Performance of MONEL Alloy 400 in Feedwater Heaters

[+] Author and Article Information
D. W. Rahoi, R. C. Scarberry, J. R. Crum, P. E. Morris

Huntington Alloy Products Division, The International Nickel Company, Inc., Huntington, W. Va.

J. Eng. Power 95(1), 27-35 (Jan 01, 1973) (9 pages) doi:10.1115/1.3445691 History: Received January 14, 1972; Online July 14, 2010


With access to data on more than thirty years service experience with MONEL alloy 400 tubing in high-pressure feedwater heaters, the Huntington Alloy Products Division conducted an extensive laboratory investigation on mechanisms and corrodents contributing to stress-corrosion cracking in this application. A mechanism by which copper-nickel and nickel-copper alloys fail through stress-corrosion cracking is proposed. Changes in manufacturing procedures make it possible to achieve material highly resistant to failure by this mechanism.

Copyright © 1973 by ASME
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