Copper - one of the well-known and very popular metal that has found widespread use in the production, including in electrical engineering. It is valued due to a number of its technical properties, such as ductility, a large electrical and thermal conductivity, good strength.
This material is resistant to many corrosive media: organic acid, alcohol, phenolic resins and others. However, it is very readily soluble in nitric acid and sulfuric acid. The peculiarity of the metal is that it oxidizes even at room temperature, so to obtain high purity copper and its melting is carried out in vacuum to give material - copper MV. Classification Metal Standard 859-2001 grades regulated, whereby copper vacuum must be less than 0.01% of oxygen impurities. It is used for manufacturing devices in the electric industry. In accordance with the two types of material can be distinguished production Technologies:

  • Oxygen-free copper - oxygen content of 0.001%;
  • Refined copper - 0.01% oxygen. Especially copper MB is its low resistivity, which for copper is 0,01707mkOm MB * m, the brand M0 - 0.01718 mO * m. Another important characteristic of the material is almost complete absence of oxygen and hydrogen in the composition of the metal. Since these elements lead to the appearance of blisters and cracks, or so-called "hydrogen disease." This effect occurs when metal articles of copper operating at temperatures above 200 C, thereby reducing the life of the product lines. Therefore, products which are operated at high temperatures, should be made of oxygen-free or refined grades. CF Copper is not "running", as the production technology requires a large resource consumption, this type of product is manufactured for a specific customer.

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