1, high strength steel: This material has high yield strength, tensile strength, Brinell hardness and other performance indicators. The weight reduction of vehicles is mainly realized by using the yield strength characteristics of high strength steel. There are two kinds of commonly used high-strength steel, load-bearing high-strength steel and wear-resistant high-strength steel.

2. Aluminum alloy material: This material has good corrosion resistance, good ductility, light weight and long service life. But its price is relatively high, generally used in some parts of the vehicle, but also used in the whole coat, such as the body of the van, the fuel tank of the tanker.

3. Composite materials: carbon fiber, glass fiber and polyurethane are all composite materials. Light weight, high strength, corrosion resistance and easy molding. It can be used not only as the body material of van, but also as the top material of refrigerated truck and insulated truck.

Allowable modification range of freight car

Changing the color of the car body, replacing the car body, changing the length, width and height of the car body and installing the luggage rack are all allowed. However, the size change should not be too big, and it should be reported to the vehicle management office after modification, and it should be reported within 10 days.

Changing the color of the car body, replacing the car body, changing the length, width and height of the car body and installing the luggage rack are all allowed. However, the size change should not be too big, and it should be reported to the vehicle management office after modification, and it should be reported within 10 days.

According to the New Road Traffic Safety Law, if the car change may involve "changing the color of the car body, replacing the engine, replacing the car body or frame", the owner shall apply to the vehicle management office for registration of change within 10 days after the change, and the vehicle management office shall handle relevant procedures for the owner on the day of acceptance, including signing the change on the motor vehicle registration certificate, recovering the driving license, and issuing a new driving license.