ISO INTERNATIONAL STANDARD 7539-5 First edition 1989-12-15 Corrosion of metals and alloys - Stress corrosion testing - Part 5: Preparation and use of C-ring specimens Corrosion des metaux et alliages - Essais de corrosion sous contrainte- Partie5:Preparationetutilisationdeséprouvettesenformed'anneauenC Reference number ISO7539-5:1989(E) ISO 7539-5 : 1989 (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 mental 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. the member bodies for approval before their acceptance as International Standards by the Iso Council. They are approved in accordance with iSO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7539-5 was prepared by Technical Committee ISO/TC 156 Corrosion of metals and alloys. Iso 7539 consists of the following parts, under the general title Corrosion of metals andalloys- Stress corrosiontesting: Part 1: General guidance on testing procedures Part 2: Preparation and use of bent-beam specimens 一 Part 3:Preparation and use of U-bend specimens Part 4: Preparation and use of uniaxially loaded tension specimens 一 Part 5: Preparation and use of C-ring specimens Part 6: Preparation and use of pre-cracked specimens - Part 7: Slow strain rate testing Part 8: Preparation and use of welded specimens Annex A forms an integrai part of this part of iso 7539. @ISO1989 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 Case postale 56 CH-1211 Geneve 20 · Switzerland Printed in Switzerland i ISO 7539-5 : 1989 (E) Introduction This part of Iso 7539 is one of a series giving procedures for designing, preparing and using various forms of test specimen to carry out tests to establish a metals resistance to stress corrosion. Each of the standards in the series needs to be read in association with ISO 7539-1. This helps in the choice of an appropriate test procedure to suit particular circumstances as well as giving guidance towards assessing the significance of the results of the tests.