Reply to "Learning to TIG aluminum"

I got this from a welding web site but is basically what I am doing:

TIG Welding

1. Good process for thin metal � very clean process producing good looking welds.
2. Use Argon shielding for steel, stainless, and aluminum.
3. Use DC-Straight Polarity (DCEN) for steel and stainless. Use AC for aluminum.
4. Always use a push technique with the TIG torch.
5. Match the tungsten electrode size with the collet size.
6. Aluminum � use a pure tungsten, AWS Class EWP (green identifying band). Will form a balled-end in AC.
7. Steel and stainless steel � use a 2% thoriated tungsten, AWS Class EWTH-2 (red identifying band). Prepare a pointed-end for DCEN welding.

Keep in mind not all aluminum is weldable. I am using 6061, pure argon, AC and the green tungsten tips.

Gary