Tungsten wire is a very popular material as the bulb filament. Tungsten has a high mechanical strength even in a high temperature environment. It has the melting point of 3410 degree C, the highest among all metals, low vapor pressure, high mechanical strength, and low out-gas at high temperature. Thin tungsten wire is heated and worked using a diamond dice with black lead as a lubricant.
Our product TOKUSAI Wire was established by the technologies backed up with customer's needs and our experience for more than 60 years, and obtained the reliance ofcustomers both domestic and overseas. We can respond flexibly to the order made size of individual request of the customer.
Tungsten wire type
Type | Characteristics | Applications |
TWG | K, Al, Si doped standard non-sag tungsten, high formable | Incandescent lamp, fluorescent lamp, stranded wire for rope, charge wire |
TWR | 3% Rhenium tungsten wire with good high temperature strength and good elongation after recrystallization | Electron tube heater Special vibration resist lamps |
TWT | Tungsten wire with good high temperature strength by dispersion of thoria | Small and low power vibration resist lamps |
Standard specifications for tungsten wires ＴＷG −ＣＳ
Product code(Type) Finishing
Finishing | Process | Available size range | Diameter tolerance |
-B | As Drawn | 0.008-1.00ｍｍφ （0.20-3016mg/200mm） | 0.5-1.5% (mg/200mm1.0-3.0%) |
-C | Drawing—EP* | 0.0025-0.50mm φ （0.020-750mg/200mm） | 0.5-1.5% (mg/200mm1.0-3.0%) |
-CS | Drawing—EP—Straightening | 0.0025-0.50mmφ（0.020-750mg/200mm） | 0.5-1.5% (mg/200mm1.0-3.0%) |
*EP：Electrolytic polishing
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