ISO 630-1:2021

INTERNATIONAL ISO
STANDARD 630-1
Second edition
2021-04
Structural steels —
Part 1:
General technical delivery conditions
for hot-rolled products
Aciers de construction —
Partie 1: Conditions générales techniques de livraison pour les
produits laminés à chaud
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 2
4.1 Classification . 2
4.2 Designation . 2
5 Information to be supplied by the purchaser. 3
5.1 Mandatory information . 3
5.2 Options . 3
6 Requirements . 4
6.1 Steelmaking process . 4
6.2 Delivery condition . 4
6.3 Chemical composition . 4
6.3.1 Heat analysis . . 4
6.3.2 Product analysis . 4
6.3.3 Carbon equivalent value . 4
6.4 Mechanical properties . 4
6.4.1 General. 4
6.4.2 Tensile properties . 5
6.4.3 Charpy V-notch impact properties . 5
6.4.4 Through-thickness properties . 5
6.5 Surface condition . 5
6.6 Internal soundness . 5
6.7 Dimensions, tolerances on dimensions and shape, and mass . 5
6.7.1 Dimensions, tolerances on dimensions and shape . 5
6.7.2 Calculation of mass . 5
7 Inspection . 5
7.1 Types of inspection and inspection documents . 5
7.2 Tests to be carried out . 6
7.3 Retests . 6
8 Sampling . 6
8.1 General . 6
8.2 Frequency of testing . 6
8.2.1 Verification of chemical composition . 6
8.2.2 Verification of mechanical properties . 6
8.2.3 Tests to be carried out for specific inspection . 6
8.3 Selection and preparation of samples and test pieces . 7
8.3.1 Sampling and sample preparation. 7
8.3.2 Preparation of samples and test pieces. 7
9 Test methods . 7
9.1 Chemical analysis . 7
9.2 Tensile test . 8
9.3 Impact test . 8
9.4 Through-thickness characteristics test . 8
9.5 Ultrasonic test . 8
10 Marking . 8
Annex A (informative) Applicable standards on dimensions, tolerances, shape and mass .10
Bibliography .11
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
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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).
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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
structural purposes.
This second edition cancels and replaces the first edition (ISO 630-1:2011), which has been technically
revised. The main changes compared to the previous edition are as follows:
― List of normative references has been updated.
― In Tables, the designations concerning thickness have been changed to “nominal thickness”.
― ISO 657-16 has been deleted from Clause 2 and the text in 6.7.1.
― Terms and definitions of “non-specific inspection” and “specific inspection” have been deleted,
because ISO 404 and ISO 10474 have been added in Clause 2.
― Designation of qualities has been added.
― List of options has been updated.
― Content of Table A.1 has been updated.
― The 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 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 630-1:2021(E)
Structural steels —
Part 1:
General technical delivery conditions for hot-rolled
products
1 Scope
This document specifies the general technical delivery conditions for steel flat and long products
(plates/ sections/wide flats and bars) used principally for general-purpose structural steels. The steels
specified in this document are intended for use in welded or bolted structures.
The specific requirements for structural steels are given in the individual parts of ISO 630.
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 doc
...