LUKENS HARDWARE 400F steel was developed from armor steel production technology to have as low a carbon equivalent as possible, consistent with meeting both surface and through-thickness hardness. Uses include truck body liners, bucket lips and conveyor troughs. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on wear resistance as well as forming and joining. Filing Code: SA-475. Producer or source: Lukens Steel Company.