CLC 1.2312 is a prehardened mold steel with added sulfur for increased machinability. 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 as well as heat treating, machining, joining, and surface treatment. Filing Code: TS-613. Producer or source: Industeel USA, LLC.