ISO INTERNATIONAL STANDARD 6931-1 Third edition 2016-05-15 Stainless steels for springs Part 1: Wire Aciers inoxydables pourressorts- Partie 1: Fils Reference number IS0 6931-1:2016(E) ISO International Organization for Standardization ISee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02016 vided by IHS under I Not for Resale, 2016/7/20 08:04:18 No reproduction or networking permitted without license from IHS IS0 6931-1:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, 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. ISOcopyrightoffice Ch. de Blandonnet 8 · CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internationai ibrg DrganizationforStandardization Licensee-ZHEJIANG INST OF STANDARDIZzRoISQ6 - All rights reserved Not for Resale, 2016/7/20 08:04:18 networking permited withoutlicense from IHS IS0 6931-1:2016(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Information to be supplied by the purchaser 4 Requirements .2 4.1 Manufacturing process. .2 4.2 Form of delivery. 4.3 Surface finish 2 4.4 Chemical composition .2 4.5 Mechanical properties 3 4.6 Technological properties. ..6 4.6.1 Coiling test. .6 4.6.2 Wrapping test. .6 4.6.3 Simple bend test .6 4.7 Supply conditions of wire on coils/reels and spools .6 4.7.1 General 4.7.2 Coil size, .6 4.7.3 Circular wire cast 4.7.4 Helix cast of wire 7 4.8 Surface quality. .8 4.9 Inner soundness ..8 4.10 Dimensions and dimensional tolerances .8 4.10.1 Tolerances on diameter. .8 4.10.2 Out of roundness. .9 4.10.3 Tolerance on the length of straightened and cut lengths ..9 5 Testing and inspection .9 5.1 Inspection and inspection documents .9 5.2 Extent of testing for specific testing. ..10 5.3 Sampling .12 5.4 Test methods. 12 5.4.1 Chemical composition 12 5.4.2 Tensiletest 12 5.4.3 Coiling test. ..12 5.4.4 Wrapping test. .12 5.4.5 Simple bend test ..12 5.4.6 Reverse torsion test. .12 5.4.7 Wire cast. .13 5.5 Retests ..13 6 Marking and packaging .13 Annex A (informative) Additional information ..14 Bibliography ..19 iii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS