Nitrogen strengthened FE-NI-CR alloy

Alloys or metallic compositions – Containing over 50 per cent metal but no base metal – Iron containing

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420586, 4205861, 420 53, 420 51, 420 43, C22C 3850, C22C 3000

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049816470

ABSTRACT:
A corrosion resistant metal alloy having improved formability and workability is disclosed which alloy contains in weight percent about 25% to 45% nickel, about 12% to 32% chromium, of at least one of 0.1% to 2.0% columbium, 0.2% to 4.0% tantalum, and 0.05% to 1.0% vanadium, up to about 0.20% carbon, about 0.05% to 0.50% nitrogen, about 0.001% to 0.02% boron and the balance being iron plus impurities and wherein the carbon and nitrogen content are controlled so that the amount of free carbon and nitrogen defined as ##EQU1## is greater than 0.14% and less than 0.29%. The alloy may also include in limited amounts one of aluminum, titanium, silicon, manganese, cobalt, molybdenum, tungsten, zirconium, yttrium, cerium and other rare earth metals.

REFERENCES:
patent: 4853185 (1989-08-01), Rothman et al.

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