Soldering flux brazing materials most widely used soft solder is tin- lead solder , and its wettability and spreadability with solder tin content increases. The brazing process and economy are good, joint strength is also well positioned to meet the requirements. w (Sn) 95% or more of the solder material is mainly used in the food industry and Stainless Steel Welding Rod, to reduce lead contamination. S-Sn60Pb and S-Sn63Pb lowest melting temperature , has superior process performance, primarily for the electronic device by hand soldering , wave soldering , brazing and melt dip brazing . S-Sn63PbAg reduce silver layer base material corrosion , to improve the solder creep and fatigue properties . S-Pb60Sn and S-Pb60SnSb solder is the most common , widely used in radiators , pipes, electrical connectors , household products, and engine Aluminum Electrode. Cadmium -based solder is best soft solder solder heat resistance , joints withstand temperatures up to 250 ℃, and has good corrosion resistance. Using cadmium -based brazing copper and copper alloys , the interface is easy to form brittle copper cadmium compounds , it is necessary that such rapid heating resistance brazing method