For thin metal, a flow rate between 10 and 15 cubic feet per hour (CFH) is usually sufficient to shield the puddle without disrupting it. Matching Wire Diameter to Task Selecting the correct wire diameter is non-negotiable when working with thin metal settings.
Optimal Voltage Settings for Thin Metal Mig Welding
Workpiece Preparation and Backing. For sheet metal thicknesses under 20 gauge, transitioning to a 0.
Technique and Gun Handling Even with perfect machine settings, poor gun handling will ruin thin metal projects. Conversely, if the voltage is too low, the wire will crowd the contact tip, causing a rough, sputtering arc that fails to melt the parent metal effectively.
Optimal Voltage Settings for Thin Metal Mig Welding
For thin materials, you need a relatively lower voltage setting, typically in the range of 15 to 18 volts, to maintain a stable arc that does not generate excessive penetration. Keep the nozzle close to the work surface—roughly 3/4 to 1 inch away—to maintain a strong, concentrated arc.
More About Mig welding thin metal settings
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