2.1 The verification of the impact energy value shall be carried out, unless otherwise agreed (see 7.3.2.2 and 7.3.2.3) with longitudinal test pieces for: — quality M at

« t r °C; — quality ML at

« w r °C. 7.3.2.2 Another temperature (given in Tables 5 and 6) may be agreed at the time of the order. See Option 24 (Agreement on another impact test temperature). 7.3.2.3 If agreed at the time of the order the impact properties shall be verified on transverse V-notch test pieces instead of longitudinal test pieces with minimum values as given in Table 6. See Option 30 (Impact properties verified on transverse test pieces). 7.3.2.4 If specified at the time of the order for flat products out of each parent plate or coil the impact properties only or the impact properties and the tensile properties shall be verified. See Option 13 (For flat products on each parent plate or coil impact properties only to be verified). See Option 14 (For flat products on each parent plate or coil impact and tensile properties to be verified). 7.3.3 Improved deformation properties perpendicular to the surface If agreed at the time of the order flat and long products shall comply with one of the requirements of EN 10164. See Option 4 (Deformation properties perpendicular to the surface). 7.4 Technological properties 7.4.1 Weldability The steels specified in this document shall be suitable for welding. General requirements for arc welding of the steels specified in this document shall be as given in EN 1011-2. NOTE 1 With increasing product thickness and strength level cold cracking can occur. Cold cracking is caused by the following factors in combination: — the amount of diffusible hydrogen in the weld metal; oSIST prEN 10025-4:2018

prEN 10025-4:2018 (E) 12 — a brittle structure of the heat affected zone; — significant tensile stress concentrations in the welded joint. NOTE 2 Due to their favourable chemical composition in comparison to a normalized steel at the same yield strength level, thermomechanically treated steels according to EN 10025-4 exhibit enhanced weldability. 7.4.2 Formability and flame straightening 7.4.2.1 General NOTE Recommendations regarding hot forming, cold forming and flame straightening are laid down in CEN/TR 10347. 7.4.2.2 Hot forming Hot forming shall not be undertaken. NOTE The products ordered and supplied in the thermomechanical rolled condition are not suitable for hot forming. 7.4.2.3 Cold formability

...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Warmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete FeinkornbaustähleProduits laminés à chaud en aciers de construction - Partie 4 : Conditions techniques de livraison pour les aciers de construction soudable à grains fins obtenus par laminage thermomécaniqueHot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels77.140.50SROL]GHONLFlat steel products and semi-products77.140.10Jekla za toplotno obdelavoHeat-treatable steelsICS:Ta slovenski standard je istoveten z:prEN 10025-4oSIST prEN 10025-4:2014en,fr,de01-julij-2014oSIST prEN 10025-4:2014SLOVENSKI

STANDARD
oSIST prEN 10025-4:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
WHITE DRAFT prEN 10025-4
May 2014 ICS 77.140.10; 77.140.50 Will supersede EN 10025-4:2004English Version

Hot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels

Produits laminés à chaud en aciers de construction - Partie 4 : Conditions techniques de livraison pour les aciers de construction soudable à grains fins obtenus par laminage thermomécanique

Warmgewalzte Erzeugnisse aus Baustählen - Teil 4: Technische Lieferbedingungen für thermomechanisch gewalzte schweißgeeignete Feinkornbaustähle This draft European Standard is submitted to ECISS/COCOR before submission to CEN members for formal vote. It has been drawn up by the Technical Committee ECISS/TC 103.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. prEN 10025-4:2014 EoSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 2 Contents Page Foreword .............................................................................................................................................................. 3 1 Scope ...................................................................................................................................................... 4 2 Normative references ............................................................................................................................ 4 2.1 General standards ................................................................................................................................. 4 2.2 Standards on dimensions and tolerances (see 7.7.1) ........................................................................ 5 2.3 Standards on testing ............................................................................................................................. 5 3 Terms and definitions ........................................................................................................................... 6 4 Classification and designation ............................................................................................................. 6 4.1 Classification.......................................................................................................................................... 6 4.2 Designation ............................................................................................................................................ 6 5 Information to be supplied by the purchaser ..................................................................................... 7 5.1 Mandatory information .......................................................................................................................... 7 5.2 Options ................................................................................................................................................... 7 6 Manufacturing process ......................................................................................................................... 7 6.1 Steel making process ............................................................................................................................ 7 6.2 Grain structure ....................................................................................................................................... 8 6.3 Delivery conditions ................................................................................................................................ 8 7 Requirements ......................................................................................................................................... 8 7.1 General .................................................................................................................................................... 8 7.2 Chemical composition .......................................................................................................................... 8 7.3 Mechanical properties ........................................................................................................................... 8 7.4 Technological properties ...................................................................................................................... 9 7.5 Surface properties ...............................................................................................................................11 7.6 Internal soundness ..............................................................................................................................11 7.7 Dimensions, tolerances on dimensions and shape, mass ..............................................................11 8 Inspection .............................................................................................................................................12 8.1 General ..................................................................................................................................................12 8.2 Type of inspection and inspection document ..................................................................................12 8.3 Frequency of testing ...........................................................................................................................12 8.4 Tests to be carried out ........................................................................................................................13 9 Preparation of samples and test pieces ............................................................................................13 9.1 Selection and preparation of samples for chemical analysis .........................................................13 9.2 Location and orientation of samples and test pieces for mechanical tests ..................................13 9.3 Identification of samples and test pieces .........................................................................................14 10 Test methods........................................................................................................................................14 10.1 Chemical analysis ................................................................................................................................14 10.2 Mechanical tests ..................................................................................................................................14 10.3 Ultrasonic testing ................................................................................................................................14 10.4 Retests ..................................................................................................................................................14 11 Marking, labelling, packaging.............................................................................................................14 12 Complaints ...........................................................................................................................................15 13 Options (see 5.2) ..................................................................................................................................15 Bibliography ......................................................................................................................................................22

oSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 3 Foreword This document (prEN 10025-4:2014) has been prepared by Technical Committee ECISS/TC 103 “Structural steels other than reinforcements”, the secretariat of which is held by DIN. This document is currently submitted to the COCOR Vote. This document will supersede EN 10025-4:2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. The titles of the other parts of this document are: Part 1: General; Part 2: Technical delivery conditions for non-alloy structural steels; Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels; Part 5: Technical delivery conditions for structural steels with improved atmospheric corrosion resistance; Part 6: Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition.

oSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 4 1 Scope Part 4 of this document, in addition to Part 1, specifies technical delivery conditions for flat and long products of hot rolled weldable fine grain structural steels in the thermomechanical rolled condition in the grades and qualities given in Tables 1 to 3 (chemical composition) and Tables 4 to 6 (mechanical properties) in thickness ≤ 120 mm for flat products and in thickness ≤ 150 mm for long products. In addition to prEN 10025-1:2014 the steels specified in this document are especially intended for use in heavily loaded parts of welded structures such as, bridges, flood gates, storage tanks, water supply tanks, etc., for service at ambient and low temperatures. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. 2.1 General standards EN 1011-2, Welding – Recommendations for welding of metallic materials - Part 2: Arc welding of ferritic steels. EN 10020:2000, Definition and classification of grades of steel. EN 10021, General technical delivery conditions for steel products prEN 10025-1:2014, Hot rolled products of structural steels - Part 1: General

EN 10027-1, Designation systems for steels - Part 1: Steel names EN 10027-2, Designation systems for steels - Part 2: Numerical system EN 10079:2007, Definition of steel products EN 10163-1, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections – Part 1: General requirements EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections – Part 2: Plates and wide flats EN 10163-3, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections – Part 3: Sections EN 10164, Steel products with improved deformation properties perpendicular to the surface of the product - Technical delivery conditions EN 10168, Steel products – Inspection documents – List of information and description EN 10204, Metallic products – Types of inspection documents EN 10221, Surface quality classes for hot-rolled round bars and rods - Technical delivery conditions EN ISO 14713-2:2009, Guidelines and recommendations for the protection against corrosion of iron and steel structures – Zinc coating – Part 2: Hot dip galvanizing (ISO 14713-2:2009) CEN/TR 10347, Guidance for forming of structural steels in processing oSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 5 2.2 Standards on dimensions and tolerances (see 7.7.1) EN 10017, Non-alloy steel rod for drawing and/or cold rolling – Dimensions and tolerances EN 10024, Hot rolled taper flange I sections - Tolerances on shape and dimensions EN 10029, Hot rolled steel plates 3 mm thick or above - Tolerances on dimensions and shape EN 10034, Structural steel I and H sections - Tolerances on shape and dimensions EN 10048, Hot rolled narrow steel strip - Tolerances on dimensions and shape EN 10051, Continuously hot-rolled uncoated plate, sheet and strip of non-alloy and alloy steels - Tolerances on dimensions and shape EN 10055, Hot-rolled steel equal flange tees with radiused root and toes - Dimensions and tolerances on shape and dimensions EN 10056-1, Structural steel equal and unequal leg angles - Part 1: Dimensions EN 10056-2, Structural steel equal and unequal leg angles - Part 2: Tolerances on shape and dimensions EN 10058, Hot rolled flat steel bars for general purposes - Dimensions and tolerances on shape and dimensions EN 10059, Hot rolled square steel bars - Dimensions and tolerances on shape and dimensions EN 10060, Hot rolled round steel bars - Dimensions and tolerances on shape and dimensions EN 10061, Hot rolled hexagon steel bars - Dimensions and tolerances on shape and dimensions EN 10067, Hot rolled bulb flats - Dimensions and tolerances on shape, dimensions and mass EN 10279, Hot rolled steel channels - Tolerances on shape, dimensions and mass 2.3 Standards on testing EN 10160, Ultrasonic testing of steel flat product of thickness equal to or greater than 6 mm (reflection method) EN 10306, Iron and steel - Ultrasonic testing of H beams with parallel flanges and IPE beams EN 10308, Non-destructive testing - Ultrasonic testing of steel bars EN ISO 148-1, Metallic materials – Charpy pendulum impact test – Part 1: Test method (ISO 148-1:2009) EN ISO 643, Steels – Micrographic determination of the apparent grain size (ISO 643:2003) EN ISO 6892-1, Metallic materials – Tensile testing – Part 1: Method of test at room temperature (ISO 6892-1:2009) EN ISO 14284, Steel and iron – Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996) oSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 6 3 Terms and definitions For the purposes of this document, the terms and definitions given in prEN 10025-1:2014 and the following apply. 3.1 thermomechanical rolling rolling process in which the final deformation is carried out in a certain temperature range leading to a material condition with certain properties which cannot be achieved or repeated by heat treatment alone Note

1 to entry Hot forming or post weld heat treatment at a temperature above 580 °C may lower the strength values and should not be performed. Flame straightening can be applied in accordance with CEN/TR 10347. Note

2 to entry Thermomechanical rolling can include processes with an increasing cooling rate with or without tempering including self-tempering but excluding direct quenching and quenching and tempering. Note

3 to entry In some publications the word TMCP (Thermomechanical Control Process) is also used. 3.2 fine grained steels steels with fine grain structure with an equivalent index of ferritic grain size ≥ 6

Note

1 to entry For the determination of grain sizes see EN ISO 643. 4 Classification and designation 4.1 Classification 4.1.1 Main quality classes All steel grades specified in this document shall be classified as alloy special steels according to EN 10020 except grade S275 which is a non-alloy quality steel. 4.1.2 Grades and qualities This document specifies five steel grades S275, S355, S420, S460 and S500. All steel grades may be supplied in the following qualities as specified at the time of the order: − with specified minimum values of impact energy at temperatures not lower than -20 °C, designated as M; − with specified minimum values of impact energy at temperatures not lower than -50 °C, designated as ML. 4.2 Designation 4.2.1 The designation shall be in accordance with prEN 10025-1. 4.2.2 The designation shall consist of: − number of this document (prEN 10025-4); − steel name or the steel number; the steel name consisting of: − symbol S (for structural steel); oSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 7 − indication of the minimum specified yield strength for thickness ≤ 16 mm expressed in MPa1); − delivery condition M; − capital letter L for the quality with specified minimum values of impact energy at temperatures not lower than -50 °C. EXAMPLE Thermomechanical rolled structural steel (S) with a specified minimum yield strength at room temperature of 355 MPa1)

and with a specified minimum value of impact energy at -50 ºC:
Steel prEN 10025-4 - S355ML

Steel prEN 10025-4 - 1.8834 5 Information to be supplied by the purchaser 5.1 Mandatory information The following information shall be supplied by the purchaser at the time of the order: a) quantity to be delivered; b) product form; c) number of the relevant part of this document; d) steel name or the steel number (see 4.2.2); e) nominal dimensions and tolerances on dimensions and shape (see 7.7.1); f) additional requirements of inspection and testing as specified in prEN 10025-4; g) type of inspection document according to EN 10204 (see 8.2); h) all required options (see 5.2). 5.2 Options A number of options are specified in Clause 13. In the event that the purchaser does not indicate his wish to implement any of these options, the supplier shall supply in accordance with the basic specification (see 5.1 a) to g). 6 Manufacturing process 6.1 Steel making process The steel making process is at the discretion of the manufacturer with the exclusion of the open hearth (Siemens-Martin) process. See option 1.

1) 1 MPa = 1 N/mm2. 1) 1 MPa = 1 N/mm² oSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 8 6.2 Grain structure The steels shall have a fine grain structure containing sufficient amounts of nitrogen binding elements (see

Table 1). 6.3 Delivery conditions The products shall be supplied in the thermomechanical rolled condition as defined in Clause 3. 7 Requirements 7.1 General The following requirements apply when sampling, preparation of test pieces and testing specified in Clauses 8, 9 and 10 are carried out. 7.2 Chemical composition 7.2.1 The chemical composition determined by ladle analysis shall comply with the specified values of Table 1. On special request of the purchaser the manufacturer shall inform the purchaser at the time of the order which of the alloying elements appropriate to the steel grade required will be deliberately added to the material to be delivered. See option 29. For elements not defined in tables for the chemical composition for ladle analysis, limit values of Table 1 of EN 10020:2000 shall apply as maximum values. 7.2.2 The upper limits applicable for the product analysis are given in Table 2. The product analysis shall be carried out when specified at the time of the order. See option 2. For elements not defined in tables for the chemical composition for product analysis, limit values of Table 1 of EN 10020:2000 shall apply as maximum values. 7.2.3 The maximum carbon equivalent values based on the ladle analysis, given in Table 3 shall apply. For the carbon equivalent value formula see 4.4 of prEN 10025-1:2014. 7.2.4 When products are supplied with a control on Si e.g. for hot-dip zinc-coating so that there could be a need to increase the content of other elements like C and Mn to achieve the required tensile properties, the maximum carbon equivalent values of Table 3 shall be increased as follows: − for Si ≤ 0,04 %, increase the value of the CEV by 0,02; − for Si ≤ 0,25 %, increase the value of the CEV by 0,01. 7.3 Mechanical properties 7.3.1 General 7.3.1.1 Under the inspection and testing conditions as specified in Clauses 8, 9 and 10 and in the delivery condition as specified in 6.3 the mechanical properties shall comply with the values given in Tables 4 to 6. NOTE Stress relieving at more than 580 °C or for over 1 h may lead to a deterioration of the mechanical properties of the steel grades as defined in prEN 10025-4. If the purchaser intends to stress relief the products at higher temperatures or for longer times than mentioned above the minimum values of the mechanical properties after such a treatment should be agreed at the time of the order. oSIST prEN 10025-4:2014

prEN 10025-4:2014 (E) 9 7.3.1.2 For flat products the nominal thickness applies. For long products of irregular section the nominal thickness of that part from which the samples are taken applies (see Annex A of prEN 10025-1:2014). 7.3.2 Impact properties 7.3.2.1 The verification of the impact energy value shall be carried out in accordance with prEN 10025-1. Furthermore the verification of the impact energy value shall be carried out, unless otherwise agreed (see 7.3.2.2 and 7.3.2.3) with longitudinal t

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