Tungsten wire VA 8 micron - 500 micron
|Mark||Analogue||W. Nr.||Aisi Uns||En||Order|
|ВА||EHF||WP||EWP||Delivery from the stock, in stock|
|ВРН||Delivery from the stock, in stock|
|ВТ-7||WThO0.7||Delivery from the stock, in stock|
|ВТ-10||WThO1||Delivery from the stock, in stock|
|ВТ-15||Delivery from the stock, in stock|
It would seem that it can be simpler than wire — one of most popular metal products? Moreover, as Oscar Wilde argued: in life — simpler, more correct. However, production of tungsten wire is associated with number of difficulties.
It’s made of most refractory of metals with melting point of + 3422 °C. Tungsten has high strength, heat resistance, resistance, in aggressive industrial environments. Such wire retains its hardness during strong heating, is wear-resistant, wire has minimum coefficient of thermal expansion, which allows it to be used for most critical products. Wire has highest modulus of compression and tension, high electrical resistance, excellent thermal conductivity. Wear resistance, high resistance to thermal creep made it indispensable in modern industry.
Wire of group A, B, C (black) of grades VA, VRN, VCh is made using powder metallurgy technology. Workpieces are powder racks that are heated and rolled by rotary forging machine to diameter of 1−10 mm. Thinner wire is called thread. Chromium, cobalt, carbon can be added to its composition. In this case, its strength is increased by 30%. 1 gram of tungsten is rolled into thread 3.5 meters long, sufficient for manufacture of 700 60-watt lamps. Thanks to this, needs of world electrical engineering industry are met by 2 tungsten rail cars per year.
For production of cathodes and heaters of electronic devices of electronic and x-ray equipment, BM grade tungsten wire is used, which is resistant to shock and vibration at t° up to 2100 °C. BPH brand — for springs, hooks, cathodes of electronic and gas-discharge devices, bushings, traverse and other parts that do not require tungsten with special additives. Due to its high electrical resistance and unique light output, tungsten filament is indispensable in lighting fixtures. Tungsten filament for light sources is produced according to GOST 19 671−91 from grades VA, VCh, VRN, with diameter of 19.5 μm — 1.5 mm. It serves for production of spiral cathodes of electronic devices, springs of electronic and semiconductor devices, loop-free cathodes, heaters, etc. Tungsten nets and filters are used in chemical industry. Tungsten wire is not only for production of surgical instruments. In mechanical engineering, textile industry, aircraft and rocketry, most critical components are made from it. Non-consumable tungsten electrodes have exceptional heat resistance and operational reliability. They allow you to fasten sheets of steel, copper, aluminum, brass with thin and even seam.
TUNGSTEN WIRE GOST 18 903−73
|Tungsten brand||Group||Surface condition||Ø, microns||Appointment|
|VA||A||Black||10 — 1500||Spiral lamps. Spiral cathodes and heaters of electronic devices, semiconductor device springs.|
|VA||AD||Black high-tech||50 — 1500||Cathode heaters and straight filament cathodes of spiral design with core factor 1 — 2.2|
|VA||AE||Black high heat resistance||500 — 1200||Straight spiral cathodes and cathode heaters with working t° or t° heat treatment above 2000 °С|
|VA||AP||Black||10 — 200||Loop heaters, grids and springs of electronic devices, non-spiral cathodes.|
|VA||B||Purified||11 — 500||Supports, hooks, springs, spirals of incandescent lamps, spiral-shaped heaters and cathodes of electronic and gas-discharge devices.|
|VA||G||Purified and annealed||11 — 500||Loop heaters, grids, non-spiral cathodes. Spirals of some special glow lamps.|
|VA||T||Pickled||5 — 12||Grids of electronic devices. Cathode heaters and straight filament helical and non-helical cathodes.|
|VA||TO||Pickled and annealed||5 — 12||Grids of electronic devices. Cathode heaters and straight filament helical and non-helical cathodes.|
|VM||A||Black||11 — 1500||Spiraling special glow lamps and parts of devices operating at t° up to 2100 °C with increased mechanical loads (shock, vibration)|
|VRN||A||Black||800 — 1500||Glands, traverses and other parts not requiring alloyed tungsten.|
|VT-7||A||Black||20 — 1500||Springs, hooks, cathodes of some electronic and gas-discharge devices|
|VT -10||A||Black||25 — 1500||Cathodes of electronic and gas-discharge devices|
|VT -15||A||Black||150 — 1500||Cathodes of electronic and gas-discharge devices|
Buy at bargain price
In warehouse of LLC Elektrovek-steel a wide selection of high-quality tungsten rolled products at price that will satisfy any customer. When bulk orders are preferential discounts.