ALLEGHENY LUDLUM 440C is a general purpose, hardenable high-carbon chromium steel designed to provide stainless properties with maximum hardness and high strength. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-93. Producer or source: Allegheny Ludlum Corporation.