Ferritic stainless steel and processing therefor

Details Ferritic stainless steel and processing therefor Ferritic stainless steel and processing therefor

1979-08-01

1981-09-01

Skiff, Peter K.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75124, 75125, 75128G, 148 2, 148 12EA, 148 37, C22C 3826, C22C 3848

Patent

active

042869862

ABSTRACT:
Careful control of chemistry, and in particular niobium, and of annealing temperatures provides a ferritic stainless steel of improved creep strength. Annealing is performed at a temperature of at least 1900.degree. F., and in certain embodiments, at a temperature no higher than 1990.degree. F.

REFERENCES:
patent: 2191790 (1940-02-01), Franks
patent: 2905577 (1959-09-01), Harris et al.
patent: 3499802 (1970-03-01), Lagneborg
patent: 3650731 (1972-03-01), Aggen
patent: 3759705 (1973-09-01), Chalk
patent: 3852063 (1974-12-01), Niimi et al.
patent: 3890143 (1975-06-01), Skoglund et al.
patent: 3926685 (1975-12-01), Gueussier et al.
patent: 4055416 (1977-10-01), Oldrieve
patent: 4059440 (1977-11-01), Takemura et al.
patent: 4087287 (1978-05-01), Dunning et al.
Whittenberger et al., "Elevated Temperature Mechanical Properties and Cyclic Oxidation Resistance of Several Wrought Ferrtic Stainless Steels," Metals Technology, Nov. 1978, pp. 365-371.

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