God is subtle, but not malevolent. Albert Einstein.

General Characteristics

Molybdenum is the 42nd element of D. Mendeleev's periodic table, chemical symbol Mo. Its atomic weight is 95.94, density 10.22 g/cm³, t° of melting +2617°C. It is a heavy metal of a silvery hue. In Greek μόλυβδος means lead. It oxidizes little in the air at room temperature, practically does not interact with hydrogen up to melting point, but at t° > 400 ° C is easily oxidized in the air. It cannot be hardened by heat treatment. The hardening is achieved only by semi-hot nibbling, the necessary mechanical properties of products are achieved by annealing and deformation. Molybdenum is one of the rare alloying elements that harden the alloy and simultaneously increase resistance to corrosion. As early as the eleventh century it has been used in Japan for making cold steel weapons.

Physicochemical properties

Nitric acid and aqua regia dissolve molybdenum only at t°100°C. It reacts with sulfuric and hydrochloric acids from 80°C, it is destroyed in hot alkaline solutions. The impurities _O2, C, Si, _N2, Al, Fe, P, Ca and S, which may be in technical molybdenum from a hundredth to a hundredth of a percent, noticeably affect its characteristics. Most of them make the metal more brittle. A particularly harmful impurity is _O2. At its content of 0.0008-0.004%, fusible oxides lead to a sharp increase in the brittleness of the metal and a reduction in the ability to plastic deformation, especially in the paired presence of _N2, and C. If the oxygen fraction increases above 0.015%, the metal becomes brittle and unavailable for pressure treatment.

Applications

Molybdenum is used in engineering as a heat resistant material that retains its strength at temperatures up to 2000 °C. Approximately ¾ of molybdenum mined is used to alloy heat resistant alloys. It improves the hardenability and rollability of alloys, eliminates brittleness, and increases heat resistance. Such alloys serve as a basis for refractory corrosion-resistant construction materials, for example, in jet engine nozzles. It is used in the radio engineering industry in the form of thin wire. It is used to make sheet anodes, cathode springs and meshes. Molybdenum ribbon (wire) is used for current input into lamps. The coefficient of thermal expansion of glass and molybdenum are almost the same, so it is used for soldered electrical contacts in glass. It is also used in constructions of high-temperature furnaces and for electrodes of glass baths for production of optical glass. Molybdenum derivatives - oxides, sulfides and molybdates - are components of glazes, pigments of dyes and catalysts of chemical reactions. _MoF6 is used to apply metallic molybdenum to various coatings.

Piercing molybdenum mandrels are used for piercing seamless stainless steel and steel pipes, drilling steels and alloyed special steels. Their assortment is given below.

Buy at the best price

Evek GmbH has a wide range of rare and refractory metal products in stock. The price of molybdenum is determined by the technological characteristics of production, without the inclusion of additional costs. All products are certified. With us it is easy to buy the necessary products in bulk for large-scale projects, we also offer favorable conditions for retail customers. Technological completion of each production stage gives us the opportunity to fulfill individual orders of non-standard parameters. Products are manufactured with strict compliance with the requirements of technological process, which guarantees the highest quality. On our site you will find all the necessary information. We are waiting for your orders.