Steel has always been the main material in automobile manufacturing.But with the society to environmental protection and energy-saving voice increasingly high, the national fuel consumption policy tends to tighten, consumers also put forward higher requirements for vehicle safety, which has forced automakers to seek stronger and lighter vehicle building materials.The use of high-strength steel is .

The demand for the automotive parts is increasing day by day , Parts made of automotive parts aluminum, , such as an engine, an automobile hub, can be well reduced in weight. In addition, the aluminum radiator is 20-40% lighter than the other materials,and the aluminum body is more than 40% lighter than that of the steel body, the fuel consumption can be reduced during the actual operation cycle o.