1. 6063 Mg-Si alloy is formulated as the main alloying element, the content of each element has a certain range, the high price of magnesium.

2. 6061-T6 aerospace called duralumin, light weight, high strength, high production costs, so expensive. Is abbreviated 6061 T6 aluminum aviation, have good formability, weld ability and machinability, also has moderate intensity, after annealing can be maintained better maneuverability. Typical uses aviation fixtures, trucks, tower buildings, ships, pipelines and other applications need to have strength, weld ability and corrosion resistance of the building on areas. Chemical composition range 0.4-0.8Si, 0.70Femax, 0.15-0.40Cu, 0.15Mnmax, 0.80-1.20Mg, 0.04-0.35Cr, 0.25Znmax, 0.15Timax, the highest content of each component of other 0.05, the total amount of other ingredients maximum 0.15, the balance being Al.