ASTM GB Lightening Industry Use Pure Tungsten Wire Black / Ground Size 0.02mm
Tungsten is a lustrous and silvery white metal. The bulk metal resists attack by oxygen, acids and alkalis. Tungsten has the highest melting point of any metal.
Tungsten is used in filaments in incandescent light bulbs; it is also used in electric contacts and arc-welding electrodes. Tungsten is used in alloys, such as steel, to which it imparts great strength.
Specification of Tungsten Wires for Lightening Industry
1, Diameter: 0.02mm~2.00mm
2, Grade: WAL1, WAL2, W1, W2
3, Purity: 99.92% - 99.95%
4, Quality standard: GB/T 4181-1997(tungsten wire)ASTM B760-86
5, Specific electrical: 0.055 Ohm x mm2/m resistance at 20 °C.
6, Modulus of elasticity: 410 kN/mm2, at 20 °C.
7. Melting Point: 3410 Degrees Celsius
8. Boiling Point:5927 Degrees Celsius
9. Density: 19.3g/cm3
Packing of Tungsten Wires:
Tungsten wire in spool: plastic case or plastic vacuum packing.
Tungsten wire in coil: woven bag or plastic vacuum packing.
Note: The length or weight of single tungsten wire can be supplied by your special request.
Size Chart of Tungsten Wires:
| Diameter, mm | Diameter telorance, % | Weight ( 200mm ), mg | Length min, m |
| 0.012−0.06 | − | >0.44−10.91 | 700 |
| 0.06−0.1 | − | >10.91−30.30 | 400 |
| 0.1−0.15 | − | >30.30−68.18 | 250 |
| 0.15−0.2 | − | >68.18−121.20 | 150 |
| 0.2−0.35 | − | >121.20−371.19 | 100 |
| 0.35−0.7 | ±1.5−±2.5 | − | same as 150g |
| 0.7−1.8 | ±1.0−±2.0 | − | same as 200g |
Tungsten Grades and Applications:
| Type | Purity of tungsten | Type | Application |
| WAl1 | ≥99.92 | T | Double – screwy filament. Filament for high colour temperature lamp and shockproof lamp etc. |
| L | Filament for incandescent lamp. Cathode for emitting tube. High temperature electrodes. Twisted tungsten wire etc. |
| W | Folded – heater for electronic tube, etc. |
| WAl2 | ≥99.92 | T | Filament for fluorescent lamp etc. |
| L | Heater for electronic tube. Filament for incandescent lamp. Twisted tungsten wire etc. |
| W | Folded – heater for electronic tube, etc. |
| W1 | ≥99.95 | | Tungsten wire in twisted and heating parts etc. |
| W2 | ≥99.92 | | Grid side rod for electron tube. Tungsten wire in twisted etc. |
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ASTM B760-86 Pure Tungsten Wire Images
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