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Sleeve copper

Sleeve copper

Supplier — AvekGlob company — offers at reasonable prices from the manufacturer copper bushings in a wide range of diameters, heights and wall thickness. The supplier guarantees the timely delivery of products to any address specified by the consumer.

Technical specifications

Copper bushings are made from copper rolled pipes, followed by cutting into size and drafting parts of the semi-finished product into the required size bourt. The starting blanks are obtained using crystallization processes, solid state and other ultra-high purification processes, for example, by sublimation. Copper bushes of reduced purity (less than 99% copper) are obtained from secondary metal. Copper bushings of imported production are produced in accordance with the technical requirements of ASTM B30−16 standard, domestic copper bushings are manufactured in accordance with GOST 493−79.

Urgency of application

Copper bushings are used in such industries as hydropower, machine-tool construction, the production of automobile and tractor engines, mining, road construction machinery, aviation. The use of copper bushes contributes to the improvement of frictional conditions in friction pairs, reduces the specific energy costs and heat losses, increases the efficiency of the devices.

Chemical composition

GOST 193−2015 sets the following composition of the material of copper bushings:

       
Mark of copper in accordance with GOST 859−78 International designation Mass fraction of copper,%, not less than Specific electrical resistance, Ohm, not more than
M00b Cu-OFE 99.99 17,0710
M0b Cu-OF 99.97
(copper + silver)
17.2410
M1b Cu-OF 99.95
(copper + silver)
17.2410
M1 Cu-ETF 99.90
(copper + silver)
17.2410

Note. According to the consumer’s instructions for use in mechanical components and gears, the boundary friction coefficient is also indicated under different lubrication conditions.

Physical and mechanical properties

  • Density, kg / m 3 — 8890;
  • Melting point, 0 С — 1084;
  • Specific heat at room temperature, kJ / kggrad — 385;
  • Coefficient of thermal conductivity at room temperature, W / mdg — 392;
  • The limit of the temporary resistance at tension, MPa — 300… 350 (depending on the grade of copper):
  • Yield strength, MPa — 90… 180 (depending on the grade of copper):
  • Hardness according to Brinell, HB, not more than 60… 110 (depending on the grade of copper).

Assortment

GOST 193−2015 provides for the supply of copper bushings from tubular billets with a diameter of up to 250… 255 mm and height according to the requirement of the consumer. The raw materials for production are copper cathodes.

Supplier — AvekGlob company — offers to purchase copper bushings in a wide range of sizes and weights. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.