Welder Red Seal · Question
Which GTAW tungsten electrode type is a suitable, non-radioactive replacement for 2% Thoriated (EWTh-2) and is excellent for both AC and DC applications?
2% Lanthanated (EWLa-2) tungsten is a versatile, non-radioactive electrode that performs very well on AC for aluminum and on DC for steels. It has excellent arc
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Question: Which GTAW tungsten electrode type is a suitable, non-radioactive replacement for 2% Thoriated (EWTh-2) and is excellent for both AC and DC applications?
Answer options:
- Pure Tungsten (EWP)
- 2% Ceriated Tungsten (EWCe-2)
- Zirconiated Tungsten (EWZr-1) ✅ 2% Lanthanated Tungsten (EWLa-2)
Correct answer: 2% Lanthanated Tungsten (EWLa-2)
Explanation: 2% Lanthanated (EWLa-2) tungsten is a versatile, non-radioactive electrode that performs very well on AC for aluminum and on DC for steels. It has excellent arc starting characteristics and stability, making it a popular replacement for the traditional 2% Thoriated tungsten.
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