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

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.

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
Publication Date
13-Aug-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
18-Sep-2012

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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.

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SIST EN 10025-4:2019
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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;
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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
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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).
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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.
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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
...

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