Countries around the world have told train materials to develop from ordinary steel/weathering steel to stainless steel/aluminum alloy and fiber reinforced plastic, ordinary steel vehicles, stainless steel vehicles, and aluminum alloy vehicles. The weight ratio of the body metal structure has reached 10:7:5. At present, the main materials of the world high-speed train body are mainly aluminum alloy and stainless steel. Ordinary steel materials have been gradually eliminated. Aluminum alloys are used more in Europe and Japan, while the United States is mainly used in trucks. With the development and application of vehicle design technology, the structure of rail transit vehicles has been continuously optimized. The vehicles assembled with large-scale extruded aluminum profiles have been driven by the thin-walled hollow and many cross-members have been reduced, which has led to the development of aluminum alloy vehicles. Development and application of rail transit aluminum profiles.

In order to meet the total performance requirements of the car body toughness / weldability / processability and three-dimensional bending forming, 5083, 6005, 6082, 7N01 alloy is usually used. The most used Japanese aluminum alloy body is the 7N01 (7005) aluminum alloy, which is used as a medium-strength structural material. 7N01 aluminum alloy profiles are mainly used for end beams, bases, rafts, car bodies, end walls, etc.
The car body is mostly made of aluminum alloy profiles, the car is mostly made of aluminum alloy, and the magnetic suspension car body must be made of aluminum. In the construction of light rail/subway/station and auxiliary facilities, a certain amount of aluminum is also needed. Among the required aluminum materials, extruded aluminum is the main material, and the total amount of aluminum used is about 76%.

Transportation tool decoration or structure profiles