AISI TYPE 440C is a hardenable high-carbon chromium steel designed to provide stainless properties with maximum hardness. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-101. Producer or source: Stainless steel mills. Originally published March 1960, revised June 1988.