1.5M views · 874 reactions | Mig Welding outside corner joints and testing them using the cut and etch test. C25 gas was used along with .035 (.9mm) ER70s-6 wire. Thermal Arc fabricator 252i welder (very finicky) was used. Uphill single pass weld tested against 2 pass weld with downhill root pass. mig welding settings and techniques described in detail at | Welding Tips & Tricks | Facebook