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When TIG welding steel, which polarity setting does Miller recommend?

DC electrode negative (DCEN).

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  1. DC electrode negative (DCEN) ✔
  2. DC electrode positive (DCEP)
  3. AC

Why: Steel and steel alloys are TIG welded on DC with the torch on the negative side. Aluminum switches to AC.

Huh, didn't know that: Miller suggests 2% ceriated tungsten (gray) as an all-purpose choice for both AC and DC.

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Why did the electron stay home from school? It was feeling a little negative.
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References

Answer: DC electrode negative (DCEN). Steel and steel alloys are TIG welded on DC with the torch on the negative side. Aluminum switches to AC.

  1. Guide to TIG Welding Basics (Miller) www.millerwelds.com/en-US/resources/knowledge-hub/tig-welding/how-to/guide-to-tig-welding-basics
    Set to DC TIG or DCEN.
    Checked 2026-10-10.

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