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| Tungsten tungsten electrode | |||||
| Brand | Added oxide | Impurity content% | Tungsten content% | Color code | |
| kind | content | ||||
| WT10 | ThO2 | 0.80-1.20 | <0.20 | margin | yellow |
| WT20 | ThO2 | 1.70-2.20 | <0.20 | margin | red |
| WT30 | ThO2 | 2.80-3.20 | <0.20 | margin | purple |
| WT40 | ThO2 | 3.80-4.20 | <0.20 | margin | orange |
| Features: The tungsten-tungsten electrode has good comprehensive performance, especially capable of withstanding overload current. It is the most widely used tungsten electrode in the United States and some other countries, but its application in some aspects is limited due to slight radioactive contamination. Tantalum tungsten electrodes are commonly used for DC welding of carbon steel, stainless steel, nickel alloys and titanium. | |||||
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