Hafnium additions to IN 792 improve grain boundary strength, oxide scale adhesion, and resistance to thermal fatigue cracking, extending component life in cyclic high-temperature service. The alloy retains the high creep rupture strength of the IN 792 base while offering improved ductility for complex blade geometries. Qualified under PWA 1456, EMS 73667, and EMS 55450, IN 792 + Hf is used for first-stage turbine blades in aerospace and military gas turbine engines.