Copper tin alloy has tensile strength and good bending performance. Due to tin being a low melting point metal, it is difficult to add and melt. Our company adopts a special melting and casting technology, and the copper liquid undergoes a filtering process to prevent the invasion of impurity elements, ensuring the purity, stability, and consistency of the chemical composition and structural properties of the product; And the subsequent process adopts a reasonable heat treatment process, and the wire has good stretchability (with a continuous drawing of 0.020mm), greatly reducing the breakage rate of drawn ultrafine wire. The surface of copper tin alloy wire can be coated with protective or solderable silver, tin, and other coatings.