Armco 440A is a martensitic hardenable, high-carbon, high-chromium stainless steel recommended for cutlery, valve parts, and surgical instruments. It is always used in the hardened condition. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-783. Producer or source: Armco International Sales.