I have some 3" diameter, 16 awg alumuminized exhaust tubing to tig weld together. In the past, I've used 1/16" ER70s-6 filler rod with about 60 amps.
I've read about people using a smaller diameter filler rod as it "wets in" or melts easier into the puddle on thinner materials.
Should I go with a smaller filler, and if so, what diameter?
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