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Tungsten wire VA 8 micron - 500 micron
Dignity
Tungsten wire is made from a very refractory metal, which has a melting point is +3422°C. the High heat resistance, strength and corrosion resistance to corrosive gas and liquid environments allows her to apply for the most important products. It has excellent mechanical properties: abrasion resistance, minimum thermal expansion coefficient, hardness at high temperatures compared to other metals, high modulus of compression/stretching, very high creep resistance, electrical resistivity, good thermal conductivity. The exceptional reliability of the tungsten wire in the most extreme conditions made it irreplaceable in the forefront of modern industry.
| Physical quality | |
|---|---|
| The temperature at which the obtained data the features of t°C | 20°C |
| The linear thermal expansion coefficient α [1/Deg] | 43x10-6 |
| The density of the alloy [g/cm3] | 19,3 |
| Tensile strength tensile kg/mm2 | 35 |
| Specific heat at 20 °C [kJ/(kg·deg)] | 0,134 |
| The thermal conductivity K [W/(m·K)] | 300,173 |
| Electrical resistivity R, Mhmm2/m | 0,054 |
Disadvantages
Manufacturing associated with a number of difficulties. Tungsten is a rare element in the earth’s lithosphere. Under normal conditions it is not sufficiently plastic. The difficulty of obtaining it in its pure form, rather complicated processing affects the final product cost. This wire is very heavy.
Manufacturer
Tungsten wire is made from a roll in a rotary forging machine powder shtabikov. Get the bars, the lug stretches into a tungsten wire with a diameter of 1 — 3 mm. Wire with smaller diameter is called a thread. It can also be produced with addition of chromium, cobalt, carbon. While its strength is increased by almost 1.3 times. Drawn tungsten wire groups A, B, C (black), brand WA, HF, VRN, also manufactured by way of powder metallurgy. One kilogram of tungsten rolled into a thread length of 3.5 kilometers. This is sufficient to produce 20 thousand bulbs, 60 watts. This gives you the opportunity to meet the demand of electrical production in the world only two railway wagons of tungsten per year.
Use
Mark WM used in x-ray technology and electronics, it is used the heaters and cathodes for electronic devices designed for operation in vibration, shock, t° 2100 °C. Brand VRN is the manufacture of springs, hooks, cathodes of gas-discharge and electronic equipment, glands, traverse and other parts that do not require tungsten with special additives.
High resistance and a unique light output, allow the use of a thin tungsten filament in incandescent lamps. Tungsten filament for lighting devices made in accordance with GOST 19671−91 from VA, VRN, RF, ∅ 19,5 mm — 1.5 mm. Also it is made of springs of electronic devices, spiral cathodes for electronic devices that are not loop-spiral cathodes, grids, heaters. A variety of filters, grids made of tungsten wire used in the chemical industry. This wire is used for the production of surgical instruments, parts of missiles, aircraft, textile machinery.
TUNGSTEN WIRE (GOST 18903−73)
| Grade tungsten wire | Surface condition | Group | Ø µm | Application |
|---|---|---|---|---|
| VA | Black | And | 10 — 1500 | Spiral heaters and cathodes for electronic devices and springs of semiconductor devices. Spiral lamps. |
| Black high manufacturability | HELL | 50 — 1500 | Cathodes and heaters, and directly heated cathodes in helical structures with the factor of the core 1 and 2.2 | |
| Black high-heat resistance | AE | 500 — 1200 | Directly heated spiral heaters and cathodes with the working temperature or the temperature of thermal treatment over 2,000°C | |
| Black | AP | 10 — 200 | Not spiral cathodes, grids, springs, loop heaters electronic devices. | |
| Purified | B | 11 — 500 | Hooks, support, spiral bulbs, springs, spiral cathodes and heaters of the gas-discharge and electronic devices. | |
| Purified and annealed | G | Mesh, loop heaters, asperuloside cathodes. Spiral for some special bulbs | ||
| Etched | T | 5 — 12 | Directly heated non-helical and spiral cathodes and heaters cathodes. Grid electronic devices. | |
| Pickled and annealed | IT | |||
| VM | Black | 11 — 1500 | Parts of the device and spirals of special incandescent lamps which are operated at a temperature of not more than 2100 °C under high mechanical loads (vibrations, shocks) | |
| VRN | 800 — 1500 | The bar, bushings and other parts that are not trebuyu doped tungsten. | ||
| W-7 | And | 20 — 1500 | Cathodes, hooks, springs and some gas discharge electronic devices | |
| VT-10 | 25 — 1500 | The cathodes of gas-discharge and electronic devices | ||
| VT-15 | 150 — 1500 |
Buy at best price
A large range of quality imported and domestic electrodes of different configurations in stock LLC «AVEK global» can satisfy any consumer. The quality of the finished product is ensured absolute compliance with all technological norms of production. The timing of orders is minimal. If necessary, you will receive detailed advice from experienced managers. For wholesale orders the company provides flexible discounts.