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Stress corrosion cracking evaluation of martensitic precipitation hardening stainless steelsThe resistance of the martensitic precipitation hardening stainless steels PH13-8Mo, 15-5PH, and 17-4PH to stress corrosion cracking was investigated. Round tensile and c-ring type specimens taken from several heats of the three alloys were stressed up to 100 percent of their yield strengths and exposed to alternate immersion in salt water, to salt spray, and to a seacoast environment. The results indicate that 15-5PH is highly resistant to stress corrosion cracking in conditions H1000 and H1050 and is moderately resistant in condition H900. The stress corrosion cracking resistance of PH13-8Mo and 17-4PH stainless steels in conditions H1000 and H1050 was sensitive to mill heats and ranged from low to high among the several heats included in the tests. Based on a comparison with data from seacoast environmental tests, it is apparent that alternate immersion in 3.5 percent salt water is not a suitable medium for accelerated stress corrosion testing of these pH stainless steels.
Document ID
19800007882
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Humphries, T. S. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Nelson, E. E. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1980
Subject Category
Metallic Materials
Report/Patent Number
NASA-TM-78257
Accession Number
80N16142
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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