A variety of copper properties ensures its mass consumption in various fields of production. Excellent corrosion resistance, high electrical and thermal conductivity, good ductility. Most of all consumed copper (? 70%) is used in the electrical field; about 15% is spent on building construction; on the engineering needs and parts of machines and mechanisms accounts for about 5%; 8% goes to other areas, including arms, transport design. For manufacturing various grades of copper used in different areas of production. The electrical engineering and electronics, which demand the highest levels of conductivity, oxygen-free copper is used. This high purity copper, wherein the copper content of <99.9%. Prepared by the method of its cathode, that is, during electrolysis, and then melted under vacuum.
It should be noted that the oxygen-free copper has the following distinctive quality in comparison with the conventional copper:

-High electrical conductivity;
-High uniformity;
great clear coat capacity for cold deformation.
Due to the improved properties, oxygen-free copper is recommended for use in electric vacuum technology:
-vakuumnye capacitors;
Manufacturing of conductors;
Manufacturing of electronic devices;
Manufacturing of switchgear.
It is also important to its use in the space industry in the manufacture of superconductors, linear accelerators, electron beam welding equipment. In addition, oxygen-free copper has found its application in the areas of:
-microelectronics;
-priborostroenie;
-nuclear power;
-building;
-jewelry.
Specificity of copper different labels are not determined by the interest component of copper (difference> 0.5%), and the interest component of certain impurities. Marking copper high-purity oxygen-free:
- ?00b ( Cu-OFE, OFE-OK )- Cu = 99,9988% - 99,9991%; O2 = 0.0001% ; P= 0.0003%.
- ?0b ( Cu-PHC, OF-Cu )- Cu = 99.97% ; O2 = 0.001% ; P = 0.002%.
- ?1b ( Cu-OF, Cu-OF1 )- Cu = 99.95% ; O2 = 0.003% ; P = 0.002%.

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