Tig Question

[Wyn F]

Just a couple of Q's as am still struggling with this ...
Assuming the materials to be welded are the same and same thickness etc when welding the 2 parts together do you normally on strike up point the tungsten directly halfway between both parts, or angle it bias towards one part 1st?.
If one part to be welded is thicker what part if any do you weld to 1st. thick or thin ?

 

[Paul.]

The exact technique will depend on the joint type and material thickness, but the rule is a tight arc to maintain control and prevent burning plate edges away, and I often use a filler rod very early on to bridge the joint and establish a pool, its covered in the tutorial here, http://www.mig-welding.co.uk/tig-butt-weld.htm

 

[chevy2]

On unequal thickness material you will often start the arc on the thicker material, add filler and lick it across onto the thinner material, while running a bead you will need to concentrate the arc more on the thicker material side.

 

[Wyn F]

many thanks