Corrosion-resistant nickel-chromium-molybdenum alloys

Details Corrosion-resistant nickel-chromium-molybdenum alloys Corrosion-resistant nickel-chromium-molybdenum alloys

1990-01-26

1991-05-28

Dean, R.

Metal treatment

Compositions

Heat treating

148427, 420442, 420451, 420453, C22F 110

Patent

active

050191845

ABSTRACT:
A homogenizaton heat treatment for enhancing crevice and pitting corrosion resistance minimizes the formation of Mu phase in nickel-base alloys of high combined percentages of chromium, e.g., 19 to 23% and molybdenum, e.g., 14 to 17%, particularly together with tungsten. Also described is an advantageous alloy composition containing less than 2.5% iron, low carbon and a titanium to carbon ratio greater than 1 which is particularly adapted to be effectively treated by the homogenization heat treatment.

REFERENCES:
patent: 3160500 (1964-12-01), Eiselstein et al.
patent: 3203792 (1965-08-01), Scheil et al.
patent: 4080201 (1978-03-01), Hodge et al.
patent: 4168188 (1979-09-01), Asphahani
patent: 4533414 (1985-08-01), Asphahani
W. Z. Friend, "Corrosion of Nickel and Nickel-Base Alloys", pp. 292-367; pub'd by John Wiley & Sons (1980).

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