17Ni-8Co Maraging Steel

17Ni-8Co maraging steel is a precipitation-hardened iron-nickel alloy engineered for ultra-high strength with retained toughness, achieved through aging heat treatment of a low-carbon martensitic matrix. This material is primarily used in aerospace and defense applications where weight savings and exceptional strength-to-weight ratio are critical, including missile casings, aircraft landing gear, and rocket motor cases; it is also employed in tooling and die applications where wear resistance and fatigue strength are essential. The cobalt and vanadium additions enhance strength and hardening response compared to standard 18Ni maraging grades, making this variant particularly attractive when maximum performance density is needed despite higher material and processing costs.