What voltage range is used for 20 gauge steel when utilizing short circuit with CO2?

The voltage range of 17-18 volts is appropriate for MIG welding 20 gauge steel using short circuit transfer with CO2 as the shielding gas. This range allows for sufficient penetration and heat to create a good fusion between the base metals while minimizing the risk of burn-through, which is particularly important when working with thinner materials like 20 gauge steel.

In short circuit transfer, the arc length is short, and a lower voltage helps maintain control over the weld pool, making it easier to manage the heat input. It strikes a balance where the weld can be achieved effectively without excessive heat that could compromise the material's integrity.

Other voltage levels either push the heat too high, risking burn-through or insufficient penetration, making it difficult to achieve a sound weld. Thus, the choice of 17-18 volts aligns with industry practices for effectively welding 20 gauge steel under these specific conditions.