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| Chemical components(%) |
| W | K | Fe | Mo | Total content of other components |
| ≥99.95 | 0.004-0.010 | ≤0.0020 | ≤0.0030 | ≤0.0010 |
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Chemical components |
| Diameter tolerance |
| Tungsten wire Diameter | Tungsten wire Weight | 200mm Weight tolerance% | Diameter tolerance |
| - | - | Grade 0 | GradeⅠ | GradeⅡ | GradeⅠ | GradeⅡ |
10 | 0.30-0.98 | - | ±3.0 | ±4.0 | - | - | |
18 | 0.98-4.85 | ±2.0 | ±2.5 | ±3.0 | - | - | |
40 | 4.85-19.39 | ±1.5 | ±2.0 | ±2.5 | - | - | |
80 | 19.39-272.71 | ±1.0 | ±1.5 | ±2.0 | - | - | |
300 | 272.71-371.19 | - | ±1.0 | ±1.5 | - | - | |
350 | - | - | - | - | ±1.5 | ±2.0 | |
500 | - | - | - | - | ±1.0 | ±1.5 | |
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