LUKENS 80 is a heat treated low carbon, high manganese constructional steel with a minimum yield strength of 80,000 psi. It is recommended for heavy construction equipment. It has satisfactory toughness down to -250 F and good weldability. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-25. Producer or source: Lukens Steel Company.