The most important lightweight vehicle’s measureis to use lightweight materials replace the traditional steel parts. 

Thetypical light materials are aluminum alloy, magnesium alloy, titanium alloy andplastic, etc. At present, the large 

scale productionprocess of magnesium alloy is not mature, titanium alloy is expensive, plasticparts in China's aut-

omotive industry is still in the initial stage ofapplication. So aluminum alloy part is undoubtedly become the most

mature inlightweight vehicle. Aluminum alloy material has a series excellent performance;low density, so the body 

of the vehicle is light; corrosion resistance, so theycan not to be painted; with the advantage of beautiful, durable,

easy to shape, recyclable, energy saving and so on, it is widely used in various sectors ofindustrial production, 

especially in the vehicle industry.

For example, 76% of aluminum castings and 77%of aluminum die castings for automotive castings in Japan. 

Aluminum alloycastings are mainly used in engine cylinder blocks, cylinder heads, pistons,intake manifolds, 

rocker arms, engine mounts, air compressor links, actuatorhousings, clutch housings, wheels, brake parts, 

handles, cover shell parts andso on. Aluminum alloy parts have become the first choice for the vehicleind-

ustry. According to the US metal market statistics, the average aluminumamount of per vehicle in the world 

has increased 10 times in recently 10 years;it has reached 130Kg per vehicle.

In the next few years, with the continuousgrowth of China's economy, the acceleration of urbanization process, 

thecontinuous improvement of residents' consumption and the arrival of a new roundin vehicle replacement 

demand. It is predicted that domestic vehicle productionis expected to reach 30 million in 2020. Growth rate is 

about 10%.