History of molybdenum. Physical and mechanical properties.
History
The name of this metal comes from the ancient Greek word "ΜΌΛΥΒΔΟΣ", meaning lead. The discoverer of molybdenum was the Swedish chemist Carl Scheele in 1778, but as early as the 11th and 13th centuries in Japan they forged edged weapons from molybdenum.
Physical Characteristics of Molybdenum
| Description | Designation |
|---|---|
| Temperature of obtaining the given characteristics t ° C | 20°С |
| Coefficient of linear thermal expansion α [1/°C] | 4,9x10-6 |
| Density [g/cm3] 10.2 | 10,2 |
| Melting point t°C | 2620°С |
| Specific heat capacity (t° 20 °C) C [kJ/(kg-cold)] | 0,256 |
| Thermal conductivity K [W/(m-K) | 142 |
| Specific electrical resistance R Ohmxmm2/m | 0,054 |
Molybdenum has remarkable mechanical strength and corrosion resistance. Molybdenum wire is twice as light as tungsten wire, so it has a higher specific strength (up to t° +1370°C).
Chemical properties
Molybdenum is soluble in hydrochloric and sulfuric acids (t° 80°C). Nitric acid and aqua regia dissolve it only at 80°C. Impurities of carbon, oxygen, silicon, aluminum, nitrogen, iron, sulfur, calcium, phosphorus significantly change its properties. Most of these impurities increase brittleness. Oxygen is considered the most harmful of all impurities.
Supplier
We offer to buy molybdenum alloys from specialized warehouses of the supplier Evek GmbH with delivery in any city. Fully compliant with modern quality standards. The supplier Evek GmbH offers to buy molybdenum alloys today. Timely delivery is ensured by representative offices in Eastern European cities.
Buy, bargain price
We offer molybdenum alloys, price - determined by the technological features of production without including additional costs. On the website of the company displays information on the latest arrivals of products. Products with non-standard parameters can be ordered. We have the best price-quality ratio for the entire range of products. In the segment of heat-resistant alloys Evek GmbH is a profitable supplier.
