With the pedal i m able to fluctuate the amperage to get exactly the size weld and penetration i need.
Tig welding 18 gauge sheet metal.
If using the finger switch on the tig welder i like to set the machine to a fixed 50 60 amps for sheet metal work.
Tig welding takes allot of practice to master so don t get discouraged.
Practice on some scrap steel till you get the feel for the melting point of the steel.
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How to weld auto body sheet metal with a tig welder.
Ditch a 1 8 inch tungsten electrode for something much smaller like 1 16 inch tungsten.
Because it will have you a lot more control over the whole process and it is more forgiving in.
For thinner gauge sheet metal like 18 or 20 gauge we suggest 023 6mm wire in your mig welder.
Keep the stick out short stickout of your mig wire is important when welding any type of metal but especially sheet metal.
However if you are dealing with materials that are 18 gauge or thicker one should be able to use 030 inch welding wire.
It is recommended that a welder should use 023 or 024 inch wire for light gauge sheet metal work.
Continue the same way along the sides of the piece of sheet metal.
I have a hobart 135 with 023 wire that works perfectly on 22 gauge body panels.
I use a 1 16 red electrode and either 030 or 035 tig filler rod.
The best two electrodes for welding auto body sheet metal is either ceriated tungsten or thoriated tungsten.
Holding the tip too far from the surface will cause the wire to have to come out too far to touch the metal.