CLC 1.2311 is a prehardened mold steel optimized for martensite and surface finish quality. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance, and surface qualities as well as heat treating, machining, joining, and surface treatment. Filing Code: TS-611. Producer or source: Industeel USA.