ISO INTERNATIONAL STANDARD 6934-2 First edition 1991-07-01 Steelfortheprestressingofconcrete Part 2: Cold-drawn wire Acierpourarmaturesdeprécontrainte Partie2:Fil tréfileafroid Reference number ISO 6934-2:1991(E) ISO 6934-2:1991(E) Foreword Iso(the International Organization for Standardization)is a worldwide federation of national standards bodies(IsO memberbodies).Thework of preparing International Standards is normally carried out through Iso technical committees.Each member bodyinterested in a subjectfor whicha technical committee hasbeen established has the right tobe represented on that committee.International organizations,govern- mental and non-governmental, in liaison with iso,also take part in the work.iso collaborates closelywiththeInternational Electrotechnical Commission (IEC)on all matters of electrotechnical standardization. Draft International Standards adopted bythetechnical committeesare circulated to the member bodies for voting.Publication as an Inter- national Standard requires approval by at least75% of the member bodies casting a vote. InternationalStandardiso6934-2waspreparedbyTechnicaiCommittee ISO/TC 17, Steel. Iso 6934 consistsofthefollowingparts,underthegeneral titleSteelfor the prestressing ofconcrete: 一 Part1:General requirements Part2:Cold-drawnwire Part3:Quenchedandtemperedwire Part 4: Strand Part5:Hot-rolledsteel barswithorwithout subsequentprocessing AnnexesAandBofthispartofIsO6934areforinformationonly CISO1991 All rights reserved.No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical, including photocopying and microfilm,without permission In writing from the publisher. InternationalOrganizationforStandardization CasePostale56.CH-1211Geneve20·Switzerland Printed in Switzerland ii ISO 6934-2:1991(E) INTERNATIONALSTANDARD Steel for the prestressing of concrete Part 2: Cold-drawn wire Scope 1 Surface configuration This part of Iso6934 specifies requirements for There are several types of surface configuration round,cold-drawn,high-tensile steel wire,either (ribs,indentations,crimps),thepurposeofwhichis plain, indented, ribbed or crimped. The product is to improvebond properties between wire and con- supplied as mill coil wire or straightened and crete. The type of surface configuration shall be stress-relieved wire in coils or cut lengths, accord- agreed betweenpurchaserand manufacturer. ing to the general requirements specified in Examples of indentations and crimps are given in ISO 6934-1. annex A. 2 Normative reference The following standard contains provisions which, 6 Properties through reference in this text, constitute provisions of thispartofIsO6934.Atthetimeof publication, The designations,data for information and required properties are given in table1 and table2. theeditionindicatedwasvalid.Allstandardsare subjecttorevision,andpartiestoagreementsbased onthispartof isO6934areencouragedto investi- gate the possibility of applying the most reccnt edi- 6.1 Dimensions and properties of mill coil tion of the standard indicated below.Members of wire IEC and iso maintain registers of currently valid International Standards. 6.1.1 Dimensions,masses and tensileproperties iso6934-1:1991,Steelfortheprestressingofcon- crete-Part 1:General requirements. See table 1. 3 Definitions 6.1.2Elongationandductility For the purposes of iso6934,the definitionsgiven The percentagetotal elongation at maximum force, in iso 6934-1 apply. measured onalength of 200mm,shall benot less than 1,5 %. 4 Conditions of manufacture All wires shall show a ductile fracture with a con- striction visible to the naked eye. The wire shall be manufactured from high carbon All wires shall withstand a reversebendtestaround steel in accordance with Iso 6934-1. the bend radius given in the last column of table 1. The wire shall be suppliedwithout welds or other Theminimumnumberofbendsisfourforplain joints. wires and three for indented and ribbed wires. 1