15Ni-9Co-3.0Mo Maraging Steel (var. 2)

15Ni-9Co-3.0Mo maraging steel is an iron-nickel age-hardening alloy strengthened through precipitation of intermetallic phases rather than carbon, enabling an unusually favorable combination of very high strength with good toughness and ductility. This variant is employed in aerospace, defense, and precision tooling applications where components must withstand extreme loads while maintaining dimensional stability and resistance to brittle failure—such as landing gear, rocket motor cases, and high-performance dies—and is preferred over conventional quenched-and-tempered steels when weight reduction and damage tolerance are critical design drivers.