Electrode Size Tig Weld 20 Gauge Sheet Metal

Fit up and joint design.

Electrode size tig weld 20 gauge sheet metal.

To weld mild steel choose an american welding society classification wire such as er70s 6 which has a weld puddle that wets out nicely. Tig welding parametres table. Selecting the right size depends on variables such as polarity amperage joint size and base metal thickness. Joint as rapidly as in carbon steel.

With over 0 20 c often require a post weld heat treatment to soften and toughen the weld. In a situation when a welder needs to make a butt weld on a 20 gauge panel and the parts are not able to touch each other not even for even 1 16 inches you will create a gap that is not capable of being absorbed by the heat. In resistance welding lower current can. To ensure the integrity of the weld the filler metal and base material should be chemically compatible and possess similar mechanical properties.

Electrode size common tungsten electrode sizes range from 3 32 to 1 1 4 of an inch. Tig welding and tungsten metal work so well when welding mild steel because the tungsten keeps the arc with a consistent temperature of 11 000 degrees f. A bad low quality earth or a low voltage supply can seriously lower the maximum welding capabilities of your welder. The tig process relies on tungsten s hardness and high temperature resistance to carry the welding current to the arc as it has the highest melting point of any metal 3 410 degrees celsius.

Compared with other electrodes thoriated electrodes deposit less tungsten into the weld puddle so they cause less weld contamination. Electrode solid wire and cored wire and can be used to weld types 402 410 414 and 420 steels. Sheet metal welding demands really tight fit ups. When the material is 18 gauge and thicker you may be able to use a 030 inch wire.

These electrodes are used mainly for specialty ac welding such as thin gauge aluminum and material less than 0 060 inch and dc welding either electrode negative or straight polarity on carbon steel. Below are five tables that will help select the correct current and tungsten size type when initially setting up your tig welder tweak and change as necessary for your own situation. Tungsten brings us a high melting point and also offers excellent electrical conductivity as you weld so the tungsten electrode won t ever burn up.