How To Tig Weld Aluminum Fillet. You can use mig wire as a filler and then start at 20 amps. Then, when your edges are melted and a dip of the rod will tie the pieces together at the root, the added rod will swell instantly and you must pull the tungsten back.
Tig welding in ac can remove these oxides but be aware that it also dulls the tungsten and can increase etching. You can weld on aluminum foil with the use of an arc or spot weld. Use dc reverse polarity (the electrode will be positive while the base plate is negative).
The sharper your point, the more focused your arc will be, and the less it will dance around on you.
The metal is 2mm stainless, and we set the machine to 75 amps (see the tig amp chart ). Equipping the torch with the correct wear parts for aluminum welding should not be forgotten. The ultimate shear stress, txu, is txu = rxu/lt (1) in which rxu = the ultimate force, t = the throat thickness = <=/\j2, s = the fillet size, and l = the weld length. • unique alloy selection guide on side of all boxes (mig and tig) straight lengths (tig):