Fermalloy(Fe-Mn-Al stainless steel)

Details Fermalloy(Fe-Mn-Al stainless steel) Fermalloy(Fe-Mn-Al stainless steel)

1982-04-12

1983-08-16

O'Keefe, Veronica

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22C 3902, C22C 3710

Patent

active

043989519

ABSTRACT:
The invention provides corrosion-oxidation resistant alloys based on iron, using aluminum (usually about 4 to about 9% by weight) as the element which prevents corrosion/oxidation, and manganese (usually about 3 to about 15% by weight) and containing from 0 to about 6% chromium. The alloys are referred to collectively as "Fermalloys". The invention provides alloys with high ductility at working temperatures and reasonable malleability at room temperature. Some scale deterioration that may occur on these rather simple alloys can be eliminated using minor additions of rare earth elements and some degree of high temperature strengthening may also be possible by the addition of carbon to form carbides.

REFERENCES:
patent: 1850953 (1932-03-01), Armstrong
patent: 3684493 (1972-08-01), Kubota et al.
patent: 3690870 (1972-09-01), Williams
patent: 3698964 (1972-10-01), Caule et al.
patent: 3754898 (1973-08-01), McGurty
patent: 3852063 (1974-12-01), Niimi et al.

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