Low carbon plus nitrogen, free-machining austenitic stainless st

Details Low carbon plus nitrogen, free-machining austenitic stainless st Low carbon plus nitrogen, free-machining austenitic stainless st

1985-06-14

1986-09-23

Rutledge, L. Dewayne

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

C22C 3858

Patent

active

046133674

ABSTRACT:
A chromium-nickel austenitic stainless steel having improved machinability resulting from low carbon and nitrogen contents, along with a high manganese to sulfur ratio. The composition of the steel consists essentially of, in weight percent, carbon plus nitrogen up to 0.060, preferably up to 0.049, and most preferred up to 0.032, chromium 16 to 30, preferred 17 to 19, nickel 5 to 26, preferred 6 to 14, sulfur 0.25 to 0.45, manganese over 2 to about 7 and at least about eight times the sulfur content, balance iron and incidental impurities.

REFERENCES:
patent: 3437478 (1969-04-01), Moskowitz et al.
patent: 3888659 (1975-06-01), Ferree, Jr.
patent: 3902898 (1975-09-01), Denhard, Jr. et al.
patent: 4444588 (1984-04-01), Ney
The Making, Shaping and Treating of Steel, United States Steel, Ninth Edition, p. 1282.

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