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Thoriated Tungsten Electrode (WT-7 / WT-10 / WT-20 / WT-30 / WT-40)
Thoriated Tungsten Electrode:
The comprehensive performance of thoriated tungsten is very good. The electron emission is strong and the electron work function is 2.7eV. What is more, with high current load ability stable arc thoriated tungsten electrode can bear long-time welding. These tungsten electrodes are very popular in USA and other countries. The only disadvantage of this electrode is slight radioactive pollution. It is often been used for D.C. welding of carbon steel, stainless steel, nickel alloy and titanium alloy.
| Type | Mark | Other Impurity Content | Tungsten | Color | Electron Work Function |
| - | - | % | % | - | eV |
| Thoriated Tungsten Electrode | WT-7 | <0.20 | Rest | - | 2.0-2.2 |
| Thoriated Tungsten Electrode | WT-10 | <0.20 | Rest | YELLOW | 2.6 |
| Thoriated Tungsten Electrode | WT-20 | <0.20 | Rest | RED | 2.7 |
| Thoriated Tungsten Electrode | WT-30 | <0.20 | Rest | PURPLE | 3 |
| Thoriated Tungsten Electrode | WT-40 | <0.20 | Rest | ORANGE | 3.5 |
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