Alumina-forming, high temperature creep resistant Ni-based alloys
An alumina-forming, high temperature creep resistant alloy is composed essentially of, in terms of weight percent: up to 10 Fe, 3.3 to 4.6 Al, 6 to 22 Cr, 0.68 to 0.74 Mn, 5.2 to 6.6 Mo, 0.4 to 1.2 Ti, up to 0.1 Hf, 0.005 to 0.05 La, 0.4 to 0.6 W, 0.1 to 0.35 C, up to 0.002 B, 0.001 to 0.02 N, balance Ni.
1. An alloy consisting essentially of, in terms of weight percent:
Fe 9.4 to 10
Al 3.6 to 4.2
Cr 16 to 17
Mn 0.68 to 0.74
Mo 5.2 to 5.4
Ti 0.45 to 0.5
La 0.005 to 0.05
W 0.4 to 0.6
C 0.1 to 0.35
B up to 0.002
N 0.001 to 0.02
Ni balance, wherein the alloy has Al+Cr of from 9.3 to 26.6.
2. An alloy consisting essentially of, in terms of weight percent:
Fe 1.8 to 2.2
Al 3.3 to 4.0
Cr 17 to 20
Mn 0.68 to 0.74
Mo 6.0 to 6.6
Ti 0.4 to 0.6
Hf 0.06 to 0.1
La 0.005 to 0.05
W 0.4 to 0.6
C 0.1 to 0.35
B up to 0.002
N 0.001 to 0.02
Ni balance, wherein the alloy has Al+Cr of from 9.3 to 26.6.