2017 is a typical hard aluminum alloy in the aluminum copper magnesium system, with reasonable composition and good overall performance. Many of them produce this alloy, which is used in larger amounts in hard aluminum. The characteristics of this alloy are: high strength, certain heat resistance, and can be used as working parts below 150 ° C. When the temperature is above 125 ° C, the strength of alloy 2017 is higher than that of alloy 7075. The forming performance is relatively good in the hot state, annealing, and newly quenched state, and the heat treatment strengthening effect is significant, but the heat treatment process requirements are strict. Poor corrosion resistance, but coating with pure aluminum can provide effective protection; Cracks are prone to occur during welding, but special processes can be used for welding or riveting. Widely used in aircraft structures, rivets, truck hubs, propeller components, and various other structural components.