Oxidation resistant iron base alloys

Details Oxidation resistant iron base alloys Oxidation resistant iron base alloys

C - Chemistry, Metallurgy

22

C

75/106

C22C 38/52 (2006.01) C22C 38/44 (2006.01)

Patent

CA 1073708

ABSTRACT OF THE INVENTION An improved oxidation resistant iron base alloy with reduced heat affected zone cracking is provided consisting essentially of about 0.05 to 0.7% carbon, less than 0.3% columbium, about 15 to 30% cobalt, about 18 to 25% chromium, about 0 to 2% manganese, about 1 to 6% molybdenum, about 0.10 to 0.30% nitrogen, about 15 to 30% nickel, about 0.2 to 0.6% silicon, about 0.1 to 2% tantalum, about 1 to 10% tungsten, about 0 to 0.1% zirconium, about 0 to 0.5% aluminum, about 0 to 0.1% lanthanum and the balance iron > 23% with incidental impurities not exceeding 0.6% in aggregate. The combined % of columbium and tantalum being at least 0.4% and the combined carbon and nitrogen being > 0.2%. The compositions are in percent by weight.

227567

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