| Material | Pure tungsten |
| Specification | Ф(0.08-3.2)mm*L |
| Density | 19.2g/cm3 |
| Purity | 99.95% |
| Surface | Black, alkali wash, electric polishing |
| Grade | W-1, W-2，WAL-1，WAL-2 |
Electrical light sources, heating wires, electronic devices, electronic watch,electronic computer,mini-bulb and other precision equipment manufacture etc.
1. High melting point and high corrosion resistance| Designation | Tungsten Content | Impurity Elements Content | |
| Total | Each | ||
| WAL1、WAL2 | ≥99.95% | ≤0.05% | ≤0.01% |
| W1 | ≥99.95% | ≤0.05% | ≤0.01% |
| W2 | ≥99.92% | ≤0.08% | ≤0.01% |
| Note: Potassium is not counted in impurities content. | |||
| Diameter (μm) | Weight (mg/200mm) | Weight(mg/200mm) Tolerance(%) | Diameter Tolerance(%) | ||||
| Grade 0 | Grade 1 | Grade 2 | Grade 0 | Grade 1 | Grade 2 | ||
| 5≤d≤12 | 0.075~0.44 | － | ±4 | ±5 | － | － | － |
| 12 | >0.44~0.98 | － | ±3 | ±4 | － | － | － |
| 18 | >0.98~4.85 | ±2 | ±2.5 | ±3 | － | － | － |
| 40 | >4.85~19.39 | ±1.5 | ±2.0 | ±2.5 | － | － | － |
| 80 | >19.39~272.71 | ±1.0 | ±1.5 | ±2.0 | － | － | － |
| 300 | >272.71~371.79 | － | ±1.0 | ±1.5 | － | － | － |
| 350 | － | － | ±1.5 | ±2.0 | ±2.5±1.0 | ||
| 500 | － | － | ±1.0 | ±1.5 | ±2.0 | ||
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