Tungsten powder. Brand chemical composition.
Tungsten is a hard refractory metal, the element No. 74 of the periodic table, denoted as W, has a density of 19.25 g/cm3, t° melting point of 3422 °C and t° boil over 5500 °C. Tungsten powder is a heavy particulate mass with high hardness and refractoriness. It is the basis of the compact metal. First get rods that are blanks, tungsten bars, wires, sheets, and the basis for the sintering of solid heat-resistant alloys by powder metallurgy.
|Atomic (molar) mass, g/mol||The degree of oxidation||Density [g/cm3]||The melting temperature t°C||The boiling point of t°C||The heat of fusion kJ/kg|
|Of 183.84||0, 2, 3, 4, 5, 6||19,25||3422°C||5500°C||191|
Brand tungsten powder
The main brands are: EP PVV (highly active tungsten powder), PVN (low-level tungsten powder), HTP (technical tungsten powder). They are produced according to TU 48−19−72−92 «Tungsten powder. Those. conditions.» The average diameter of the grains of powder brand PVN and PVT is 3.5 — 6 µm (not more than 40% of the grains of powder tungsten brand PVN are larger than 4 µm), PVV of 0.8 — 1.7 µm.
Hard and refractory tungsten is the basis of tool and high speed steels, wear-resistant and heat-resistant steels, consumable electrodes and electric lighting equipment. Tungsten powder is used as the main component of tool and high speed steels or alloying additives, and heat-resistant and wear-resistant alloys (such as stellites). The basis of solid wolframalpha alloy of the type VK is tungsten carbide. From tungsten powder to produce a tungsten non-consumable electrodes for welding.
Tungsten powder is produced in three grades, depending on the scope and source of raw materials: Powder of tungsten TU-48−19−72−79
|mark||The name of the powder||The feedstock|
|PVV||highly active tungsten powder||Tungsten oxide, ammonium paratungstate varieties, or ammonium paratungstate high purity.|
|PVN||tungsten powder low||Tungsten oxide, ammonium paratungstate varieties, or mamaliberty the ammonium paratungstate.|
|HTP||tungsten powder technical||Tungsten oxide, ammonium paratungstate or ammonium paratungstate.|
|(O2 and moisture)||0,25||0,35||0,2|
Mass fraction of tungsten is metal-based and undetectable concomitant impurities.
The dispersion of tungsten powder characterized by average particle diameter by Fisher, and shall meet the following standards.
|Mark||according to Fischer, the average grain diameter, µm|
|PVV||from 0.8 to 1.7|
|PVN||from 3.5 to 6.0|
|HTP||from 3.5 to 6.0|
— powder PVN content of granules greater than 4 microns must be up to 40%.
bulk specific weight of the powder brands PVN and PVT = 3,0 — 5,5 g/cm3
— bulk density for the brand PVV is not a rejection criterion and may not be determined.
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In stock, LLC «Electrocentury-steel» a wide range of high quality metal powders at the best prices. Tungsten powder comes in banks with gross weight up to 70 kg Warranty shelf life 24 months from date of manufacture. All products have a quality certificate of conformity with standards and technical conditions. The certificate is marked manufacturer, brand of powder, the chemical composition and properties. Implementation of orders in the shortest possible time. Wholesale buyers are offered preferential discounts.