Patent ID: 8876989

Claim:
A nickel base superalloy composition consisting of, in percentages by weight: 5-8 Cr; 6.5-9 Co; 1.5-2.0 Mo; 6.0-6.5 W; 6.0-7.0 Ta; 6.0-6.4 Al; 1 to 1.5 Re; 0.6 to 0.7 Hf; 0.03 to 1.5 C; 0.004 to 0.015 B; if present, up to 0.03 total of a rare earth selected from Y, La, and Ce, and mixtures thereof; the balance being nickel and incidental impurities; wherein the superalloy composition exhibits creep rupture strength properties of at least 275 hours at a temperature of about 1600° F. (871° C.) and a cyclic load of about 70 ksi (483 MPa); wherein the superalloy composition exhibits creep rupture strength properties of at least 240 hours at a temperature of about 2100° F. (1149° C.) and a cyclic load of about 10 ksi (69 MPa); wherein the superalloy composition exhibits sustained-peak low cycle fatigue (SPLCF) properties of at least 6200 cycles at a temperature of about 2000° F. (1093° C.) and a cyclic load of about 22 ksi (152 MPa); wherein the superalloy composition exhibits sustained-peak low cycle fatigue (SPLCF) properties of at least 2700 cycles at a temperature of about 2000° F. (1093° C.) and a cyclic load of about 30 ksi (207 MPa); wherein an Re ratio defined as the weight % of Re relative to the total of the weight % of W and the wt % of Mo, is less than 0.27.