Because it will have you a lot more control over the whole process and it is more forgiving in.
How to welding sheet metal.
As a rule when mig welding sheet metal never use a body filler metal that is thicker than the base metal.
Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal.
The best two electrodes for welding auto body sheet metal is either ceriated tungsten or thoriated tungsten.
It is recommended that a welder should use 023 or 024 inch wire for light gauge sheet metal work.
We need to establish what is considered thin metal.
To weld sheet metal with solid wires use electrode positive ep or reverse polarity.
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Forget the larger 1 8 inch tungsten electrode and use a smaller one.
Just kidding this tip is to explain how to weld sheet metal with a stick welder.
However if you are dealing with materials that are 18 gauge or thicker one should be able to use 030 inch welding wire.
Ditch a 1 8 inch tungsten electrode for something much smaller like 1 16 inch tungsten.
For thinner gauge sheet metal like 18 or 20 gauge we suggest 023 6mm wire in your mig welder.
Tig welding sheet metal.
A wire feed or tig welder is ideal for sheet metal but we will assume that you don t have one.
Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet metal.