Ferritic stainless steel

Details Ferritic stainless steel Ferritic stainless steel

1978-07-27

1979-12-18

Steiner, Arthur J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75126F, 75126J, 148 37, C22C 3824, C22C 3826

Patent

active

041792858

ABSTRACT:
A substantially fully ferritic stainless steel having improved hot rolling and cold drawing properties, consisting essentially of from 0.010% to 0.17% carbon, 0.05% to 1.0% manganese, 0.05% to 1.0% silicon, 20.0% to 30.0% chromium, 0.05% to 0.35% nitrogen, 0.15% to 1.0% columbium, up to 0.50% vanadium, up to 0.75% molybdenum, 0.040% maximum phosphorus, 0.030% maximum sulfur, and remainder essentially iron. Columbium carbo-nitrides are distributed as dispersoids in a ferritic matrix and provide a strenghtening effect which prevents scratches, seams and longitudinal folds in hot rolled material and galling and scratches in cold drawn material. Preferably columbium plus vanadium is not more than 4 times carbon plus nitrogen.

REFERENCES:
patent: 1954344 (1934-04-01), Becket et al.
patent: 2624669 (1953-01-01), Crafts
patent: 2965479 (1960-12-01), Evans, Jr.
patent: 3963532 (1976-06-01), Demo, Jr.
patent: 4010049 (1977-03-01), Rarey

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