GTAW Electrodes: Which designation corresponds to a Pure Tungsten electrode?

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Prepare for the GTAW Advanced Welding Exam. Use flashcards and multiple choice questions, each with hints and detailed explanations. Excel in the exam!

Multiple Choice

GTAW Electrodes: Which designation corresponds to a Pure Tungsten electrode?

Explanation:
In GTAW, the electrode code reveals what the tungsten is made of. A pure tungsten electrode is designated EWP, where the “P” stands for pure, meaning no alloying elements are added. The other labels point to alloyed tungsten: EWTh-1 is 1% thorium-tungsten, EWZr is zirconium-tungsten, and EWLa-1 is 1% lanthanum-tungsten. These alloy additions change arc characteristics and wear behavior, but the pure tungsten designation identifies a non-alloyed electrode.

In GTAW, the electrode code reveals what the tungsten is made of. A pure tungsten electrode is designated EWP, where the “P” stands for pure, meaning no alloying elements are added. The other labels point to alloyed tungsten: EWTh-1 is 1% thorium-tungsten, EWZr is zirconium-tungsten, and EWLa-1 is 1% lanthanum-tungsten. These alloy additions change arc characteristics and wear behavior, but the pure tungsten designation identifies a non-alloyed electrode.

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