Why is the car frame made of steel and the fender plastic?
Cost, weight, and plastic parts are not easily damaged by water, and recoil is better than metal!
Fenders are used to block rainy days, mud splashes onto the car, and the use of plastics has two points:To reduce noise, if the splash plate, above will produce noise, plastic material will greatly reduce the abnormal soundSteel is easy to rust and rainy days need to be cleaned. It's too much trouble to use plasticPlastic material is also cheaper
Impact easily deformation, weight greater than plastic material, the price is expensive, and now the plastic material is no more brittle than metal
