The history of copper. Physical and mechanical properties.
Electrovek-steel company sells copper blanks in any form at affordable prices from the manufacturer: hot and cold rolled products, ingots, forgings. The supplier provides prompt delivery of the ordered semi-finished products to the address specified by the customer.
The history of copper, its physical and chemical properties
Copper was first obtained from sulfide pyrite, mined in the ancient Greek mines in Cyprus, from which it received its Latin name Cuprum. By the prevalence of copper is not a leader on the planet, occupying only 23rd place, but the long period of its practical use by man, as well as a number of useful properties have caused the wide use of this metal, especially in the electrical industry.
In accordance with GOST 869, copper is produced in two grades — M0 and M1. Mandatory components of the metal are chemical elements such as bismuth, tin, arsenic, iron, nickel, lead, tin and zinc, as well as sulfur and oxygen. The total number of admixtures in copper grade M0 should not exceed 0.05%, and in copper M1 — 0.1%.
The main physical properties of copper are given below:
- Melting point, 0 С — 1084;
- Density at room temperature, g / cm 3 — 8.89;
- Thermal conductivity, W / kgK — 385;
- Specific electrical resistance, μΩ / m — 0,01724;
Copper refers to the number of corrosion-inactive metals, reacting in a humid atmosphere only with particularly strong oxidants: for example, the metal dissolves in concentrated nitric acid.
Buy copper wire at an attractive price the manufacturer offers the company Elektrovek-steel. The supplier ensures the delivery of products to the point marked by the customer.
Mechanical properties of copper
Copper is considered a metal that is processed mechanically well. However, the viscosity and ductility of copper causes the metal of the workpiece to adhere to the cutting tool. During plastic deformation, the metal intensively hardens, which results in a decrease in the relative elongation of copper by half when the metal reaches critical deformation levels.
Consumer characteristics of copper:
|Index||The numerical value for|
|Deformed copper||Annealed copper|
|Limit of time resistance, MPa||340… 450||250… 280|
|Relative narrowing of the cross-section,%||40… 60||65… 85|
|Relative elongation at tension,%||4… 6||45… 60|
|Hardness of Brinell, HB||90… 115||40… 55|
To buy copper of various brands at the price of the manufacturer offers the company Elektrovek-steel. The supplier guarantees the prompt delivery of products to the address set by the customer.