Welding Two Different Thicknesses

[f350ca]

That is by far the most common mix Ed. I seem to weld heavier material 99% of the time so tried a mix of argon co2 and 2 or 3% oxygen. With .035 wire it feels like welding with 1/8 7018 stick. The oxygen makes the weld puddle way hotter giving beter penetration. When I bought the welder I knew nothing about mig (still don't) so opted for one with a processor that sets all the parameters for you (hence I never pay attention the voltage or wire feed rate) You input the type of gas, wire size and metal and it sets the voltage and wire speed based on the thickness you tell it your welding. Works pretty well but I usually go two thicknesses or 1/8 thicker than I'm welding if its horizontal, for overhead its spot on. But 1/8 is about as thin as I can go with that gas, I keep a small bottle of argon co2 and .025 wire around if I need to weld sheet metal.