The application of aluminum material in rail transit improves the effective load of rail trains, saves fuel and reduces the maintenance cost of vehicles. Due to the weight reduction, rail trains have good adaptability to high-speed, multi-bend, undulating routes and harsh environments, and their operation is easier to control and more stable. Under normal circumstances, high-speed trains with a speed of more than 250 kilometers per hour are made of aluminum alloy. For example, China""s CRH series of high-speed rail are basically made of aluminum alloy.

Aluminum alloy materials are widely used in rail transit, which can be used to make car bodies such as roofs, side walls, floors, etc., as well as small accessories such as luggage racks, doors, pedals, water tanks, etc. In order to reduce the dead weight of the car body and the effective degree of sealing of the chartered car body, all the train cars larger than 350km/h use aluminum profiles except the chassis; The aluminum alloy car body used in urban rail passenger cars is not only lightweight, but also has the characteristics of sealed spacing, corrosion resistance and beauty. At present, the weight of high-speed rail aluminum alloy car body is 8.5-10 tons/car, and the aluminum alloy material used for interior decoration is about 1 ton/car.