Phosphor copper (phosphor bronze) (tin bronze) (tin phosphor bronze) is composed of bronze with 0.03-0.35% degasser P and 5-8% Sn and other trace elements such as Fe, Zn, Zn, etc. It has good ductility and fatigue resistance, and its reliability is higher than that of ordinary copper alloy products. Bronze originally refers to copper-tin alloy, and later copper alloys other than brass and white copper are called bronze. Tin bronze has good castability, antifriction and mechanical properties, and is suitable for manufacturing bearings, worm gears and gears. Lead bronze is a widely used bearing material for modern engines and grinders. Aluminum bronze has high strength, good wear resistance and corrosion resistance, and is used for casting high-load gears, shaft sleeves and marine propellers. Beryllium bronze and phosphor bronze have high elastic limit and good conductivity, and are suitable for manufacturing precision springs and electrical contact elements. Beryllium bronze is also used to make spark-free tools used in coal mines and oil depots.