High yield strength steel plates and wide flats for cold forming -- Delivery conditions

This document specifies the requirements for weldable high yield strength plates and wide flats for cold forming. It does not apply to weldable structural steels, whether or not of special quality, which are covered by other International Standards, namely: — structural steels: ISO 630 (all parts); — high yield strength flat steel products: ISO 4950-1, ISO 4950-2 and ISO 4950-3; — hot-rolled steel sheet of higher yield strength with improved formability: ISO 5951; — sheet and strip: refer to ISO/TC 17, Steel, SC 12, Continuous mill flat rolled products; — tubular products; refer to ISO/TC 5, Ferrous metal pipes and metallic fittings, SC 1, Steel tubes.

Produits plats en acier à haute limite d'élasticité pour formage à froid -- Conditions de livraison

General Information

Status
Published
Publication Date
21-Jul-2019
Current Stage
6060 - International Standard published
Start Date
26-Jun-2019
Completion Date
22-Jul-2019
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INTERNATIONAL ISO
STANDARD 6930
Second edition
2019-07
High yield strength steel plates and
wide flats for cold forming — Delivery
conditions
Produits plats en acier à haute limite d'élasticité pour formage à
froid — Conditions de livraison
Reference number
ISO 6930:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 6930:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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.
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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ISO 6930:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

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

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

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Dimensions and tolerances ....................................................................................................................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Mandatory information ................................................................................................................................................................... 2

5 Classification and designation ............................................................................................................................................................... 2

5.1 Classification ............................................................................................................................................................................................. 2

5.2 Designation ................................................................................................................................................................................................ 3

5.3 Using Annexes A, B and C .............................................................................................................................................................. 3

6 Technical requirements ................................................................................................................................................................................ 3

6.1 Steelmaking process ........................................................................................................................................................................... 3

6.2 Method of deoxidation ..................................................................................................................................................................... 3

6.3 Production process ......... ..................................................................................................................................................................... 3

6.4 Delivery condition ................................................................................................................................................................................ 3

6.5 Chemical composition ...................................................................................................................................................................... 3

6.5.1 Heat analysis ...................................................................... .................................................................................................. 3

6.5.2 Product analysis tolerances .................................................................................................................................... 3

6.6 Dimensions tolerances and surface condition ............................................................................................................. 4

6.7 Internal soundness .............................................................................................................................................................................. 4

7 Mechanical properties .................................................................................................................................................................................... 4

7.1 Tensile properties ................................................................................................................................................................................. 4

7.2 Impact properties ................................................................................................................................................................................. 4

7.3 Technical properties ........................................................................................................................................................................... 4

7.3.1 Weldability ............................................................................................................................................................................ 4

7.3.2 Bending and cold-edging ability ......................................................................................................................... 4

8 Inspection and testing .................................................................................................................................................................................... 5

8.1 General ........................................................................................................................................................................................................... 5

8.2 Test unit ......... ................................................................................................................................................................................................ 5

8.2.1 Product analysis ............................................................................................................................................................... 5

8.2.2 Mechanical properties ................................................................................................................................................ 5

8.3 Position and orientation of sample ....................................................................................................................................... 5

8.4 Preparation ................................................................................................................................................................................................ 5

8.4.1 Tensile test pieces ........................................................................................................................................................... 5

8.4.2 Impact test pieces ........................................................................................................................................................... 5

8.5 Testing ............................................................................................................................................................................................................ 6

8.5.1 Tensile Test ........................................................................................................................................................................... 6

8.5.2 Impact test ............................................................................................................................................................................. 6

8.5.3 Bend test ................................................................................................................................................................................. 6

8.5.4 Product analysis ............................................................................................................................................................... 6

8.6 Retests ............................................................................................................................................................................................................ 6

9 Inspection documents ..................................................................................................................................................................................... 7

10 Sorting and reprocessing ............................................................................................................................................................................. 7

11 Marking .......................................................................................................................................................................................................................... 7

Annex A (normative) Chemical composition and mechanical properties of normalized and

normalized rolled steels for steel grades S260NC, S315NC, S355NC and S420NC ...........................8

© ISO 2019 – All rights reserved iii
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ISO 6930:2019(E)
Annex B (normative) Chemical composition and mechanical properties of
thermomechanically rolled steels for steel grades S315MC, S355MC, S420MC,

S460MC, S500MC, S550MC, S600MC, S650MC, S700MC, S900MC and S960MC ................................10

Annex C (normative) Chemical composition and mechanical properties for steel grades

S345, S415, S485, S550 and S690 .....................................................................................................................................................12

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

iv © ISO 2019 – All rights reserved
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ISO 6930:2019(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, Steels for

structural purposes.

This second edition cancels and replaces ISO 6930-1:2001 and ISO 6930-2:2004, which have been

technically revised.

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 2019 – All rights reserved v
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INTERNATIONAL STANDARD ISO 6930:2019(E)
High yield strength steel plates and wide flats for cold
forming — Delivery conditions
1 Scope

This document specifies the requirements for weldable high yield strength plates and wide flats for

cold forming.

It does not apply to weldable structural steels, whether or not of special quality, which are covered by

other International Standards, namely:
— structural steels: ISO 630 (all parts);

— high yield strength flat steel products: ISO 4950-1, ISO 4950-2 and ISO 4950-3;

— hot-rolled steel sheet of higher yield strength with improved formability: ISO 5951;

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

— tubular products; refer to ISO/TC 5, Ferrous metal pipes and metallic fittings, SC 1, Steel tubes.

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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method

ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing

ISO 404, Steel and steel products — General technical delivery requirements

ISO 2566-1, Steel — Conversion of elongation values — Part 1: Carbon and low alloy steels

ISO 4885, Ferrous materials — Heat treatments — Vocabulary

ISO 4948-1, Steels — Classification — Part 1: Classification of steels into unalloyed and alloy steels based

on chemical composition

ISO 4948-2, Steels — Classification — Part 2: Classification of unalloyed and alloy steels according to main

quality classes and main property or application characteristics
ISO/TS 4949, Steel names based on letter symbols

ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

ISO 6929, Steel products — Vocabulary
ISO 7438, Metallic materials — Bend test
ISO 7452, Hot-rolled steel plates — Tolerances on dimensions and shape

ISO 7788, Steel — Surface finish of hot-rolled plates and wide flats — Delivery requirements

ISO 9034, Hot-rolled structural steel wide flats — Tolerances on dimensions and shape

ISO/TR 9769, Steel and iron — Review of available methods of analysis
© ISO 2019 – All rights reserved 1
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ISO 6930:2019(E)
ISO 10474, Steel and steel products — Inspection documents

ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical

composition

ISO 17577, Steel — Ultrasonic testing of steel flat products of thickness equal to or greater than 6 mm

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6929 and ISO 4885 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
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
wide flat

flat product of width over 150 mm up to and including 1 250 mm and thickness generally over 4 mm,

supplied in lengths, i.e. not coiled, and the edges are square, i.e. hot-rolled on all four sides (or in box passes)

4 Dimensions and tolerances
4.1 General

This document applies to plates and wide-flats, hot-rolled on reversing mills, of a thickness ≤20 mm for

grades specified in Annexes A and B and of a thickness between 4 mm and 50 mm (inclusive) for grades

specified in Annex C.
4.2 Mandatory information

The following information shall be supplied by the purchaser at the time of enquiry and order:

a) the quantity required;
b) the type of product;
c) the nominal dimensions and tolerances on dimensions and shape of the product;
d) the number of this document, i.e. ISO 6930;
e) the steel name (grade);
f) all required options;
g) inspection document to be issued.
5 Classification and designation
5.1 Classification

The steel grades specified in this document shall be classified as non-alloy or alloy quality steels in

accordance with ISO 4948-1, ISO 4948-2 and ISO/TS 4949 depending on the steel-grade chemical

composition and heat treatment condition.
2 © ISO 2019 – All rights reserved
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ISO 6930:2019(E)
5.2 Designation
Designation shall be carried out in accordance with ISO/TS 4949.
This document specifies twenty (20) steel grades.
Grades S260NC, S315NC, S355NC, and S420NC are specified in Annex A.

Grades S315MC, S355MC, S420MC, S460MC, S500MC, S550MC, S600MC, S650MC, S700MC, S900MC and

S960MC are specified in Annex B.
Grades S345, S415, S485, S550 and S690 are specified in Annex C.
5.3 Using Annexes A, B and C

The requirements of Annexes A, B and C shall be regarded separately. Each is independent of the other

...

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