Ni-Cr-Fe corrosion resistant alloy

Details Ni-Cr-Fe corrosion resistant alloy Ni-Cr-Fe corrosion resistant alloy

1988-08-19

1989-06-06

Rutledge, L. Dewayne

Alloys or metallic compositions

Containing over 50 per cent metal but no base metal

Iron containing

420586, C22C 3002

Patent

active

048369853

ABSTRACT:
The present invention is directed to air-meltable, castable, weldable, machinable alloys of reasonable ductility and resistance to very hot concentrated sulfuric acid as well as to most other more dilute strengths of the acid either in the pure acid-water forms or containing additionally contaminants that might be encountered in practical applications. The alloys consist essentially of between about 36% and about 40.5% by weight nickel, from about 31% to about 33% by weight chromium, from about 4% to about 5.2% by weight molybdenum, from about 2.7% to about 4% by weight copper, from about 2.5% to about 6% by weight silicon, from about 0.40% to about 0.62% by weight nitrogen and the balance essentially iron. The instant alloys may also contain up to about 2% by weight manganese and up to 0.11% by weight carbon.

REFERENCES:
patent: 1115239 (1914-10-01), Parr
patent: 2103855 (1937-12-01), LaBour
patent: 2597495 (1952-05-01), Jackson et al.
patent: 2938786 (1960-05-01), Johnson
patent: 2938787 (1960-05-01), Boyd et al.
patent: 3008822 (1961-11-01), Boyd et al.
patent: 3758296 (1973-07-01), Johnson
patent: 4765957 (1988-08-01), Culling

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