Bronze aluminum containing aluminum alloy 4 15 has high strength, corrosion resistance and hardness close to that of low carbon steel, and has a metallic luster that is not easy to blacken. It is often used in the jewelry and construction industries to make machine parts and pickling tools. Copper-based alloy with aluminum as the main alloying element is an aluminum bronze containing iron and manganese, which belongs to high-strength heat-resistant bronze. Generally, the aluminum content does not exceed 1 1.5%, and sometimes appropriate elements such as iron, nickel and manganese are added to further improve the performance. Aluminum bronze can be strengthened by heat treatment, with higher strength than tin bronze and better oxidation resistance at high temperature. It has high strength and good wear resistance. Used for high-strength wear-resistant parts such as screws, nuts, copper sleeves and sealing rings. The most prominent feature is good wear resistance.