How To Mig Weld Automotive Sheet Metal

Then tack between the two previous tacks.

How to mig weld automotive sheet metal.

Tack in a few places apart from each other and wait until the panel is cool to the touch. A better technique is to move around the weld seam doing short quick stitch welds that you eventually connect all together. For mig welding sheet metal it is often recommended to use an electrode wire of the smallest diameter to prevent burn through and warping. When welding a long bead on sheet metal you ll put excessive heat into the panel and run the risk of the puddle falling through the panel.

While replacing body panels overheating and warping thin sheet metal is common. Short quick welds when welding sheet metal with a mig welder you do not want to try and run one long bead like when you re welding heavier metal. Sheet metal warps easily and also can burn through easily. The best two electrodes for welding auto body sheet metal is either ceriated tungsten or thoriated tungsten.

Andy gives helpful insights and tips to mig weld thin sheet metal. I keep blowing through my thin sheet. Place the welding tip wire at the gap and tack weld several small spots spacing them evenly apart. Avoid warping the sheet metal.