ISO 630-3:2021
(Main)Structural steels — Part 3: Technical delivery conditions for fine-grain structural steels
Structural steels — Part 3: Technical delivery conditions for fine-grain structural steels
This document specifies requirements for flat and long products of hot-rolled weldable fine-grain structural steels in the as-rolled (for SG grades only), normalized/normalized rolled and thermomechanical processed delivery conditions. It applies to steel plates rolled on a reversing mill, wide flats, hot-rolled sections and bars, which are intended for use in heavily loaded parts of welded or bolted structures. This document covers 13 grades and 6 qualities. Grades S275, S355, S390, S420, S460 and S500 are covered in Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 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 plates, wide flats, sections and bars with a minimum nominal thickness of 3 mm and a maximum nominal thickness of 250 mm for grades S275N, S355N, S390N, S420N and S460N, a maximum nominal thickness of 150 mm for grades S275M, S355M, S390M, S420M, S460M, and S500M, a maximum nominal thickness of 200 mm for grades SG245, SG325 and SG415, a maximum nominal thickness of 100 mm for grades SG345, SG365 and SG460, and a maximum nominal thickness of 40 mm for grade SG290. 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 website. NOTE 2 In all parts of ISO 630, the term of "thickness" is considered as "nominal thickness", unless otherwise stated.
Aciers de construction — Partie 3: Conditions techniques de livraison pour aciers de construction à grains fins
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 630-3
Second edition
2021-04
Structural steels —
Part 3:
Technical delivery conditions for fine-
grain structural steels
Aciers de construction —
Partie 3: Conditions techniques de livraison pour aciers de
construction à grains fins
Reference number
ISO 630-3:2021(E)
©
ISO 2021
---------------------- Page: 1 ----------------------
ISO 630-3:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 630-3:2021(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 . 3
6.1 Steelmaking process . 3
6.2 Delivery condition . 3
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 . 4
6.7 Dimensions, tolerances on dimensions and shape, mass. 4
7 Inspection . 4
8 Sampling - Frequency of testing . 4
8.1 Verification . 4
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 S275, S355, S390, S420, S460 and S500: Chemical
composition and mechanical properties . 5
Annex B (normative) Steel grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460:
Chemical composition and mechanical properties .15
Bibliography .17
© ISO 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 630-3:2021(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, Steel, Subcommittee SC 3, Steel for
structural purposes.
This second edition cancels and replaces the first edition (ISO 630-3:2012), which has been technically
revised. The main changes compared to the previous edition are as follows:
— grades S390N, S390M, S500M and pertaining requirements have been added;
— 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;
— quality E has been renamed L (impact testing at -50 °C) to keep quality E for impact testing at -40 °C
in all parts;
— quality E (impact testing at -40 °C) has been added
— quality F (impact testing at -60 °C) has been added to S355N and S355M;
— list of options has been integrated in ISO 630-1;
— the formula for CEV has been deleted because given in ISO 630-1;
— test units have been updated;
— in Tables, the designation concerning thickness have been changed into “nominal thickness”;
— order of listing chemical elements has been updated for grades of Annex A in accordance with
ISO 6306;
— bibliography has been updated;
— the content of the document has been updated to harmonize with all parts of ISO 630.
iv © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 630-3:2021(E)
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.
© ISO 2021 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 630-3:2021(E)
Structural steels —
Part 3:
Technical delivery conditions for fine-grain structural steels
1 Scope
This document specifies requirements for flat and long products of hot-rolled weldable fine-
grain structural steels in the as-rolled (for SG grades only), normalized/normalized rolled and
thermomechanical processed delivery conditions. It applies to steel plates rolled on a reversing mill,
wide flats, hot-rolled sections and bars, which are intended for use in heavily loaded parts of welded or
bolted structures.
This document covers 13 grades and 6 qualities. Grades S275, S355, S390, S420, S460 and S500 are
covered in Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 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 plates, wide flats, sections and bars
with a minimum nominal thickness of 3 mm and a maximum nominal thickness of 250 mm for grades
S275N, S355N, S390N, S420N and S460N, a maximum nominal thickness of 150 mm for grades S275M,
S355M, S390M, S420M, S460M, and S500M, a maximum nominal thickness of 200 mm for grades SG245,
SG325 and SG415, a maximum nominal thickness of 100 mm for grades SG345, SG365 and SG460, and a
maximum nominal thickness of 40 mm for grade SG290.
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 website.
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
ISO 643, Steels — Micrographic determination of the apparent grain size
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 630-1 and the following 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 2021 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 630-3:2021(E)
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
fine-grain steel
steel with fine-grain structure with an equivalent index of grain size ≥6 determined in accordance
with ISO 643
Note 1 to entry: See 6.1.
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 13 steel grades. Grades S275, S355, S390, S420, S460 and S500 are covered in
Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 are covered in Annex B.
Each grade is available in up to 6 qualities. These grades and qualities differ in their specified
mechanical properties and impact energy requirements. All S grades require impact testing. SG grades
require impact testing upon agreement at the time of ordering:
— Quality A: no impact testing;
— Quality C: impact testing at 0 °C;
— Quality D: impact testing at -20 °C;
— Quality E: impact testing at -40 °C;
— Quality L: impact testing at -50 °C;
— Quality F: impact testing at -60 °C.
4.3 Normative annexes
The requirements of Annex A or Annex B are to be regarded separately. Each annex 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 indicate a wish to implement any of these
options at the time of the order, the products shall be supplied in accordance with the basic specification
(see 5.1).
2 © ISO 2021 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 630-3:2021(E)
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 contain sufficient amount of nitrogen-binding elements and have a fine-grain structure.
The steels specified in this specification shall be fully killed.
6.2 Delivery condition
The products covered by this document are delivered in the as-rolled (for SG grades only), normalized
rolled, normalized (including normalized + tempered) or thermomechanical processed (including
thermomechanical processed + tempered) condition. The delivery condition shall be indicated in the
inspection document.
6.3 Chemical composition
6.3.1 Heat analysis
The chemical composition determined by heat analysis shall conform with the values given in Table A.1
or Table A.2 or Table B.1.
6.3.2 Product analysis
The product analysis of grades S275, S355, S390, S420, S460 and S500 shall conform with the values
given in Table A.3 or Table A.4.
The permitted deviations on analysis of grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460,
relative to the values f
...
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 630-3
ISO/TC 17/SC 3
Structural steels —
Secretariat: AFNOR
Voting begins on:
Part 3:
2020-12-29
Technical delivery conditions for fine-
Voting terminates on:
grain structural steels
2021-02-23
Aciers de construction —
Partie 3: Conditions techniques de livraison pour aciers de
construction à grains fins
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 630-3:2020(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 630-3:2020(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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 630-3:2020(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 . 3
6.1 Steelmaking process . 3
6.2 Delivery condition . 3
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 . 4
6.7 Dimensions, tolerances on dimensions and shape, mass. 4
7 Inspection . 4
8 Sampling - Frequency of testing . 4
8.1 Verification . 4
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 S275, S355, S390, S420, S460 and S500: Chemical
composition and mechanical properties . 5
Annex B (normative) Steel grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460:
Chemical composition and mechanical properties .15
Bibliography .17
© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 630-3:2020(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, Steel, Subcommittee SC 3, Steel for
structural purposes.
This second edition cancels and replaces the first edition (ISO 630-3:2012), which has been technically
revised. The main changes compared to the previous edition are as follows:
— grades S390N, S390M, S500M and pertaining requirements have been added;
— 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;
— quality E has been renamed L (impact testing at -50 °C) to keep quality E for impact testing at -40 °C
in all parts;
— quality E (impact testing at -40 °C) has been added
— quality F (impact testing at -60 °C) has been added to S355N and S355M;
— list of options has been integrated in ISO 630-1;
— the formula for CEV has been deleted because given in ISO 630-1;
— test units have been updated;
— in Tables, the designation concerning thickness have been changed into “nominal thickness”;
— order of listing chemical elements has been updated for grades of Annex A in accordance with
ISO 6306;
— 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 ----------------------
ISO/FDIS 630-3:2020(E)
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.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 630-3:2020(E)
Structural steels —
Part 3:
Technical delivery conditions for fine-grain structural steels
1 Scope
This document specifies requirements for flat and long products of hot-rolled weldable fine-
grain structural steels in the as-rolled (for SG grades only), normalized/normalized rolled and
thermomechanical processed delivery conditions. It applies to steel plates rolled on a reversing mill,
wide flats, hot-rolled sections and bars, which are intended for use in heavily loaded parts of welded or
bolted structures.
This document covers 13 grades and 6 qualities. Grades S275, S355, S390, S420, S460 and S500 are
covered in Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 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 plates, wide flats, sections and bars
with a minimum nominal thickness of 3 mm and a maximum nominal thickness of 250 mm for grades
S275N, S355N, S390N, S420N and S460N, a maximum nominal thickness of 150 mm for grades S275M,
S355M, S390M, S420M, S460M, and S500M, a maximum nominal thickness of 200 mm for grades SG245,
SG325 and SG415, a maximum nominal thickness of 100 mm for grades SG345, SG365 and SG460, and a
maximum nominal thickness of 40 mm for grades SG290.
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
ISO 643, Steels — Micrographic determination of the apparent grain size
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 630-1 and the following 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: 6 ----------------------
ISO/FDIS 630-3:2020(E)
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
fine-grain steel
steel with fine-grain structure with an equivalent index of grain size ≥6 determined in accordance
with ISO 643
Note 1 to entry: See 6.1.
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 13 steel grades. Grades S275, S355, S390, S420, S460 and S500 are covered in
Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 are covered in Annex B.
Each grade is available in up to 6 qualities. These grades and qualities differ in their specified
mechanical properties and impact energy requirements. All S grades require impact testing. SG grades
require impact testing upon agreement at the time of ordering:
— Quality A: no impact testing;
— Quality C: impact testing at 0 °C;
— Quality D: impact testing at -20 °C;
— Quality E: impact testing at -40 °C;
— Quality L: impact testing at -50 °C;
— Quality F: impact testing at -60 °C.
4.3 Normative annexes
The requirements of Annex A or Annex B are to be regarded separately. Each annex 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 indicate a wish to implement any of these
options at the time of the order, the products shall be supplied in accordance with the basic specification
(see 5.1).
2 © ISO 2020 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/FDIS 630-3:2020(E)
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 contain sufficient amount of nitrogen-binding elements and have a fine-grain structure.
The steels specified in this specification shall be fully killed.
6.2 Delivery condition
The products covered by this document are delivered in the as-rolled (for SG grades only), normalized
rolled, normalized (including normalized + tempered) or thermomechanical processed (including
thermomechanical processed + tempered) condition. The delivery condition shall be indicated in the
inspection document.
6.3 Chemical composition
6.3.1 Heat analysis
The chemical composition determined by heat analysis shall conform with the values given in Table A.1
or T
...
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