... graphit 2.can use 80-100 times exothermic welding powder cadweld powder and cadweld mould1.high-quality graphit2.can use 80 ... IEEE std.80-1976.Exothermic welding mainly weld pure copper, brass, bronze, copper, copper-clad steel, pure iron, stainless steel, ductile iron, ... zinc plated steel, cast iron, copper alloy, alloy steel and etc.Welding materials produced by our ...