0.05C 8.3Cr-1.8Mo-11.7Ni Low Alloy Steel (var. 2)

A precipitation-hardening martensitic stainless steel with ~8.3% chromium, ~11.7% nickel, and ~1.8% molybdenum, designed to achieve high strength through controlled aging. This composition sits in the low-carbon, high-nickel regime typical of 300M-class or maraging-derivative steels, offering a balance of corrosion resistance and strength without requiring extreme alloy loadings. Common applications include aerospace fasteners, landing gear components, and high-strength structural parts where both fatigue resistance and modest corrosion environments are concerns; it is chosen over simpler carbon steels when weight savings and over-simple stainless grades when higher strength and fracture toughness are non-negotiable.