2024 (LY12) is a typical hard aluminum alloy in the aluminum copper magnesium series, with a reasonable composition and good overall performance. Many countries produce this alloy, which is the largest amount of hard aluminum used. The characteristics of this alloy are: high strength, certain heat resistance, and can be used as working parts below 150C. The strength of 2024 alloy is higher than that of 7075 alloy when the temperature is above 125 * C. The forming performance of the hot state, annealing, and newly quenched state is relatively good, and the heat treatment strengthening effect is significant, but the heat treatment process requirements are strict. Poor corrosion resistance, but effective protection can be obtained by coating with pure aluminum; 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.