EN 10025-4:2019
(Main)Hot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels
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
- Withdrawn
- Publication Date
- 13-Aug-2019
- Withdrawal Date
- 13-Apr-2025
- Technical Committee
- ECISS/TC 103 - Structural steels other than reinforcements
- Drafting Committee
- ECISS/TC 103 - Structural steels other than reinforcements
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 07-Dec-2022
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 08-Jun-2022
- Effective Date
- 18-Jan-2023
- Effective Date
- 27-Oct-2021
Frequently Asked Questions
EN 10025-4:2019 is a standard published by the European Committee for Standardization (CEN). Its full title is "Hot rolled products of structural steels - Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels". This standard covers: 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.
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.
EN 10025-4:2019 is classified under the following ICS (International Classification for Standards) categories: 77.140.10 - Heat-treatable steels; 77.140.50 - Flat steel products and semi-products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 10025-4:2019 has the following relationships with other standards: It is inter standard links to EN 10025-4:2004, EN 10025-4:2019+A1:2022, EN 10025-4:2019/prA1. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 10025-4:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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.
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
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
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;
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.
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
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)
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
M;
— with specified minimum values of impact energy at temperatures not lower than −50 °C, designated as
ML.
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
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, Clause 13 (details of manufacturing process).
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
Mn
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.
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 given in Table 6.
See Option 30, Clause 13 (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, Clause 13 (For flat products on each parent plate or coil impact properties only to be
verified).
See Option 14, Clause 13 (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 uponat the time of the order flat and long products shall comply with one of the requirements of
EN 10164.
See Option 4, Clause 13 (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;
— 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
Recommendations regarding hot forming, cold forming and flame straightening are laid out 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
7.4.2.3.1 General
NOTE Cold forming leads to reduction in the ductility. Furthermore, it is necessary to draw the attention to the
risk of brittle fracture in connection with hot-dip zinc coating.
7.4.2.3.2 Flangeability
If specified at the time of the order plate, sheet, strip and wide flats with a nominal thickness ≤ 12 mm shall
be suitable for flanging without cracking with the following minimum bend radii:
— 2 times the nominal thickness with the axis of the bend in transverse direction and 2,5 times the
nominal thickness in longitudinal direction for the steel grades S275 and S355;
— 4 times the nominal thickness with the axis of the bend in transverse direction and 5 times the nominal
thickness in longitudinal direction for the steel grades S4
...
The standard EN 10025-4:2019 outlines the technical delivery conditions for hot rolled products of structural steels, specifically focusing on thermomechanical rolled weldable fine grain structural steels. Its scope is particularly relevant for industries involved in the fabrication of heavily loaded structures, such as bridges, flood gates, and storage tanks, which require durability and reliability under various environmental conditions. One of the strengths of this standard is its comprehensive specification of the chemical composition and mechanical properties necessary for materials used in demanding applications. The inclusion of extensive tables detailing these properties (Tables 1 to 6) provides essential guidance for manufacturers and engineers in selecting appropriate materials for their projects, ensuring that all structural integrity requirements are met. Furthermore, the standard emphasizes the use of weldable fine grain structural steels, which is a significant advantage in modern construction. These steels offer improved toughness and weldability, particularly beneficial for structures subjected to ambient and low temperatures, enhancing performance and longevity. Overall, EN 10025-4:2019 plays a critical role in standardizing the quality and specifications of hot rolled weldable fine grain structural steels, ensuring that they meet the rigorous demands of structural applications. Its relevance to contemporary construction practices cannot be overstated, as it supports the development of resilient, high-performance structures essential for safety and functionality in various industries.
Die Norm EN 10025-4:2019 legt technische Lieferbedingungen für warmgewalzte, schweißbare feinkörnige Strukturstähle im thermomechanisch gewalzten Zustand fest. Der Anwendungsbereich dieser Norm umfasst sowohl Flach- als auch Langprodukte mit einer maximalen Dicke von 150 mm. Ein herausragendes Merkmal dieser Norm ist die detaillierte Spezifikation der chemischen Zusammensetzungen und der mechanischen Eigenschaften, die in den Tabellen 1 bis 6 klar aufgeführt sind. Dadurch bietet die Norm eine klare Orientierung für Hersteller und Anwender bezüglich der Qualitätsanforderungen, die diese Stahlprodukte erfüllen müssen. Die gezielte Ausrichtung auf hochbelastete Teile geschweißter Konstruktionen, wie Brücken, Fluttore und Lagerbehälter, verdeutlicht die praktische Relevanz dieser Norm für die Ingenieurpraxis. Ein starker Punkt der EN 10025-4:2019 ist ihre Eignung für den Einsatz bei Anwendungstemperaturen sowohl im ambienten als auch im niedrigen Temperaturbereich. Dies eröffnet den Einsatzbereich entscheidend, da viele Anwendungen, die in extremen klimatischen Bedingungen betrieben werden, von diesen speziell entwickelten Stählen profitieren können. Die Norm trägt entscheidend zur Sicherheit und Zuverlässigkeit von Konstruktionen bei, da sie sicherstellt, dass die verwendeten Materialien die benötigten mechanischen Eigenschaften aufweisen, um den hohen Anforderungen der tragenden Strukturen gerecht zu werden. Diese Aspekte machen die EN 10025-4:2019 zu einem unverzichtbaren Dokument für Fachleute im Bau- und Ingenieurwesen, которые engagiert sind, qualitativ hochwertige und leistungsfähige Materialien zu nutzen.
La norme EN 10025-4:2019 fournit des conditions de livraison techniques spécifiques pour les produits plats et longs en aciers de construction à grain fin, laminés à chaud et soudables, dans un état laminé thermomécaniquement. Son périmètre couvre les qualités d'aciers et les compositions chimiques comme spécifié dans les tableaux 1 à 3, ainsi que des propriétés mécaniques selon les tableaux 4 à 6, et ce, pour des épaisseurs allant jusqu'à 150 mm. Les forces de cette norme résident dans sa capacité à garantir des produits en acier adaptés aux applications dans des structures métalliques weldées soumises à des charges importantes. En se concentrant sur les aciers de construction à grain fin, la norme assure également que ces matériaux conservent leurs propriétés mécaniques essentielles dans des conditions ambiantes et à basses températures, répondant ainsi aux exigences de durabilité et de sécurité, notamment dans des contextes critiques comme les ponts et les réservoirs d'eau. L'importance de la norme EN 10025-4:2019 résonne particulièrement dans les domaines de l'ingénierie civile et de la construction, où la résistance et la fiabilité des matériaux sont primordiales. En intégrant des critères spécifiques pour les aciers thermomécaniquement laminés, cette norme représente un standard de référence inestimable pour les ingénieurs et les fabricants d'acier, assurant une conformité avec les meilleures pratiques de l'industrie. Son application est donc directement liée à l'amélioration de la résistance des structures et à la sécurité des constructions modernes.
SIST EN 10025-4:2019 문서는 열간 압연 용접 가능한 미세입자 구조용 강재의 기술적 인도 조건을 규정하고 있습니다. 이 표준은 특히 두께가 150mm 이하인 평면 및 긴 제품에 적용되며, 다양한 화학 조성과 기계적 특성을 포함한 강재의 클래스를 제공합니다. 이 표준의 장점 중 하나는 열역학적 압연 상태에서 제작된 미세입자 구조용 강재의 응용 범위를 넓힌다는 것입니다. 이 강재는 다리, 홍수 게이트, 저장 탱크 및 수조 등을 포함한 용접 구조물의 고하중 부품에 특히 적합하게 설계되어 있습니다. 이러한 응용은 표준에서 규정된 강재의 화학 조성과 기계적 특성 덕분에 가능하며, 즉각적인 하중과 낮은 온도에서도 안정적인 성능을 요구하는 상황에서 사용될 수 있습니다. 또한, SIST EN 10025-4:2019는 특정 환경 조건 아래에서의 용접 시 강재의 성질을 보장하기 위해 강재의 인장 강도, 항복 강도 및 연신율과 같은 다양한 기계적 특성에 대한 기준을 명시합니다. 이는 설계자와 엔지니어가 안전한 구조물을 설계하는 데 필요한 신뢰성을 제공합니다. 결론적으로, SIST EN 10025-4:2019 표준은 열간 압연 용접 가능한 미세입자 구조용 강재에 대한 기술적 인도 조건을 체계적으로 정의함으로써, 고하중 구조물의 신뢰성과 안전성을 확보하는 데 매우 중요한 역할을 합니다. 이 표준은 특정한 기술적 요구사항을 충족시키기 위한 필수적인 지침을 제공하며, 이러한 이유로 현재 및 미래의 건설 및 엔지니어링 프로젝트에 있어서 높은 관련성을 가지고 있습니다.
SIST EN 10025-4:2019の標準は、熱間圧延した溶接可能な微細粒構造鋼の技術的納入条件を詳細に規定しています。この文書の範囲は、厚さ150 mm以下の熱間圧延された微細粒構造鋼の平板および長鋼製品に関するもので、特に耐荷重部品に使用されることを意図しています。主な用途には、橋梁、洪水ゲート、貯蔵タンク、水供給タンクなどが含まれており、環境温度や低温での使用に対応しています。 この標準の強みは、化学成分および機械的特性に関する詳細な情報を提供している点です。具体的には、表1から3で示される化学成分と、表4から6で示される機械的特性が明確に定義されており、鋼材の品質の確保に寄与しています。また、溶接可能な性質を持つことが特徴で、これにより構造物の一体性と耐久性が向上します。さらに、熱間圧延処理により得られる材料特性は、特定の用途において優れた力学的性能を発揮します。 SIST EN 10025-4:2019は、特に建設業界において非常に重要なガイドラインとなっており、鋼材の選定と使用における国際基準に基づいた高い品質を保証します。この標準を遵守することにより、施工業者やエンジニアは信頼性の高い構造物を設計・構築することが可能になります。標準自体の関連性は、同様の用途の他の材料との比較においても明確で、工程の効率化と長寿命化を実現するための基盤を提供しています。
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