... Tin,Silver-Copper-Zinc-Cd,Copper-Zinc,Aluminum base copper welding rods / brazing rods / solder rodsPhos-Copper-Silver , ... be better.Use for copper and copper,copper and brass parts with shock in air condition and freezer, ... conductivity,well corrosion resistance,it can be used for welding all ferrous and nonferrous metals except of Aluminum, ... Sn/Zn plated steel parts. copper brazing alloy welding rod