It is possible that the material for the Wheels of history served as the tungsten sheet.
Tungsten sheet is of exceptional structural qualities. It is extremely heat-resistant, heat-resistant, resilient, with the lowest among the metals coefficient of thermal expansion. It is resistant to corrosion and action of many aggressive factors. He has a very high resistivity and resistance to temperature creep, good thermal conductivity. Reliability and durability of the sheet in extreme conditions made it irreplaceable for the modern industry.
The high cost of production. Tungsten is a rare metal of the earth’s crust, it is difficult to produce in pure form, it is refractory and poorly to treatment. At normal temperatures the metal is not sufficiently plastic. Furthermore, it is very heavy, like gold.
The original Fort in the form of flat blanks. heated and rolled at high speed while the metal is hot. So at high temperature to reduce the oxidation of tungsten to a minimum, is used in plating. As soon as the sheet becomes thinner, it requires less temperature for processing. Foil is rolled at normal temperatures. The sheet may be printed in the products of any form. For stamping, cutting etc. the sheet is warmed up again. To protect from oxidation, all operations are carried out in a hydrogen atmosphere. Surface oxides are removed by calcination in the atmosphere of H2 at 1000 °C or a hot solution of caustic soda.
Total impurities ≤122 excluding C, Cl, H, F, N, O, P, S.
Total impurities ≤160 excluding C, Cl, H, F, N, O, P, S.
Compound tungsten sheets may spot or butt welding. However, the seam, is usually fragile. More reliable riveted connection. This tungsten is easily soldered with Nickel, copper or silver under the protection of inert atmosphere. For the manufacture of parts of electronic lamps tungsten welded with Nickel by the method of resistance.
Tungsten sheet is indispensable in electronics and x-ray technology. In metallurgy for heat-resistant thermal barrier, making boats, high-temperature containers, etc., a Thin ribbon of tungsten is used to input electrodes in electrical devices and heating elements of electric furnaces. The development of modern rocketry, nuclear energy, engineering, industrial chemicals stimulate the demand for tungsten sheet. The rapidly growing need for it in the radio and MIC. Most often the sheet used in the production of:
- Heat-resistant parts
- Refractory shields
- Lighting and electrical vacuum devices
- Heat-resistant foil.
|WA SVI||P/M||Cold-rolled (Y)Annealing for stress relieving, (m)||0.10−0.20||30−250||50−500|
|WA SVI||P/M||Cold-rolled (Y)Annealing for stress relieving, (m)||> 0.20−0.4||50−250||50−500|
|WA SVI||P/M||HR ®Annealing for stress relieving, (m)||> 0.40−4.0||50−200||50−200|
|WA SVI||P/M||HR ®Annealing for stress relieving, (m)||> 4.0−6.0||50−200||50−200|
|Thickness||Grade I||Grade II||Width tolerance||Length tolerance|
Certified supply tungsten sheet. The specification included data on the percentage composition and mechanical properties of products. We can easily buy in bulk any semi-finished products for large-scale production. We also work with retail buyers. A high level of service and speed of service are the face of our company.
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On the website LLC «Electrocentury-steel» reflects the most current information on the acquisition of tungsten rental today. Experienced managers who are always ready to provide qualified advice on any current issues. Sell semi-finished products of rare and non-ferrous at a competitive price. The products are manufactured on the most modern equipment and meets the quality requirements of Russian state standard and international quality standards. Regular customers receive a discount system of discounts.