C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
148/10, 75/102
C22C 38/44 (2006.01) C21D 7/13 (2006.01) C21D 8/02 (2006.01)
Patent
CA 1058425
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 impor- tant of the two. Sulfur levels are preferably maintained low, on the order of .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°F to reduce edge cracking and preferably is maintained at about 2000°F.
250961
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