Bad Sheet Metal Weld

A 100 argon shielding gas is the most common in mig welding aluminum sheet metal.

Bad sheet metal weld.

It s one of the highest quality machines available and comes incredibly low priced. 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. Take the time for proper fit up proper tight part fit up is especially important when welding thin materials. Also clean the metals before even starting to avoid the build up of oxide layers.

Sometimes even professional welders may have trouble in welding thinner materials. Underside of weld has insufficient penetration excessive globules of metal over sized weld undersized welds undercut overlap incomplete fusion porosity and or cracking. Novice welders need to understand that every material demands a different approach. Even professional welders can create excessive heat affected zones and burn through while welding sheet metal.

In this video im showing you the process i use to do small rust repairs where a complete panel. Gaps between the pieces to be welded can contribute to warpage. Signs of a bad weld include. They can also cause costly future repairs if the rust spreads to vital components and damages them.

Lap welds because they cannot flex like the sheet metal around them will eventually show visible creases. Rusted body panels need to be repaired. It requires a lot of experience patience and skill to get the desired results. For cv mig welding on sheet metal wire diameters of 035 inch are recommended.

Here s a few tips on repairing rust holes in car body panels. When welding sheet metal the main thing to look out is to prevent warping and burn through. Small wires also provide more control over the weld bead and a better chance of recovering from mistakes due to lower deposition rates. To recap firstly you should never haste or go too fast when it comes to how to weld auto body sheet metal.

Not only do they look horrible but they make the metal structurally weak and less safe. Excessive grain growth or the presence of hard spots cannot be determined visually. Mig welding sheet metal always use the smallest wire diameter possible since smaller wires take less heat to melt and heat the metal less. Sheet metal is a lot thinner than other materials that one needs to weld so a completely different approach is needed.

The rest is up to what way you are doing your welding and what results you want to achieve but it is also essential to take proper safety measures as well.