C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/108
C22C 19/05 (2006.01)
Patent
CA 1082494
ABSTRACT A gamma prime strengthened nickel base alloy characterized by good hot corrosion resistance, strength, creep resistance, phase stability and stress rupture life. The alloy consists essentially of, by weight, from 12.0 to 20.0% chromium, from 4.0 to 7.0% titanium, from 1.2 to 3.5% aluminum, from 12.0 to 20.0% cobalt, from 2.0 to 4.0% molybdenum, from 0.5 to 2.5% tungsten, from 0.031 to 0.048% boron, from 0.005 to 0.15% carbon, up to 0.75% manganese, up to 0.5% silicon, up to 1.5% hafnium, up to 0.1% zirconium, up to 1.0% iron, up to 0.2% of rare earth elements that will not lower the incipient melting temperature below the solvus temperature of the gamma prime present in the alloy, up to 0.1% of elements from the group consisting of magnesium, calcium, strontium and barium, up to 6.0% of elements from the group consisting of rhenium and ruthenium, balance essentially nickel. The alloy is substantially free of deleterious acicular, sigma amd mu phases. Although its predominant use is in the wrought form, it can be used in the case or powder form.
293684
George H. Riches And Associates
Special Metals Corporation
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