Tungsten wires
Used for filament for lighting, electron tube, electrode, high-temperature furnace parts, probe pins
Tungsten wire is used as filaments for lighting, electron tubes, electrodes, high-temperature furnace parts, probe pins, by making the most of its characteristics: the highest melting point among metals. Customers can choose wires from a variety of wire diameters, materials and finishing method for various applications.
We also offer the world’s highest level high-purity tungsten wire by our integrated production and strictly controlled raw material and processes.
Product selection guide
| AW | Features excellent high-temperature deformation resistance, blackening resistance, shocking resistance, less impurity gas, and long life. |
|---|---|
| AX | Compared with conventional materials, the recrystallization temperature is higher (by 50° to 200°C), dope hole is smaller, crystal structure after recrystallization is 3 to 4 times longer, and non-sagging performance is greatly improved. |
| EX | World’s No.1 grade filament material. It contains less impurity gas, excels in high temperature deformation resistance and corrosion resistance against evaporated metals including Al, Ni, Cr. Moreover, it has a long life. |
| DW | Long lifetime tungsten material that facilitates emission of thermo-electrons and prevents grain growth and integranular fracture at thermionic emission temperature. We respond to coil processing, tip processing, and assembly processing upon your request. |
| CY(PFW) | The most common pure tungsten material with good workability, excellent corrosion resistance, and less impurity gas contained. |
| EP,KT | Dramatically reduces discharge consumption resistance by finely dispersing crystal grains. |
| 4N-W 5N-W |
World’s highest grade high-purity tungsten material. Purity 4N-W ≧99.99％ 5N-W ≧99.999％ |
To see the whole table, scroll sideways.
| Application | Non-sag | shock resistance |
Machinability | Discharge ability |
Discharge consumption resistance |
Wear resistance |
Corrosion resistance (VM) |
|
|---|---|---|---|---|---|---|---|---|
| AW | Filament for halogen lamps (thinner), Grids, Supports, Heaters and Corona wires |
◎ | ○ | ○ | △ | ○ | ○ | △ |
| AX | Filaments for ultra-high temperature halogen lamps (thicker) |
◎ | ◎ | ◎ | △ | ○ | ○ | △ |
| EX | Vaccum evaporation, Heaters for high-temperature furnaces, Print wires for printers, Supports, Discharge electrodes and Probe pins |
○ | ○ | ◎ | △ | ◎ | ◎ | ◎ |
| DW | Electrodes, EDM wires and Filaments for thermionic emission |
○ | ◎ | ◎ | ◎ | ◎ | ○ | △ |
| CY (PFW) |
Structural materials and Heaters for furnaces |
△ | △ | ◎ | △ | △ | ○ | ◎ |
| EP | Discharge electrodes, Structural materials, Pressure welded electrode | ○ | △ | ◎ | △ | ◎ | ◎ | △ |
| KT | Discharge electrodes, Structural materials |
○ | △ | ◎ | △ | ◎ | ◎ | △ |
| 4N-W 5N-W |
Electrodes, Heaters | △ | △ | ◎ | △ | ○ | ◎ | ○ |
Standard specifications of tungsten wires
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| Diameter range (mm) |
material | Representative spec | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| AW | AX | CY EX |
4N-W 5N-W |
Finish | Tolerance diameter |
Tolerance MG |
||||
| Black | CC | Electrolytic | Straight | |||||||
| to 0.0129 | ○ | ±0.005mm | ±4% | |||||||
| 0.013 to 0.029 | ○ | ○ | ○ | ±0.005mm | ±3% | |||||
| 0.03 to 0.14 | ○ | ○ | ○ | ○ | ±0.005mm | ±2% | ||||
| 0.15 to 0.39 | ○ | ○ | ○ | ○ | ○ | ○ | ±0.005mm | ±2% | ||
| 0.40 to 0.49 | ○ | ○ | ○ | ○ | ○ | ○ | ±0.01mm | ±2% | ||
| 0.50 to 0.59 | ○ | ○ | ○ | ○ | ○ | ○ | ±0.02mm | |||
| 0.60 to 0.79 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ±0.03mm | ||
| 0.80 to 0.99 | ○ | ○ | ○ | ○ | ○ | ±0.03mm | ||||
| 1.0 to 1.2 | ○ | ○ | ○ | ○ | ±0.04mm | |||||
| 1.3 to 2.0 | ±0.04mm | |||||||||
| 2.1 to 3.2 | ±0.05mm | |||||||||
Purity of tungsten wire
| Type | W % |
|---|---|
| AW, AX, EX, CY, EP, KT | 99.95min. |
| DW | 99.20min. |
| 4N-W | 99.99min. |
| 5N-W | 99.999min. |
- Tungsten technical information