Stainless steel

Details Stainless steel Stainless steel

1983-11-21

1985-06-18

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75126F, 75128A, 75128G, C22C 3804

Patent

active

045239517

ABSTRACT:
The present invention relates to a fully austenitic, nonmagnetic stainless steel which maintains the carbon concentration of the final steel near the solubility limit for carbon in the steel and adds columbium in an amount sufficient to stabilize the steel by columbium's preferential scavenging of carbon over chromium. This preferential scavenging substantially eliminates chromium carbide formation at grain boundaries in the solid solution of the final stainless steel product. A highly preferred stainless steel consists essentially of, by weight:

REFERENCES:
patent: 2405666 (1946-08-01), Norwood
patent: 4000984 (1977-01-01), Baumel
patent: 4162930 (1979-07-01), Abe et al.
Perry's Chemical Engineers' Handbook, 5th Ed., (1973), pp. 23-14 and 23-15.
Steiner et al., Metal Progress, Grain Boundary Carbides In Extra-Low-Carbon Stainless, 7-57, pp. 108-110.

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