TOOLOX 44 is a member of the Toolox family of quenched and tempered prehardened tool and machine steel, delivered with guaranteed properties. Toolox 44 has a hardness if HRC 45 and is ideal for nitriding. 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-671. Producer or source: International Mold Steel Inc.