18Ni-7Co-3.1Mo-0.8Ti Maraging Steel (var. 2)

18Ni-7Co-3.1Mo-0.8Ti maraging steel is a precipitation-hardened iron-nickel alloy designed to achieve ultra-high strength through controlled aging heat treatment, with cobalt and molybdenum additions enhancing strength development and titanium contributing to the hardening mechanism. This variant is employed in aerospace structures, defense systems, and tooling applications where the combination of very high strength with reasonable toughness and machinability is critical—particularly where conventional high-strength steels would require extensive stress relief or prove too brittle. Engineers select maraging steel when weight reduction and damage tolerance are equally important, avoiding the brittleness of tool steels or the processing difficulty of superalloys in moderately demanding applications.