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| Pure
Tungsten Sheets / Tubes / Rods / Crucibles |
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| 1. Chemical Composition (wt%)
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|
W
min. |
Impurities, max. |
| Pb |
Bi |
Sn |
Sb |
As |
Fe |
Ni |
Cu |
Al |
| 0.0001 |
0.0001 |
0.0001 |
0.001 |
0.002 |
0.005 |
0.003 |
0.001 |
0.001 |
| 99.95 |
Si |
Ca |
Mg |
Mo |
P |
C |
K |
Na |
|
| 0.003 |
0.002 |
0.002 |
0.008 |
0.001 |
0.005 |
0.002 |
0.002 |
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| 2. Typical Size
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| 2.1 Tungsten sheet and disc
alkali washed finish |
Thickness
(mm) |
Max. Width X Max.
Length for Sheet (mm) |
Max. Diameter for Disc
(mm) |
| 10-15 |
100 x 300 |
100 |
| 3-10 |
200 x 400 |
200 |
| 1-3 |
450 x 1000 |
450 |
| 0.1-0.9 |
450 x 500 |
450 |
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| 2.2 Tungsten sheet and disc ground finish |
Thickness
(mm) |
Max. Width X Max.
Length (mm) |
Max. Diameter for Disc
(mm) |
| 10-15 |
100 x 300 |
100 |
| 3-10 |
200 x 300 |
200 |
| 0.1-3 |
300 x 600 |
300 |
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| 2.3 Tungsten bar and rod ground finish |
| Diameter (mm) |
Max. Length (mm) |
| 10-30 |
500-300 |
| 5-10 |
1000-500 |
| 1-5 |
2000-1000 |
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| 2.4 Tungsten bar and rod swaged or forged finish |
| Diameter (mm) |
Max. Length (mm) |
| 10-30 |
600-500 |
| 5-10 |
1000-600 |
| 3-5 |
2000-1000 |
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| 3. Description
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| As a high performance materials,
Pure Tungsten has high melting temperature, high density, low vapor
pressure, low thermal expansion combined with good thermal conductivity,
sufficient electrical resistance, high modulus of elasticity. |
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| 4. Application
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| Semiconductor Base Plates,
Components for Electron Tubes, Emission Cathodes for Electron Beam
Evaporation, Cathodes and Anodes for Ion Implantation, Tubes / Boats
for Sinter of Capacitors, Targets for X-ray Diagnostics, Crucibles,
Heating Elements, X-ray Radiation Shieldings, Sputtering Targets,
Electrodes. |
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