0.05C 5.8Cr-1.7Mo-12.4Ni Low Alloy Steel

This is a precipitation-hardened maraging steel—a low-carbon, high-nickel alloy designed to achieve very high strength through age-hardening rather than carbon-based hardening. The composition combines ~6% chromium, ~1.7% molybdenum, and ~12% nickel with small additions of titanium and aluminum to enable precipitation of intermetallic phases, producing an exceptionally strong but still somewhat ductile steel. This alloy family is primarily used in aerospace and defense applications where extreme strength-to-weight ratio and dimensional stability are critical, particularly in landing gear, pressure vessels, and high-performance structural components that operate in demanding thermal and mechanical environments.