- tungsten, molybdenum, tantalum, niobium and rhenium,ods-copper,
cemented carbide.
Products
Tungsten Wires
Application:
- Electric light source and electric vacuum part
- Refractory parts of industrial high temperature furnace
- Tungsten screw used for vacuum evaporation
Appearance:
W-wire is regular black covered with graphite. After graphite is removed it is metallic luster.
Chemical Composition:
|
Brand |
Tungsten content |
Impurity content |
|
|
Total content |
Single element content |
||
|
WAL1、WAL2 |
≥99.95% |
≤0.05% |
≤0.01% |
|
W1 |
≥99.95% |
≤0.05% |
≤0.01% |
|
W2 |
≥99.92% |
≤0.08% |
≤0.01% |
|
Note：K is not as impurity content |
|||
Diameter and Tolerance of Tungsten Wires:
|
Nominal diameter(μm) |
200mm wire segment weight |
200mm wire segment weight tolerance (%) |
Diameter tolerance (%) |
||||
|
0 Grade |
ⅠGrade |
Ⅱ Grade |
0 Grade |
ⅠGrade |
ⅡGrade |
||
|
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 |
||
|
500 |
－ |
－ |
±1.0 |
±1.5 |
±2.0 |
||