Molybdenum

Lord sophisticated, but not malicious. Albert Einstein.

general characteristics

Molybdenum — 42-th element of the periodic table of DI Mendeleev, the chemical symbol Mo. The atomic weight 95.94, density of 10.22 g / cm³, melting t ° + 2617 ° C. This heavy metal is silver color. In a translation from Greek means μόλυβδος lead. In air at room temperature it is oxidized little, hardly reacts with hydrogen to the melting temperature, but at t °> 400 ° C is easily oxidized in air. Heat treatment is not hardened. Hardening is achieved only for semi hardening, the required mechanical quality of products is achieved by annealing and deformation. Molybdenum — one of the few alloying elements which simultaneously strengthens the alloy and increase resistance to corrosion. Even in from the XI century in Japan, it began to be applied for the production of knives.

Physicochemical characteristics

Nitric acid and aqua regia dissolved molybdenum only at t ° 100 ° C. With sulfuric and hydrochloric acids, it reacts ranging from 80 ° C, breaks in hot alkaline solutions. Impurities ₂ O, C, Si, N _2, Al, Fe, P, Ca and S, which may be technically molybdenum from hundredths to hundred-thousandth of one percent, a significant influence on its characteristics. Most of them makes the metal more brittle. Especially harmful impurity is O _2. When its content 0,0008−0,004% low melting oxides leads to a dramatic increase in the brittleness of the metal and reducing the ability of plastic deformation, particularly in the presence of N ₂ doubles, and C. In the case of increasing the proportion of oxygen in excess of 0.015% metal becomes brittle and pressure treatment is not available .

application

The claimed technique of molybdenum as a refractory material to maintain the strength at a temperature up to 2000 ° C. For heat-resistant alloys doped spend about ¾ of molybdenum produced. It improves the hardenability and rollability alloys eliminates the brittleness, improves heat resistance. Such alloys are the basis of refractory corrosion of constructional materials, for example in jet nozzles. In the form of a thin wire it is applied in electronic industry. From this leafy produce anodes, cathodes springs, meshes. Molybdenum ribbon (wire) is used to input current to the lamp. The coefficient of thermal expansion of molybdenum and glass are almost identical, so it is used for electrical contacts soldered to the glass. It is also used in the construction of high-temperature furnaces for glass electrodes baths for the manufacture of optical glass. Derivatives molybdenum — oxides, sulphides and molybdates — are components glazes, dyes, pigments and catalysts of chemical reactions. MoF ₆ is used for applying a metallic coating to various molybdenum.

Piercing mandrel molybdenum is used for punching seamless stainless steel and steel pipes, drill steels and alloy special steels. Below is their range.

Buy at the best price

In stock company «Electrovek-steel» in the presence of a wide range of rentals of rare and refractory metals. The price of molybdenum is determined by the technological features of production without including additional costs. All products are certified. We easily purchase wholesale products needed for large-scale projects, we also offer favorable conditions for retail customers. Technological equipment of each production stage gives us an opportunity to carry out individual orders of non-standard options. The products are manufactured in strict compliance with the requirements of the technological process that guarantees the highest quality. Evek.org on our website. you will find all the necessary information. We are waiting for your orders.