HWD No. 3 is an air-hardening hot work steel recommended for dies where a minimum amount of distortion during hardening is required. It is equivalent to AISI Type H13. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance as well as forming, heat treating, and joining. Filing Code: TS-72. Producer or source: Firth Sterling Inc..