Best Gas For Mig Welding Sheet Metal

The main reason to use a smaller diameter wire is that it takes less heat for melting and hence the metal around the weld is not heated to a very great extent.

Best gas for mig welding sheet metal.

While sheet metal is primarily a tig welding job there are times when it s handy to have an available mig welder to fuse sheet metal. It s one of the highest quality machines available and comes incredibly low priced. It is better to avoid using a flux cored wire when welding sheet metals. With these materials use a tri mix gas 90 helium 8 argon and 2 co 2.

For mig welding sheet metal it is often recommended to use an electrode wire of the smallest diameter to prevent burn through and warping. Usually copper or aluminum because they dissipate heat best clamped. In some cases there is tri mix shielding gas containing 90 helium 7 5 argon and 2 5 carbon dioxide. The best one to use is a mixture of 75 argon 25 carbon dioxide.

Otherwise you may find a lot more splatter than you have imagined. The best thing about argon is that it carries less heat than co2 which further results in less spatter. When starting to learn auto body sheet metal welding with a mig welder you should opt for a shielding gas that has a higher proportion of argon gas. The hobart handler 140 mig is the best affordable mig welder for sheet metal.

The majority of the sheet metal welding i ve done was with a 90 amp 110 volt welder. Mig welding is the preferred method for most automotive bodywork and since sheet metal is the thinnest of metals a large expensive mig unit is usually not required. Mig welding sheet metal. As for shielding gas a higher argon based gas is recommended.

It is better to use instead of a high percentage of co2. As a rule when mig welding sheet metal never use a body filler metal that is thicker than the base metal. Wires are compatible but for welding 316l stainless you need a 316l wire.