Why does the automobile industry gradually use aluminum instead of steel as the automobile body?

The adoption of aluminum alloy car body is determined by its advantages. (1) Economy With the extensive use of aluminum alloy in automobile manufacturing, the total mass of automobiles is reduced, thus reducing fuel consumption; Due to low fuel consumption, light weight, less automobile exhaust emission and reduced pollution. (2) The recycling rate of environmentally-friendly second-hand cars is high, aluminum automobile parts can be basically recycled, the energy required for recycling is less, aluminum can be recycled many times, and the performance changes little. (3) When corrosion-resistant aluminum is exposed to air, it is easy to form a dense oxide layer on the surface to separate aluminum from air and prevent further corrosion by oxygen. (4) that aluminum material with good machinability has good plasticity and rigidity, and the plate with a certain thickness can be use for manufacturing the plate related to the whole vehicle. (5) The aluminum material with good safety has high energy absorption characteristics, and is an ideal material for manufacturing the deformation zone of the car body to enhance the passive safety of the car body.