This study determined the effects of composition, heat treatment, and microstructure on the resistance of INCONEL* alloy 690 to stress-corrosion cracking in caustic. The results were compared with the effects of the same factors on INCONEL alloy 600. Both alloys were evaluated in the annealed condition and after a post-anneal exposure to 704°C (1300°F) for 15 hours. Resistance to SCC was determined by constant-extension-rate tests (CERT) in deaerated 10% sodium hydroxide at 288 to 316°C (550 to 600°F).

Subject
Strain rate, Water, Carbides, Precipitation (solids), Nickel based alloys, Stress cracking, Intergranular cracking, Heat, Phosphoric acid, Sodium hydroxide, Carbon, Alloys, Heat treatment
© 1984 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).
1984
Association for Materials Protection and Performance (AMPP)
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