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TIG Welding
| 1. Use Argon shielding for steel, stainless, and aluminum. |
| 2. Use DC-Straight Polarity (DCEN) for steel and stainless. Use AC for aluminum. |
| 3. Always use a push technique with the TIG torch. |
| 4. Match the tungsten electrode size with the collet size. |
| 5. Aluminum - use a pure tungsten, AWS Class EWP (green identifying band). Will form a balled-end in AC. |
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6. Steel and stainless steel - use a 2% thoriated tungsten, AWS Class EWTH-2 (red identifying band). Prepare a pointed-end for DCEN welding. (Refer to Diagram 11. Tungsten Preparation)
 7. When welding a fillet, the leg of the weld should be equal to the thickness of the parts welded.(Refer to Diagram 10. Recommended Fillet Weld Thickness)
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