ISO INTERNATIONAL STANDARD 7539-3 First edition 1989-12-01 Corrosion of metals and alloys. - Stress corrosion testing Part 3: Preparation and use of U-bend specimens Corrosiondesmetauxetalliages Essaisdecorrosionsouscontrainte Partie 3: Preparation et utilisation des eprouvettes cintrees en U Referencenumber ISO 7539-3 : 1989 (E) or Standardizatiol No reproduction or networking permitted without license from IHS Not for Resale ISO7539-3:1989 (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 forwhich atechnical committeehasbeenestablished has the right to be represented on that committee. International organizations,govern- 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 mattersofelectrotechnicalstandardization. Draft International Standards adopted by the technical committees are circulated to 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 7539-3 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 and alloys - Stress corrosion testing: Part 1: General guidance on testing procedures Part2:Preparation anduseofbent-beamspecimens Part 3: Preparation and use of U-bend specimens Part 4: Preparation and use of uniaxially loaded tension specimens Part5:PreparationanduseofC-ringspecimens --Part 6: Preparation and use of pre-cracked specimens Part 7: Slow strain rate testing Part 8: Preparation and use of welded specimens ?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. International Organizationfor Standardization Case postale 56 . CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii ing permitted without license from IHS Not for Resale ISO 7539-3 : 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. Eachofthestandardsintheseriesneedstoberead inassociationwithISO7539-1. This helps in the choice of an appropriate test procedure to suit particular cir- cumstances as well as giving guidance towards assessing the significance of the results of the tests. Copyright InternationalOrganization for Standardization No reproduction or networking permitted without license from IHS Not for Resale