Phosphor bronze is the alloy of copper, tin and phosphorus. It is hard and solid and can make torsion spring. A copper alloy with a small amount of phosphorus remaining in the oxygen of copper and brass (Cu-Sn) by phosphorus removal and the addition of 1% phosphorus to improve mechanical properties (toughness, elasticity, wear resistance, corrosion resistance). The key is used as anti-wear parts and elastic components. Computer connectors, mobile phone connectors, high-tech industry connectors, electronic and electrical torsion springs, switches, electronic product slots, buttons, electrical connectors, lead frame, vibration pieces and terminals.

Phosphorus is a good deoxidizer for copper alloy, which can improve the fluidity of the alloy, improve the process and mechanical properties of tin bronze. The solubility of phosphorus in tin bronze is 0.15%, too much phosphorus will produce a+δ+Cu3P ternary eutectic, the dissolution point is 628℃, hot binding is easy to produce hot brittle, can only cold drawing. Therefore, the phosphorus content in the deformed phosphor bronze should not exceed 0.5%, and the phosphorus content should be less than 0.25% during heat treatment.

Brass having tin as its main alloying element. Tin content is generally between 3 ~ 14%, mainly used for making elastic components and anti-wear parts. The tin content of deformed tin bronze is not more than 8%, and sometimes phosphorus, lead, zinc and other elements are added. Phosphorus is a better deoxidizer and can improve fluidity and wear resistance. The cutting and wear resistance of tin bronze can be improved by adding lead, and the casting performance can be improved by adding zinc. These alloys have high mechanical properties, abrasion resistance, easy cutting, good fiber welding and welding performance, small shrinkage coefficient and no magnetic band. Brass bushing, bushing, anti-magnetic components and other coatings can be prepared by cable flame spraying and arc spraying. The size of Ф1.6mm, Ф2.3mm. It has high strength, corrosion resistance and good casting performance, and has been widely used in various industrial sectors.