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. | |||
The diameter and tolerance of W-wire:
|
Diameter |
Weight (mg/200mm) |
Weight(mg/200mm) tolanrance(%) |
Diameter tolerance(%) | ||||
|
Grade 0 |
Grade1 |
Grade2 |
Grade 0 |
Grade1 |
Grade2 | ||
|
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 | ||
Appearance:
W-wire is regular black covered with graphite. After graphite removed it is metallic luster.
Applications:
* For producing electric light source parts and electric vaccum components;
* For producing heating elements and refractory parts in high temperature furnaces;
* For producing heating elements used in vaccum metalizing or plating.