2024 is a high-strength aluminum-copper alloy known as aviation hard aluminum. It features excellent machinability, high fatigue resistance, and good mechanical properties at room temperature. With moderate ductility and heat-treatable performance, it is widely used in high-stress structural components. It has stable dimensional accuracy and reliable load-bearing capacity, though its corrosion resistance is relatively low and often requires surface protection. Ideal for applications demanding high strength and light weight.