1. Test Certificate. If you need a Mill Certificate for our goods, please feel free to email me.

2.  Overview for tungsten electrode:

Tungsten is a rare metallic element used for manufacturing gas tungsten arc welding (GTAW) electrodes. Tungsten has the highest melting point of any metal, 3,410 degrees Celsius. The GTAW process relies on tungsten's hardness and high-temperature resistance to carry the welding current to the arc. 

 These non-consumable electrodes come in a variety of sizes and lengths and are composed of either pure tungsten or other rare-earth elements and oxides. Choosing an electrode for GTAW depends on the base material type and thickness and whether you weld with alternating current (AC) or direct current (DC). Which one of three end preparations you choose, balled, pointed, or truncated, also is crucial in optimizing the results and preventing contamination and rework.

 Each electrode is color-coded to eliminate confusion over its type. The color appears at the tip of the electrode. Thoriated Tungsten Electrode is with red tip; Ceriated Tungsten Electrode is with grey tip; Pure Tungsten Electrode is with green tip.

3. Current bearing capacity under different power polarities.