How to Weld Sheet Metal or Thin Stock (For Beginners)
To weld thin stock successfully, use a small diameter tungsten electrode like 0.020, 0.040, and 1/16 in. Large-diameter tungsten electrodes require higher amperage to start the arc, leading to warping or burning of the material. Grind the tungsten tip to a sharp point to weld steel, and use either ER70S-2 filler metal or a silicon bronze rod.