![click to zoom](../img/cp0801.jpg) Tungsten rod [click to zoom]
Type & Application
Type |
Application |
W91 W71 W61 |
Applied for making filament, cathodes, setting rod at H.t., electrode etc. |
W31 W42 W11 |
Applied for making lead, support, typing needle. |
Diameter Range
Classification |
Dia min |
Dia max |
black W rod |
swaged |
3.0 |
13.5 |
straightened |
0.5 |
3.0 |
ground W rod |
1.0 |
13.5 |
Chemical Composition
WF |
Fe |
Mo |
other element |
>99.95 |
<=0.0020 |
<=0.0030 |
<=0.0010 |
Note: "K" is not regarded as impurity.
Diameter Tolerance
diameter |
Black W rod |
ground W rod |
length tolerance |
Diameter tolerance |
roundness |
diameter tolerance |
roundness |
0.5<d<=0.8 |
±2 |
2 |
- |
- |
L<=50¡¡±0.5
50<L<=100 ±1.0
100<L<=300 ±1.5
300<L<=500 ±2.0
500<L<=1000 ±2.5
1000<L<=2000 ±5 |
0.8<d<=3.0 |
±2 |
2 |
±0.03 |
0.03 |
3.0<d<=6.5 |
±2 |
2 |
±0.05 |
0.05 |
6.5<d<=13.5 |
±2 |
2 |
±0.08 |
0.08 |
|