Explanation of common aluminum alloy properties (I) 2024-LY12 aluminum alloy

2024 (LY12) is a typical hard aluminum alloy in aluminum copper magnesium system. Its composition is reasonable and its comprehensive properties are good. Many countries produce this alloy, which is the largest amount of duralumin.

The alloy is characterized by high strength and certain heat resistance. It can be used as working parts below 150 ° C. When the temperature is higher than 125 ° C, the strength of 2024 alloy is higher than that of 7075 alloy. The formability is better in thermal state, annealing and new quenching state, and the strengthening effect of heat treatment is remarkable, but the requirements of heat treatment process are strict. Poor corrosion resistance, but it can be effectively protected by coating with pure aluminum; Cracks are easy to occur during welding, but special processes can be used for welding or riveting. Good fatigue strength.

It is widely used in aircraft structures, rivets, truck hubs, propeller components and other structural parts. Chemical composition of LY12 alloy aluminum：