ISO INTERNATIONAL STANDARD 812 Fourth edition 2017-07 Rubber, vulcanized or thermoplastic Determination of low-temperature brittleness Caoutchouc vulcanisé ou thermoplastique Détermination de la fragilité a basse temperature Reference number IS0 812:2017(E) International Organization for Standardization @ IS0 2017 =ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under lic Not for Resale, 2017/9/27 06:03:45 itted without license from IHS IS0 812:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, 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. 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 PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZRoISQ s1.7 - All rights reserved Not for Resale, 2017/9/27 06:03:45 etworking permitted without license from IHS IS0 812:2017(E) Contents Page Foreword ..iv 1 Scope 2 Normative references ..1 3 Terms and definitions 4 Apparatus and materials. ..2 5 Calibration ..4 6 Test pieces ..4 7 Time interval between manufacture and testing 8 Procedure .5 8.1 Procedure A (determination of brittleness temperature) ..5 8.2 Procedure B (determination of 50 % brittleness temperature) .5 8.3 Procedure C (testing at a specified temperature), . 6 9 Precision .7 10 Test report 7 Annex A (informative) Speed calibration of a solenoid-actuated low-temperature impact tester ....8 Annex B (normative) Calibration schedule ..11 Annex C (informative) Precision ..13 Bibliography .15 iii e=ZHEJIANG INST OF STANDARDIZATION C1 5956617 thout license from IHS