Double Six Super is a high-carbon high-chromium air hardening tool steel having excellent non-deforming characteristics. It is recommended for blanking and thread rolling dies, drawing and coining dies, gauges and mandrels. This datasheet provides information on composition, hardness, tensile properties, and compressive strength as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-205. Producer or source: Edgar Allen & Company Ltd, Imperial Steel Works.