Bad Sheet Metal Weld

Sheet metal is a lot thinner than other materials that one needs to weld so a completely different approach is needed.

Bad sheet metal weld.

This is due to many factors that came into play. Sometimes even professional welders may have trouble in welding thinner materials. 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. If you re repairing an old car then you ll almost certainly need to weld rusted sheet metal at some point.

The hobart handler 140 mig is the best affordable mig welder for sheet metal. Not only do they look horrible but they make the metal structurally weak and less safe. Small wires also provide more control over the weld bead and a better chance of recovering from mistakes due to lower deposition rates. Signs of a bad weld include.

Also clean the metals before even starting to avoid the build up of oxide layers. A 100 argon shielding gas is the most common in mig welding aluminum sheet metal. They can also cause costly future repairs if the rust spreads to vital components and damages them. For cv mig welding on sheet metal wire diameters of 035 inch are recommended.

Even professional welders can create excessive heat affected zones and burn through while welding sheet metal. Here s a few tips on repairing rust holes in car body panels. Underside of weld has insufficient penetration excessive globules of metal over sized weld undersized welds undercut overlap incomplete fusion porosity and or cracking. 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.

Rusted body panels need to be repaired. It requires a lot of experience patience and skill to get the desired results. Take the time for proper fit up proper tight part fit up is especially important when welding thin materials. Lap welds because they cannot flex like the sheet metal around them will eventually show visible creases.

To recap firstly you should never haste or go too fast when it comes to how to weld auto body sheet metal. When welding sheet metal the main thing to look out is to prevent warping and burn through. Excessive grain growth or the presence of hard spots cannot be determined visually. In this video im showing you the process i use to do small rust repairs where a complete panel.

It s one of the highest quality machines available and comes incredibly low priced.