The stress corrosion cracking (SCC) susceptibility of sensitized austenitic stainless steels, mainly Type 304 SS, was investigated in oxygenated high purity water and borated water below 240° C. Mainly uniaxial constant load tests were performed on specimens under creviced and uncreviced coniditions, and the results were compared with those of creviced constant deflection tests (double U-bend and creviced bent beam specimens). The results were consistent with each other under creviced conditions, and also no difference was observed with the results in high purity water and borated water. A drastic reduction in time to failure and lower critical stress for SCC was observed under creviced constant load tests at 240° C, and the influence of crevice from the environmental viewpoint for SCC was discussed. The effects of temperature, stress, materials, and SCC test methods were also discussed.

Subject
Constant load, Water, Materials, Intergranular stress corrosion cracking, High purity water, Stress, Constants, Crevices, Mechanical failure, Deflection, Stainless steel, Corrosion potential, Stress corrosion cracking
Keywords:
SCC, stainless steel, sensitization, oxygenated water, high purity water, high temperature water, SCC test methods, uniaxial constant load test, crevice
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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