My wife has come up with a need for me to tig weld some copper sheet for an art project - and the deadline is tonight, apparently. The project goes on display on the weekend.
Material is about .035" copper sheet, exact alloy unknown, and I need to basically seam weld four seams, each about 4" long. Think mansard roof. I have enough material to screw up once only, and a few test pieces.
I have Lincoln SQ 175, Argon, 3/32" Lanthanated tungsten, no filler rod to speak of.
Can I use copper ground wire from romex as filler (14 Ga)? should I trim strips from the workpiece to use as filler? What cleaning regime should I use to prep? and obviously, what Tig settings and amps should I use? AC or DC?
Thanks much in advance!