Composition-based correlations to predict the relative sensitization resistance of Types 304 and 316 stainless steel (SS) have been evaluated by comparison to a large data base. The best fit to experimental data was achieved using a slightly modified version of Cihal’s elemental parameters:
where Cr* is the composite chromium concentration, and all concentrations are expressed as weight percentages. This composite chromium term effectively normalizes the effects of the major alloying elements on sensitization resistance. Attempts to add other alloying elements such as manganese, silicon, and nitrogen to the equation did not improve the correlation to the data base. Quantitative degree-of-sensitization (DOS) measurements were made on 14 heats of Types 304 and 316 SS after various isothermal heat treatments using the EPR technique. Comparisons among these heats were found to be consistent with the proposed composite chromium formulism.
Subject
Materials, Intergranular stress corrosion cracking, Composition, Correlation, Chromium, Experimental data, Composites, Heat, Sensitization, Carbon, Elements, Annealing, Heat treatment
© 1985 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).
1985
Association for Materials Protection and Performance (AMPP)
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