Sulfidation resistant nick-iron base alloy

Details Sulfidation resistant nick-iron base alloy Sulfidation resistant nick-iron base alloy

C - Chemistry, Metallurgy

22

C

75/113

C22C 19/05 (2006.01)

Patent

CA 1166875

ABSTRACT A sulfidation-resistant alloy containing about 0.02-0.08 w/o carbon, 21-24.5 w/o chromium, 52-60 w/o nickel, 1-3.5 w/o molybdenum, 1.75-3.25 w/o titanium, 0.75-2.25 w/o aluminum, 0.50-2 w/o columbium, up to 0.02 w/o boron and the balance iron, the elements being balanced to provide an average electron-vacancy number Nv not greater than 2.54. When so balanced, the alloy is stabilized against the formation of no more than 10 v/o Cr-rich alpha phase. Preferably, the elements are balanced so that NV is not greater than 2.45 and better yet not greater than 2.40.

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