0.52C 9.9Cr-1.2Mo-0.6V-3.5Ni Low Alloy Steel

A high-strength martensitic stainless steel combining moderate carbon content (0.52%) with substantial chromium (9.9%), nickel (3.5%), and molybdenum (1.2%) alloying to achieve excellent corrosion resistance alongside high hardness and wear resistance. This composition—notable for its cobalt content (~16%)—is typically used in demanding aerospace, tooling, and precision bearing applications where both strength and corrosion performance must be maintained at elevated temperatures. The balance of elements enables this steel to be hardened to very high strength levels while retaining toughness and dimensional stability, making it a preferred choice for components requiring both hardness and environmental durability.