Corrosion resistant Ni- Cr- Si- Cu alloys

Details Corrosion resistant Ni- Cr- Si- Cu alloys Corrosion resistant Ni- Cr- Si- Cu alloys

1989-11-17

1991-11-05

Dean, R.

Alloys or metallic compositions

Nickel base

Chromium containing

420445, 420446, 420448, 420450, 420451, 420453, 420454, C22C 1905

Patent

active

050630237

ABSTRACT:
Disclosed is a nickel-base alloy for use under "super oxidizing" environments, for example, concentrated sulfuric acid, fuming nitric acid, chromium acid and mixtures containing chromic acid. The alloy has good strength and may be precipitation hardened. Its thermal stability and weldability are excellent. The alloy has a high degree of resistance to pitting. A nominal composition contains, in percent by weight, about 20 chromium, about 2 copper, about 2 iron, about 2 molybdenum, about 5 silicon and the balance nickel plus normal impurities.

REFERENCES:
patent: 2103855 (1937-12-01), La Bour
patent: 2821474 (1958-01-01), Steinbuch
patent: 2938786 (1960-05-01), Johnson
patent: 3758296 (1973-09-01), Johnson
patent: 4033767 (1977-07-01), Johnson
patent: 4836985 (1989-06-01), Culling

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