Welder Red Seal · Question
When preparing a 2% thoriated tungsten electrode for welding stainless steel with DCEN, how should the tip be prepared for optimal performance?
For DC welding, the tungsten should be ground to a taper with a small flat land on the end. This configuration helps initiate the arc, improves arc stability, a
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Question: When preparing a 2% thoriated tungsten electrode for welding stainless steel with DCEN, how should the tip be prepared for optimal performance?
Answer options:
- Balled on the end
- Needle-sharp point ✅ Tapered with a small flat land at the tip
- Notched and broken cleanly
Correct answer: Tapered with a small flat land at the tip
Explanation: For DC welding, the tungsten should be ground to a taper with a small flat land on the end. This configuration helps initiate the arc, improves arc stability, and prevents the tip from melting and contaminating the weld puddle, which can happen with a needle-sharp point.
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