Parts that make up a car body can be roughly sorted into four categories: outer panel parts, structural parts, chassis running parts and reinforcement parts. Each category serves distinct functional demands and requires unique mechanical properties.
A vehicle body is mainly assembled with four types of components: exterior panel parts, body structural parts, chassis moving parts and reinforcing parts. These components are designed for different usage scenarios, so they come with different mechanical properties.
Steel materials for exterior body panels shall feature great formability, tensile performance, ductility, dent resistance and corrosion resistance.
Body structural parts need steel that boasts qualified formability, high structural strength, good crash energy absorption performance, stable fatigue resistance, corrosion resistance and fine weldability.
For chassis moving parts, the matched steel plates are required to have decent formability, firm rigidity, steady fatigue durability, corrosion resistance and good welding performance.
As for body reinforcing parts, crash energy absorption capability and stable weldability are the two most essential properties of the adopted steel materials.
