History of tungsten. Physical and mechanical properties.
Are you interested in the history and properties of tungsten? Supplier Avlob offers to buy rare and refractory metals at a bargain price. The supplier guarantees the timely delivery of products to any specified address. Regular customers can take advantage of discount discounts. The price is the best in this segment.
Technical specifications
Tungsten leads into the group of the most refractory metals, which is why it is used to produce the most important products. According to its refractoriness, only carbon precedes it. In normal conditions, this metal does not react with any chemical substances, it is widely used in the metallurgical industry due to its refractory properties. The density of tungsten is identical to that of gold, correspondingly: 19.30 g / cm³ vs. 19.32 g / cm³. After the melting point of tungsten was determined: 3387−3422 ° C, this metal was used to make filament in lamps, heating devices and cathode-ray tubes. Supplier Avlob offers to buy tungsten alloys at a bargain price. The price is the best in this segment of rental.
Physical properties
| Description | Notation |
|---|---|
| Chemical symbol | W |
| Coefficient of linear thermal expansion α [1 / degree] | 43x10 -6 |
| Density [g / cm3] | 19.3 |
| Temporary tensile strength kg / mm2 | 35 |
| Specific heat at 20 ° C [kJ / (kg · deg)] | 0.134 |
| Thermal conductivity K [W / (m · K)] | 300,173 |
| Specific electrical resistance R Ohmmm 2 / m | 0.054 |
Tungsten alloys are indifferent at high temperatures in vacuum, therefore they are used in X-ray machine targets, and also under load in special crucibles. By its nature, pure tungsten is a ductile and flexible metal, but in the presence of scanty carbon impurities it becomes incredibly hard. Due to its chemical resistance, it does not interact with nitric, hydrochloric and any other mixture of acids. To force the metal to react with acids, it must be heated, then tungsten is dissolved by «royal vodka» and reacts with chlorine or sulfur.
Delivery, price
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