What is one advantage of using pure tungsten electrodes over alloyed ones?

Using pure tungsten electrodes offers the advantage of forming a clean, balled tip when heated, which is critical for achieving a stable arc in Gas Tungsten Arc Welding (GTAW). This characteristic enhances the effectiveness of the electrode during the welding process, as the clean, balled tip promotes better arc stability and allows for more controlled heat input.

When the tungsten is heated, it tends to melt and develop a rounded end that is ideal for maintaining a focused arc. This is especially important in GTAW, where precision and control are paramount for producing high-quality welds. The ability of pure tungsten to create a consistent and smooth arc contributes to achieving better arc stability compared to alloyed electrodes, which may not form as reliably or consistently.

In contrast, the other options highlight aspects that either do not apply or are not advantages of pure tungsten electrodes in the context of welding performance.