TOOLOX 33 is a member of the Toolox family of quenched-and-tempered prehardened tool and machine steel, delivered with guaranteed properties. Toolox 33 has a through hardness of HBW 300. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-670. Producer or source: International Mold Steel Inc.