An investigation was conducted to assess several options as alternative testing methodologies which could result in a reduction in the test duration required for sulfide stress cracking (SSC) qualification testing. The options included: (1) Acoustic emission monitoring of standard TM0177, Method A tests, (2) Slow strain rate testing at various extension rates, and (3) Re-analysis of API C-90 round robin SSC test results to define an alternative threshold stress criterion for a reduced testing period. Results of the program indicated that several options were viable methods of reducing the qualification time and still differentiate the behavior of sour versus non-sour service grades and which provided for more rapid evaluation than currently available.

Subject
Test methods, Tubular goods, Materials failure, Materials, Yield stress, Tensile tests, Stress, Mechanical failure, Tensile stress, Steel, Risk reduction, Sulfide stress cracking, Slow strain rate technique
Keywords:
sulfide stress cracking, SSC, slow strain rate, low alloy steel, acoustic emission, AET, test methods, qualification testing, sour service, hydrogen sulfide
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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