ISO/FDIS 630-2

Structural steels

Aciers de construction

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 630-2
ISO/TC 17/SC 3 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2020-01-20 2020-04-13
Structural steels —
Part 2:
Technical delivery conditions for structural steels for
general purposes
Aciers de construction —

Partie 2: Conditions techniques de livraison pour aciers de construction métallique d'usage général

ICS: 77.140.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 630-2:2020(E)
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. ISO 2020
---------------------- Page: 1 ----------------------
ISO/DIS 630-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 630-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Classification and designation ............................................................................................................................................................... 2

4.1 Classification ............................................................................................................................................................................................. 2

4.2 Designation (grades and qualities) ....................................................................................................................................... 2

4.3 Normative Annexes ............................................................................................................................................................................. 2

5 Information to be supplied by the purchaser......................................................................................................................... 2

5.1 Mandatory information ................................................................................................................................................................... 2

5.2 Options ........................................................................................................................................................................................................... 2

6 Requirements .......................................................................................................................................................................................................... 2

6.1 Steelmaking process ........................................................................................................................................................................... 2

6.2 Delivery condition ................................................................................................................................................................................ 2

6.3 Chemical composition ...................................................................................................................................................................... 3

6.3.1 Heat analysis ...................................................................... .................................................................................................. 3

6.3.2 Product analysis ............................................................................................................................................................... 3

6.3.3 Carbon equivalent value ............................................................................................................................................ 3

6.4 Mechanical properties ...................................................................................................................................................................... 3

6.4.1 Tensile properties ........................................................................................................................................................... 3

6.4.2 Charpy V‑notch impact properties ................................................................................................................... 3

6.5 Surface condition .................................................................................................................................................................................. 3

6.6 Internal soundness .............................................................................................................................................................................. 3

6.7 Dimensions, tolerances on dimensions and shape, mass................................................................................... 3

7 Inspection .................................................................................................................................................................................................................... 3

8 Sampling - Frequency of testing ........................................................................................................................................................... 3

8.1 Verification ................................................................................................................................................................................................. 3

8.2 Test units ...................................................................................................................................................................................................... 4

8.2.1 Annex A ................................................................................................................................................................................... 4

8.2.2 Annex B ................................................................................................................................................................................... 4

9 Test methods ............................................................................................................................................................................................................. 4

10 Marking .......................................................................................................................................................................................................................... 4

Annex A (normative) Steel grades S235, S275, S355 and S460: Chemical composition and

mechanical properties ................................................................................................................................................................................... 5

Annex B (normative) Steel grades SG205, SG250, SG285 and SG345: Chemical composition

and mechanical properties .....................................................................................................................................................................10

Bibliography .............................................................................................................................................................................................................................14

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 630-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 17,Steels, Subcommittee SC 3, Steels for

construction purposes.

This third edition cancels and replaces the second edition (ISO 630‑2:2011), which has been technically

revised.
A list of all parts in the ISO 630 series can be found on the ISO website.
The main changes compared to the previous edition are as follows:
— applicable thickness ranges have been added in the scope;

— additional terms and definitions concerning heat treatments have been deleted because ISO 4885 is

in normative references of ISO 630-1;
— list of options has been integrated in ISO 630-1;
— test units have been updated;

— in Tables, the designation concerning thickness have been changed into “nominal thickness”;

— bibliography has been updated;

— the content of the document has been updated to harmonize with all parts of ISO 630.

iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 630-2:2020(E)
Structural steels —
Part 2:
Technical delivery conditions for structural steels for
general purposes
1 Scope

This document specifies qualities for steels for general structural use. This document applies to steel

plates rolled on a reversing mill, wide flats, hot‑rolled sections and bars, which are used in the as‑

delivered condition and normally intended for welded or bolted structures.

This document covers 8 steel grades and 4 qualities. Grades S235, S275, S355, and S460 are covered in

Annex A. Grades SG205, SG250, SG285 and SG345 are covered in Annex B. Not all grades are available in

all qualities, and some qualities have Charpy V‑notch requirements.

The steels specified in this document are applicable to hot‑rolled flat products and sections with a

minimum nominal thickness of 3 mm and a maximum nominal thickness of 400 mm for grades S235,

S275, S355, a maximum nominal thickness of 150 mm for grade S460 only for long products, and no

restriction on nominal thickness for grades SG205, SG250, SG285, and SG345 for flat products, sections

and long products,

This document does not include the following structural steels, some of which are covered by other

International Standards:

— sheet and strip: refer to ISO TC 17/SC 12 “Continuous mill flat rolled products”;

— tubular products: refer to ISO TC 5/SC 1 “Steel tubes”.

NOTE 1 Lists of standards covered by ISO/TC 17/SC 12 and ISO/TC 5/SC 1 are available on the ISO Web site.

NOTE 2 In all parts of ISO 630, the term of "thickness" is considered as "nominal thickness", unless

otherwise stated.
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.

ISO 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 630‑1 apply.

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

— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/DIS 630-2:2020(E)
4 Classification and designation
4.1 Classification

The steel grades specified in this document shall be classified as unalloyed or alloy steels.

4.2 Designation (grades and qualities)

This document specifies 8 steel grades. Grades S235, S275, S355, and S460 are covered in Annex A.

Grades SG205, SG250, SG285, and SG345 are covered in Annex B. Each grade is available in up to 4

qualities. These grades and qualities differ in their specified mechanical properties and impact energy

requirements.
— Quality A: no impact testing.
— Quality B: impact testing at 20 °C.
— Quality C: impact testing at 0 °C.
— Quality D: impact testing at −20 °C.
4.3 Normative Annexes

The requirements of Annex A or Annex B are to be regarded separately. Each is independent of the

other without combining in any way.
5 Information to be supplied by the purchaser
5.1 Mandatory information

The information that shall be supplied by the purchaser at the time of the order is specified in ISO 630‑1.

5.2 Options

The options of ISO 630‑1 may apply. If the purchaser does not specify any of these options at the time of

enquiry and order, the products shall be supplied in accordance with the basic specification (see 5.1).

6 Requirements
See ISO 630-1.
6.1 Steelmaking process
See ISO 630-1.

If a special steelmaking process has been specified, this shall be reported in the inspection document.

The steels shall be killed (non-rimming).
6.2 Delivery condition

At the manufacturer's discretion, the products covered by this document shall be delivered in the as‑

rolled cond
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 630-2
ISO/TC 17/SC 3
Structural steels —
Secretariat: AFNOR
Voting begins on:
Part 2:
2020-12-29
Technical delivery conditions for
Voting terminates on:
structural steels for general purposes
2021-02-23
Aciers de construction —
Partie 2: Conditions techniques de livraison pour aciers de
construction métallique d'usage général
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 630-2:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 630-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 630-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Classification and designation ............................................................................................................................................................... 2

4.1 Classification ............................................................................................................................................................................................. 2

4.2 Designation (grades and qualities) ....................................................................................................................................... 2

4.3 Normative Annexes ............................................................................................................................................................................. 2

5 Information to be supplied by the purchaser......................................................................................................................... 2

5.1 Mandatory information ................................................................................................................................................................... 2

5.2 Options ........................................................................................................................................................................................................... 2

6 Requirements .......................................................................................................................................................................................................... 2

6.1 Steelmaking process ........................................................................................................................................................................... 2

6.2 Delivery condition ................................................................................................................................................................................ 2

6.3 Chemical composition ...................................................................................................................................................................... 3

6.3.1 Heat analysis ...................................................................... .................................................................................................. 3

6.3.2 Product analysis ............................................................................................................................................................... 3

6.3.3 Carbon equivalent value ............................................................................................................................................ 3

6.4 Mechanical properties ...................................................................................................................................................................... 3

6.4.1 Tensile properties ........................................................................................................................................................... 3

6.4.2 Charpy V‑notch impact properties ................................................................................................................... 3

6.5 Surface condition .................................................................................................................................................................................. 3

6.6 Internal soundness .............................................................................................................................................................................. 3

6.7 Dimensions, tolerances on dimensions and shape, mass................................................................................... 3

7 Inspection .................................................................................................................................................................................................................... 3

8 Sampling - Frequency of testing ........................................................................................................................................................... 3

8.1 Verification ................................................................................................................................................................................................. 3

8.2 Test units ...................................................................................................................................................................................................... 4

8.2.1 Annex A .................................................................................................................................................................................... 4

8.2.2 Annex B .................................................................................................................................................................................... 4

9 Test methods ............................................................................................................................................................................................................. 4

10 Marking .......................................................................................................................................................................................................................... 4

Annex A (normative) Steel grades S235, S275, S355 and S460: Chemical composition and

mechanical properties ................................................................................................................................................................................... 5

Annex B (normative) Steel grades SG205, SG250, SG285 and SG345: Chemical composition

and mechanical properties .....................................................................................................................................................................12

Bibliography .............................................................................................................................................................................................................................16

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 630-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 17,Steels, Subcommittee SC 3, Steels for

construction purposes.

This third edition cancels and replaces the second edition (ISO 630‑2:2011), which has been technically

revised. The main changes compared to the previous edition are as follows:
— applicable thickness ranges have been added in the scope;

— additional terms and definitions concerning heat treatments have been deleted because ISO 4885 is

in normative references of ISO 630-1;
— list of options has been integrated in ISO 630-1;
— test units have been updated;

— in Tables, the designation concerning thickness have been changed into “nominal thickness”;

— bibliography has been updated;

— the content of the document has been updated to harmonize with all parts of ISO 630.

A list of all parts in the ISO 630 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 630-2:2020(E)
Structural steels —
Part 2:
Technical delivery conditions for structural steels for
general purposes
1 Scope

This document specifies qualities for steels for general structural use. This document applies to steel

plates rolled on a reversing mill, wide flats, hot‑rolled sections and bars, which are used in the as‑

delivered condition and normally intended for welded or bolted structures.

This document covers 8 steel grades and 4 qualities. Grades S235, S275, S355, and S460 are covered in

Annex A. Grades SG205, SG250, SG285 and SG345 are covered in Annex B. Not all grades are available in

all qualities, and some qualities have Charpy V‑notch requirements.

The steels specified in this document are applicable to hot‑rolled flat products and sections with :

— thicknesses ≥ 3 mm and ≤ 150 mm for long products of steel grade S460 all qualities

— thicknesses ≥ 3 mm and ≤ 250 mm for long products or ≤ 400 mm for flat products of all other

grades and qualities

and no restriction on nominal thickness for grades SG205, SG250, SG285, and SG345 for flat products,

sections and long products,

This document does not include the following structural steels, some of which are covered by other

International Standards:

— sheet and strip: refer to ISO TC 17/SC 12 “Continuous mill flat rolled products”;

— tubular products: refer to ISO TC 5/SC 1 “Steel tubes”.

NOTE 1 Lists of standards covered by ISO/TC 17/SC 12 and ISO/TC 5/SC 1 are available on the ISO Web site.

NOTE 2 In all parts of ISO 630, the term of "thickness" is considered as "nominal thickness", unless

otherwise stated.
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.

ISO 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 630‑1 apply.

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

— ISO Online browsing platform: available at https:// www .iso .org/ obp
© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/FDIS 630-2:2020(E)
— IEC Electropedia: available at http:// www .electropedia .org/
4 Classification and designation
4.1 Classification

The steel grades specified in this document shall be classified as unalloyed or alloy steels.

4.2 Designation (grades and qualities)

This document specifies 8 steel grades. Grades S235, S275, S355, and S460 are covered in Annex A.

Grades SG205, SG250, SG285, and SG345 are covered in Annex B. Each grade is available in up to 4

qualities. These grades and qualities differ in their specified mechanical properties and impact energy

requirements.
— Quality A: no impact testing.
— Quality B: impact testing at 20 °C.
— Quality C: impact testing at 0 °C.
— Quality D: impact testing at −20 °C.
4.3 Normative Annexes

The requirements of Annex A or Annex B are to be regarded separately. Each is independent of the

other without combining in any way.
5 Information to be supplied by the purchaser
5.1 Mandatory information

The information that shall be supplied by the purchaser at the time of the order is specified in ISO 630‑1.

5.2 Options

The options of ISO 630‑1 may apply. If the purchaser does not specify any of these options at the time of

enquiry and order, the products shall be supplied in accordance with the basic specification (see 5.1).

6 Requirements
6.1 Steelmaking process
See ISO 630-1.

If a special steelmaking process has been specified, this shall be reported in the inspection document.

The steels shall be killed (non-rimming).
6.2 Delivery condition

At the manufacturer's discretion, the products covered by this document shall be delivered in the as‑

rolled condition, normalized rolled, normalized or thermomechanical processed condition. The delivery

condition
...