Polished Tungsten Wire
We use stable quality tungsten raw material, which has high thermal conductivity, resistance to change, cowardly change, durability, light output, emission electron, reliability and mechanical stability. We are able to meet the customized requirements of our customers.
Product Introduction
Polished Tungsten wire is a filament made by forging and drawing tungsten rods. Tungsten wire is mainly used in electric light sources such as incandescent lamps and tungsten halogen lamps. The resistivity of tungsten wire is 5.3*10^-8. Tungsten has a high melting point, high resistivity, good strength, and low vapor pressure. It is the best material for making incandescent filaments among all pure metals. However, tungsten is hard and brittle, making it difficult to process. When the current passes through the tungsten wire and is heated to a certain temperature, the resistance value of the tungsten wire increases to a certain value (the resistance value of the general metal wire increases with the increase of temperature). At normal temperature, the resistance of this object should be 1370°C-2000°C, but when the cross-sectional area length of the tungsten wire changes, the resistance value will change.
Solid density: 19.25 grams per cubic centimeter. Liquid density: 17.6 grams per cubic centimeter. Specific heat: 130J/kg.K (300K).
Thermal conductivity: 160W/m.K (300K). Melting point: 3410±20°C Boiling point: 5555°C (under a standard atmospheric pressure)
Mohs hardness: 7.5
Latent heat of fusion: 40.13±6.67kJ/mol
Heat of sublimation: 847.8 kJ/mol (25°C)
Heat of evaporation: 823.85±20.9kJ/mol (boiling point)
Temperature coefficient of resistance: 0.00482 I/℃
Electron work function: 4.55 eV
Thermal neutron capture surface: 19.2 b
Elastic modulus: 35000—38000 MPa (wire)
Torsional modulus: ~36000Mpa
Bulk modulus: 3.108×1011－1.579×107t+0.344×103t2 Pa
Shear modulus: 4.103×1011－3.489×107t+7.55×103t2 Pa
Compressibility: 2.910－7 cm/kg
Diameter and tolerance of polished tungsten wire:
|
Diameter(μm) |
200mm wire weight |
200mm wire segment weight tolerance (%) |
Diameter Tolerance（％） |
||||
|
0 Grade |
ⅠGrade |
ⅡGrade |
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 |
||
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why choose us:
Customers can choose from a wide range of wire diameters, materials and finishing methods to suit a variety of applications.
We also offer the highest level of high purity polished tungsten wire in the world through our integrated manufacturing and tightly controlled raw materials and processes.
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