Aluminum train is light in weight, corrosion-resistant and has good running performance. The aluminum plate is mainly used for the outer plate, roof plate, floor, interior decorative plate and other parts of the rail car. At the same time, some small aluminum tubes are also used for ventilation and transmission inside the car body. For the aluminum alloy plate produced by rail transit, it has the advantages of high strength, good extrusion, good weldability, good corrosion resistance, etc., especially suitable for the use of aluminum train body, underframe and frame, which can reduce the weight of the body while ensuring the strength of the body, effectively save energy and reduce operation and maintenance costs. The typical alloys are 5083, 5A06, 6082, 7020, 7N01, etc.