The Susceptibility of Six Stainless Steels to Stress Corrosion at Ambient and Elevated Temperatures
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER
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The susceptibility of six stainless steels to stress corrosion has been determined by exposing self-stressed specimens indoors and outdoors at ambient temperatures and also at 550 F 56l K. The salt-coated stainless steels were resistant to stress corrosion cracking at 550 F 56l K for exposures from 4000 to 10,000 hours. Specimens of AM-350 DA and AM-367 stainless steel were found to be very susceptible to stress-corrosion cracking with exposures less than 5000 hours in both the indoor with a salt coating and outdoor with and without a salt coating environments, while the AM-350 CRT, AISI 501, PH l5-7 Mo, and PH 14-8 Mo displayed excellent resistance. In general, the stainless steels with higher austenite contents appeared to have better resistance to the corrosive effects of salt, both at rooni temperature and at 550 F 56l K.
- Laminates and Composite Materials
- Metallurgy and Metallography