11Ni-13Co Maraging Steel (var. 8)

11Ni-13Co Maraging Steel (var. 8) is a precipitation-hardening iron-nickel-cobalt alloy engineered to achieve very high strength through age-hardening after solution treatment and quenching, without significant brittleness. This variant is used in aerospace and defense applications where extreme strength-to-weight ratios and dimensional stability are critical, such as rocket motor cases, landing gear, and precision tooling; it offers superior performance compared to conventional high-strength steels by combining very high strength levels with reasonable toughness and fatigue resistance. The material's low carbon content and nickel-cobalt-molybdenum matrix enable the controlled precipitation hardening mechanism, making it particularly valuable where welding or machining of high-strength components is required without embrittlement concerns.