Non - Sag Pure Tungsten Wire 218 Wires 0.04mm - 1.2mm For Bulb / Lamp Filament
Non-sag tungsten wire is also called doped tungsten wire or 218 tungsten wire. It is made from tungsten bars, mainly used in incandescent, halogen and other electric light sources. For a variety of light bulb for the tungsten wire, also need to mix a small amount of potassium, silicon and aluminum oxides.
Nowadays, non sag tungsten wire is generally made of a variety of drawing dies. The main application is to create the filament and high-speed cutting steel, also used in optical instruments, chemical apparatus and so on.
Brief Introduction of Non-Sag Tungsten Wires:
1. Purity: 99.95%
2. Grade: WAL1,WAL2, WAL3, WAL4 etc.
3. Density: 19.2g/cm3
4. The tungsten wire features excellent formability, long life and super lighting efficiency. Mainly used for making various electron tube, H series auto lamp,
halogen lamp and other special lamp
Applications of Non-Sag Tungsten Wires:
For producing heating elements and parts in vacuum furnaces
For producing electric light source parts and electric vaccum components
For producing heating elements used in vaccum metalizing or plating
Appearance: W-wire is regular black covered with graphite. After graphite is removed it is metallic luster.
Advantage of Non-Sag Tungsten Wires:
Non-sag tungsten wires are manufactured by the high tech of doping, acid washing, isostatic pressing, PLC controlled direct-sintering, swaging and auto feeding, The products are featured with minimum deformation at high temperatures, high recrystallization temperatures, uniformity in dimension and excellent coilability.
Tungsten Material Grades and Applications:
| Type | Name | Kind | Applications |
| WAL1 | Nonsag tungsten wires | L | Used in making single coiled filaments, filaments in fluorescent lamps and other components. |
| B | Used in making coiled coil and filaments in High power incandescent bulb, stage decoration lamp, heating filaments, halogen lamp, special lamps etc. |
| T | Used in making special lamps, exposition lamp of copy machine and lamps used in automobiles. |
| WAL2 | Nonsag tungsten wires | J | Used in making filaments in incandescent bulb, fluorescent lamp, heating filaments, spring filaments, grid electrode, gas-discharge lamp, electrode and other electrode tubes parts. |
Tolerance of Tungsten Wire:
| Diameter (μm) | Weight of 200mm length | Weight tolerance of 200mm length % | Diameter Tolerance % |
| 0 Grade | Ⅰ grade | Ⅱ grade | 0 grade | Ⅰ grade | Ⅱ grade |
| 18<d≤40 | >0.98-4.85 | ±2 | ±2.5 | ±3 | - | - | - |
| 40<d≤80 | >4.85-19.39±2 | | ±2.0 | ±2.5 | - | -- | - |
| 80<d≤300 | >19.39-272.71 | ±2 | | ±1.5 | - | - | - |
| 300<d≤350 | >272.71-371.19 | | ±1.0 | ±1.5 | - | - | - |
| 350<d≤ 500 | - | ±2 | ±2.0 | ±2.5 | | | |
| 500 <d≤1800 | - | ±1.0 | ±1.5 | ±2.0 | | | |
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Non Sag Pure Tungsten Wire 218 Wires 0.04mm - 1.2mm Coiled Tungsten Filament Images
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