Tungsten Wire
Form: straight or rolled form
Purity:tungsten content≥99.92%
Modulus of elasticity:410 KN/mm2 at 20°C
Applications: For producing electric light source parts and electric vacuum components For producing heating elements and refractory parts in high temperature furnaces For producing heating elements used in vacuum metalizing or plating.
Appearance: W-wire is regular black covered with graphite. After graphite is removed it is metallic luster.
Chemical Composition
| Gr | Tungsten Content | Impurity Elements Content Total | Impurity Elements Content Each |
|---|---|---|---|
| WAL1, WAL2 | ≥99.95% | ≤0.05% | ≤0.01% |
| W1 | ≥99.95% | ≤0.05% | ≤0.01% |
| W2 | ≥99.92% | ≤0.08% | ≤0.01% |
Diameter Tolerance (%)
| Diameter(µm) | Weight(mg/200mm) | Weight(mg/200mm) Grade 0 | Weight(mg/200mm Grade 1 | Weight(mg/200mm Grade 2 | Daimeter Tolerance Grade 0 | Daimeter Tolerance Grade 1 | Daimeter Tolerance 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 |