Welder Red Seal · Question
A welder is about to GTAW weld thin-gauge 304 stainless steel sheet for a food processing application. The welding procedure specifies using 1.6 mm diameter 2% Ceriated tungsten electrodes. What is the correct tip preparation for these electrodes when welding stainless steel with DCEN?
For DCEN welding on stainless steel, a 2% ceriated electrode should be ground to a sharp, conical point with a small flat (often 10% of the electrode diameter)
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Question: A welder is about to GTAW weld thin-gauge 304 stainless steel sheet for a food processing application. The welding procedure specifies using 1.6 mm diameter 2% Ceriated tungsten electrodes. What is the correct tip preparation for these electrodes when welding stainless steel with DCEN?
Answer options:
- A rounded, balled tip. ✅ A sharp, conical tip with a small flat at the end.
- A flat, blunt tip equal to the electrode diameter.
- A severely tapered tip with a very sharp point.
Correct answer: A sharp, conical tip with a small flat at the end.
Explanation: For DCEN welding on stainless steel, a 2% ceriated electrode should be ground to a sharp, conical point with a small flat (often 10% of the electrode diameter) at the end. This geometry provides a stable, concentrated arc, good penetration, and helps prevent the point from melting and contaminating the weld pool.
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