ISO INTERNATIONAL STANDARD 4950-1 Second edition 1995-08-15 High yield strength flat steel products - Part 1: General requirements Produits plats en aciera haute limite d'élasticité Part 1: Prescriptions generales Referencenumber ISO 4950-1:1995(E) ISO 4950-1:1995(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. Draft International Standards adopted by the technical committees are circuiated to the member bodies for voting. Publication as an International a vote. International Standard iSO 4950-1 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 3, Steels for structural purposes. This second edition cancels and replaces the first edition (ISO 4950-1: 1981), which has been technically revised. ISO 4950 consists of the following parts, under the general title High yield strengthflatsteelproducts: - Part 1: General requirements - Part 2: Products supplied in the normalized or controlled rolled condition Part 3: Products supplied in the heat-treated (quenched + tempered) condition ISO1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland ii INTERNATIONAL STANDARD ISO ISO 4950-1:1995(E) High yield strength flat steel products - Part 1: General requirements 1 Scope Iso 2566-1:1984, Steel — Conversion of elongation values - Part 1: Carbon and low alloy steels. This part of ISO 4950 specifies the methods of manufacture, the acceptance conditions and the IS0 4950-2:1995. High yield strength flat steel marking of high yield strength flat steel products. products Part 2: Products supplied in the normalized or controlled rolled condition. It applies to hot-rolled plates, wide strip in coils of ISO 4950-3:1995, High yield strength flat steel width greater than or equal to 600 mm, and wide flats products- - Part 3: Products supplied in the heat- inhighyieldstrengthsteels(R。min.≥355N/mm2) treated (quenched + tempered) condition. in the thicknesses and conditions specified in ISO 4950-2 and ISO 4950-3 for use in bolted, rivetted ISO 6892:1984, Metallic materials - Tensile testing or welded structures1. ISO 6929:1987, Steel products - Definitions and clas- sification 2 Normative references Iso 7452:1984, Hot-rolled structural steel plates Tolerances on dimensions and shape. The following standards contain provisions which through reference in this text, constitute provisions of ISO 7788:1985, Steel --- Surface finish of hot-rolled thispartofiSO4950.Atthetimeofpublication,the plates and wide flats Delivery requirements. editions indicated were valid. All standards are subject ISO 10474:1991,Steel and steel torevision,andpartiestoagreementsbasedonthis products part of isO 4950 are encouraged to investigate the Inspection documents. possibility of applying the most recent editions of the standardsindicatedbelow.MembersofIECandiSO maintain registers of currently valid International 3 Definitions Standards. For the purposes of this part of iSO 4950, the IsO 148:1983, SteelCharpy impact test (V-notch). definitions of the terms "plates", "wide strip" and "wide flat" given in ISO 6929 apply. IsO 377-1:1989, Selection and preparation of samples and test pieces of wrought steel Part 1: Samples andtestpiecesfo