Types and specs
Type                                          Dia
                                          Min           max
Black tungsten pole  swaged             2.5           11.0
Black tungsten pole  straighted           0.8           3.0
Ground tungsten pole                     0.8           10.0
               Content(%)
W             K             Fe          Mo         others
≥99.95 0.004-0.010    ≤0.0020      ≤0.0030    ≤0.0010
               Diameter tolerance
Dia.(mm)        black tungsten pole               Ground tungsten pole
                 Dia tolerance% Roundness%      Dia.tolerance(mm) Roundness%
0.40<d&#8804;0.8.       ±2            2                    -                    -
0.80<d&#8804;3.0        ±2            2                  ±0.03                0.03
3.0<d&#8804;6.5         ±2            2                   ±0.05               0.05
6.5<d&#8804;14          ±2            2                   ±0.08               0.08
        Brand and W content
Brand      WAL1      WAL2                          
W content  &#8805;99.95% &#8805;99.95%
Usage:manufacture tungsten wire,frame of grid,elicit wire,bracket,unsag tungsten wire,mould rods in high temperature,eradiate cathode,electrodes,bracket of heating.