ISO/TS TECHNICAL SPECIFICATION 7705 First edition 2017-07 Guidelines for specifying Charpy V-notch impact prescriptions in steel specifications Lignes directrices pour la spécification des prescriptions d'énergie de rupture sur éprouvette Charpy a entaille en V dans les normes d'acier Reference number IS0/TS 7705:2017(E) International Organization for Standardization @ IS0 2017 ee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 nitted without license from IHS IS0/TS 7705:2017(E) COPYRIGHT PROTECTEDDOCUMENT Is02017,PublishedinSwitzerland 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. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Licensee-ZHEJIANG INST OF STANDARDIzRoISQ 7 - All rights reserved ded by IHS unde Not for Resale, 2017/9/27 05:31:49 networking permited without license from IHS IS0/TS 7705:2017(E) Contents Page Foreword ..iv 1 Scope 1 2 Normative references .1 3 Terms and definitions ..1 4 General features of Charpy V-notch impact test. .1 4.1 Toughness testing methods in design codes and in steel specifications 1 4.2 Historical background to the Charpy V-notch impact test 1 4.3 The Charpy V-notch impact test in relation to other tests 2 4.4 Factors influencing impact properties 2 4.5 The Charpy V-notch impact test as a powerful tool for delivery control in steelspecifications. 3 5 Information to be gained from the impact test .3 6 Subsize test pieces .6 7 Recommendations for specifying impact strength requirements in steel specification.. 7.1 Selection and preparation of samples and test pieces. 7.1.1 Selection and preparation of samples.. 7 7.1.2 Cutting and machining 7 7.2 Number of test pieces to be taken per sample and specific requirements 7 7.3 Locationoftestpieces 7 7.4 Interpretation of test results. .8 Bibliography 9 ii nSee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 thout license from IHS Not for Resale, 2017/9/27 05:31:49