Composition (Nominal):
0.05 C, 0.50 Mn, 0.30 Si, 0.015 P, 0.015 S, 5.50 Cr, 25.00 Ni, 29.00 Co, 0.80 Ti, 4.80 Cb, 0.50 Al, 0.50 Cu, 0.01 B, Bal. Fe
Precipitation hardenable superalloy exhibiting a low coefficient of thermal expansion over a broad temperature range, high tensile and rupture strengths, and good thermal fatigue resistance. Offers a significant improvement in environmental resistance over CTX alloys. Excellent combination of tensile properties and stress rupture strength in the recrystallized condition with the use of common solution and age hardening treatments.