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.
AW | Features excellent high-temperature deformation resistance, blackening resistance, shocking resistance, less impurity gas, and long life. |
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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% |
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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 | △ | △ | ◎ | △ | ○ | ◎ | ○ |
To see the whole table, scroll sideways.
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 |
Type | W % |
---|---|
AW, AX, EX, CY, EP, KT | 99.95min. |
DW | 99.20min. |
4N-W | 99.99min. |
5N-W | 99.999min. |