11Ni-13Co Maraging Steel (var. 5)

11Ni-13Co Maraging Steel (var. 5) is a ultra-high-strength nickel-cobalt maraging steel, a precipitation-hardened iron-based superalloy engineered to achieve exceptional strength through controlled aging rather than carbon hardening. This variant is used in mission-critical aerospace and defense applications where extreme strength-to-weight ratios and dimensional stability are non-negotiable, such as rocket motor cases, aircraft landing gear, and precision tooling. Engineers select maraging steels over conventional high-carbon steels when toughness and low distortion during heat treatment are equally important as raw strength, making them ideal for large, complex components that cannot tolerate significant warping during manufacture.