Blue Demon ERCu X 1/16" X 36" X 1LB Tube Deox Copper TIG welding rod This easy flowing alloy produces weld deposits that match the color of copper, are electrically conductive and porosity free Applications include joining copper pipes, tanks and copper fittings, joining deoxidized copper, overlaying steel surfaces to resist corrosion Welding current AC-DCEP, AWS specification AWS A5.7