... Yield Strength≥(255~1330)Extension≥ (7%~24%)Reduction of cross-section≥ (35%~60%)Impact absorbing energy≥ (31~110)Hardness ... vehicle, aircraft, missile,weapons,railways,bridge,pressure vessel, machine tool,gears in gearbox, gear shaft, cam, worm ... kinds of fields,such as aerospace,electronic information, machine manufacture,petrochemical,automotive,communication,transportation and medical instruments, ...