Tungsten Wires
Description:
Covered with graphite, tungsten wires are regular black. However, if graphite surface being removed, they appear with metallic luster. According to various impurity contents, tungsten wires can be subdivided into WAL1, WAL2, W1 and W2 designations.
Application:
1. Tungsten wires can be used for producing electric light source parts and electric vacuum components;
2. They are also used for producing heating elements and refractory parts in high temperature furnaces
3. Tungsten wires can be used for producing heating elements in vacuum plating.
Chemical Composition:
| 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. | |||
Parameters of Tungsten Wires:
| 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<d≤18 | >0.44~0.98 | － | ±3 | ±4 | － | － | － |
| 18<d≤40 | >0.98~4.85 | ±2 | ±2.5 | ±3 | － | － | － |
| 40<d≤80 | >4.85~19.39 | ±1.5 | ±2.0 | ±2.5 | － | － | － |
| 80<d≤300 | >19.39~272.71 | ±1.0 | ±1.5 | ±2.0 | － | － | － |
| 300<d≤350 | >272.71~371.79 | － | ±1.0 | ±1.5 | － | － | － |
| 350<d≤500 | － | － | ±1.5 | ±2.0 | ±2.5 | ||
| 500<d≤1800 | － | － | ±1.0 | ±1.5 | ±2.0 | ||
Packing and Shipping:
We deliver tungsten wires in plywood cases by ocean shipping or air transportation.
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