Lead-free solder wire is a low melt solder with a melting point of 217°C-227°C and a wire diameter of 0.8MM. Soldering wire contains rosin, low solder joints, easy to tin, good fluidity, more reliable soldering, good wettability, strong expansion ability, and effectively prevent bridging and sharpening. The practical ability to remove the oxide film, form a protective film on the surface of the solder joint after welding, slow down the oxidation reaction of the solder joint, and keep the solder joint bright. Widely used in electronic products.