For 20 gauge steel utilizing short circuit with 75% argon and 25% CO2, what is the approximate voltage range?

For welding 20 gauge steel using the short circuit welding process with a mix of 75% argon and 25% CO2, the approximate voltage range is typically around 15 to 16 volts. This range is suitable for short circuit transfer, where the welding arc is created by the short circuiting of the molten metal on the workpiece.

Using this voltage range allows the welder to maintain good control over the weld pool and achieve proper penetration without burning through the thin gauge steel. Short circuit MIG welding generally operates effectively within this voltage area because it balances the heat input and the cooling characteristics of the thin material, resulting in a clean and consistent weld.

The chosen gas mixture, with a high proportion of argon, helps stabilize the arc and reduces spatter, which is beneficial in these applications. Therefore, knowing that 15-16 volts is the optimal range allows welders to set their equipment accordingly for effective and efficient welding of 20 gauge steel.