Method of producing pitting resistant, hot-workable austenitic s

Details Method of producing pitting resistant, hot-workable austenitic s Method of producing pitting resistant, hot-workable austenitic s

1976-10-07

1977-08-23

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

148 12E, 148 38, C21D 713

Patent

active

040438384

ABSTRACT:
An austenitic stainless steel alloy which has extremely good pitting resistance and at the same time has good hot-workability characteristics. The alloy contains, as essential constituents, chromium, nickel, molybdenum, calcium and cerium. In achieving the desirable characteristics of the invention, the molybdenum and chromium levels are important in determining pitting resistance; while recoveries of cerium and calcium in the final alloy are important in determining the hot-workability of the alloy, although cerium is the more important of the two. Sulfur levels are preferably maintained low, on the order of 0.006% or less.
Also disclosed is a method for making an alloy of the type described above wherein the finishing temperature of hot-rolled strip is maintained around or above 1800.degree. F to reduce edge cracking and preferably is maintained at about 2000.degree. F.

REFERENCES:
patent: 2553330 (1951-05-01), Post et al.
patent: 3547625 (1970-12-01), Bieber et al.
patent: 3729308 (1973-04-01), Eiselstein
patent: RE24243 (1956-12-01), Lohr

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