UNS No. T30402 is an air-hardening high-carbon, high-chromium cold-work die steel that offers excellent wear resistance. It is a deep-hardening steel but hardens with a minimum change in size and volume. Typical uses are cold-work dies, slitting cutters, shear blades and wood-working tools. This datasheet provides information on composition, physical properties, hardness, elasticity, and bend strength as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-341. Producer or source: Tool steel mills.