Corrosion resistant alloy

Details Corrosion resistant alloy Corrosion resistant alloy

1989-04-10

1990-04-10

Yee, Deborah

Metal treatment

Stock

Ferrous

148325, 420 57, 420 59, C22C 3844, C22C 3842

Patent

active

049157523

ABSTRACT:
The present invention is directed to air-meltable, castable, workable, weldable duplex alloys of high yield strength as well as high tensile elongations and ductility and which are resistant to chlorides and a wide variety of corrosive chemical streams over a wide range of temperatures and fluid velocities. The alloys consist essentially of, by weight, between 23.8% and 28.5% chromium, from about 3.3% to about 5.6% molybdenum, from about 7.8% to about 11.5% nickel, from about 0.12% to about 0.23% nitrogen, from about 0.8% to about 1.5% copper, up to about 0.8% silicon, up to about 1.2% manganese, and up to about 0.6% tungsten, and the balance essentially iron, wherein the percentage of chromium and molybdenum is within the area ABCA of FIG. 1. Preferred alloys have a narrower percentage range of chromium and molybdenum contents and fall within the area DEFG of FIG. 1.

REFERENCES:
patent: 4032367 (1977-06-01), Richardson et al.
patent: 4500351 (1985-02-01), Bond et al.
patent: 4816085 (1989-03-01), Flasche et al.

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