The 3*** series alloy, which is widely used in the manufacture of aerospace vehicles, is 3A21, which is a heat-treated non-reinforced aluminum alloy. Its strength is not high, but it is higher than that of the 1*** alloy. Cold deformation can make strength. Some of them are improved in the annealed state and can be processed into various semi-finished products -
3A21 aviation aluminum alloy plate, coil, foil, tube, rod, profiles, wires, etc., as well as forgings and die forgings. 3A21 alloy has good weldability, especially excellent friction stir welding performance, easy gas welding, hydrogen atom welding and contact welding; has high corrosion resistance, comparable to 1*** alloy; machinable ability is poor.
3A21 aviation aluminum alloy plate coil rod are used in the manufacture of aircraft mailboxes, gasoline and lubricant conduits, cold stampings, rivets and parts with low forces.
