Which Copper alloy is best for use as a welder backer plate for TIG welding? McMaster-Carr list the following available Copper alloys;
101, 102, 110, 122, 145, 182
Basically any sheet will do. it is to keep air from the back of the weld and to prevent weld from dropping intto
the receiver. I used copper tubing couplings cut and flattened. this is better as you can form it to fit .
