Böhler W302 Superior is a premium grade H13. The term SUPERIOR refers to Böhler’s unique processing method, which includes electro-slag remelting (ESR) to obtain steel with superior mechanical properties. This datasheet provides information on composition, physical properties, and elasticity as well as fracture toughness. It also includes information on heat treating, machining, and joining. Filing Code: TS-699. Producer or source: Böhler-Uddeholm North America.