DEVELOPMENT OF A HIGH STRENGTH STAINLESS STEEL WITH IMPROVED TOUGHNESS AND DUCTILITY,

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Abstract:

Compositional modifications were made to the existing Cr-Mo-Co stainless steels to produce a steel alloy B which combines the high strength of AFC 77 with the toughness of AFC 260. This was achieved by utilizing both the strengthening effect of grain refinement and the crack stopping ability of retained austenite. After tempering at 800-900F alloy B possesses higher uniform elongation than other high strength stainless steels due to the ease with which its retained austenite transforms under stress to martensite to delay necking. An explanation is advanced for the anomalously low tensile yield strength that occurs in both alloy B and AFC 77 after tempering at 1000F. Author

Author(s):
Webster, D.
Author Organization(s):
BOEING CO RENTON WASH COMMERCIAL AIRPLANE DIV
Pagination:
0038

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
D6-25443
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*STAINLESS STEEL, MECHANICAL PROPERTIES), AUSTENITE, CHROMIUM ALLOYS, MOLYBDENUM ALLOYS, COBALT ALLOYS, HEAT TREATMENT, GRAIN SIZE
Field(s)/Group(s):
Metallurgy and Metallography
Keyword(s):
*HIGH STRENGTH ALLOYS, *STEEL, STEEL AFC 77
Report Date:
1970 Sep 15