An experimental program was carried out to develop a procedure which will reliably assess the stress-corrosion cracking susceptibility of a given line pipe steel. The commonly used test methods such as slow strain rate and precracked specimen testing have been found to be deficient for this purpose because they are severe test methods which do not approximate service conditions or discriminate between similar steels. On the other hand, constant load or constant displacement tests are more discriminatory but are time consuming and expensive. Previous studies performed at Battelle and the University of Newcastle have shown that a dead-weight loaded test, performed on a tapered tensile test specimen, with an imposed cyclic load is a promising technique for evaluating stress-corrosion cracking susceptibility However, the optimum stress ranges (∆σ), frequencies and test times had not been identified. In this experimental program, tests were performed on three line pipe steels (two X-52's and one X-60) over a range of stress amplitude, frequency, and test times to identify the optimum values for these parameters.

Subject
Test methods, Materials, Piping, Yield stress, Stress cracking, Stress, Crack depth, Crack velocity, Specimen preparation, Steel, Cracks, Stress corrosion cracking, Slow strain rate technique
© 1986 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1986
Association for Materials Protection and Performance (AMPP)
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