Rod, pipe, wire made of copper
Relevance
Copper is known to humanity since ancient times. This metal is used not only in different sectors of industry but in culture, art, and everyday life as well. There is still no substitution for copper in electrical engineering. It is not equalled among other non-iron metals.
An original color of copper is red. Sometimes it can have a faint tinge of pink depending on residual elements. Classical red copper has golden tint. Oxidized copper sheets with ageing effect perfectly fit for roofing. Patinated copper sheet is popular in building on a large scale. Golden brass or bronze sheet is actively used by modern designers.
Technical characteristics
Copper relates to a group of heavy non-iron metals. It is obtained by ore processing and reworking of copper millberry. It is malleable, forgeable. By electrical conductivity, it ranks second after silver. Due to this, copper is used at manufacture of wire, electrical terminals. But pure copper is inferior to its alloys by mechanical characteristics. In order to increase strength properties, there are made two copper alloys: brass (Cu+Zn) and bronze (Cu+Sn).
Physical properties of Cu
| Description | Identification |
| Atomic (molar) weight mole/h | 63.548 |
| Atomic number | 29 |
| Density [g/cm3] |
8.92 |
| Melting point is 1400° | 1085°С |
| Oxidation rate | 3, 2, 1, 0 |
| Heat conductivity K [V/m*K] | 401 |
| Molecular volume cm3/mole |
7.1 |
Where to buy copper
Lots of people do a reprocessing of copper from metal scrap and use it as the most efficient source. You can buy copper at large enterprises that gather metal. Let us consider where we can buy copper in bulk. Base of metal scrap gathering and further processing exists in any big city. It worth noting that copper price per one kilogram differs in small gathering bases and in large metal-processing factories. This is normal occurrence. When junking a copper, price of which can be cheaper than market price, you need to take into account that metal purity, quantity and distance barriers from processing factory influence on cost. Manufacture is specified by GOST 1639−78 and must be held by every enterpriser.
How much does copper cost on metal market
Cost is defined by several factors: global economic trend, domestic economy of country, nearness to processing center. Prices are proxy measures of economic stability in such spheres as electronics, techniques, energetic where copper is used as a basic material and reflect growth dynamics of manufacturing industries. Cost of copper is defined by stock exchange.
Copper alloys
Brass products possess high strength and corrosive resistance. Alloy grade CuZn38 contains 62% of Cu, 38% of Zn. C6782 contains 60% of Cu, 1% of Al, 1% of Fe, 38 of Zn. Brass products made by cold deformation are use in manufacture of wire, sheet, strip, radiator tube. That or these properties can be improved by adding another metal. Corrosion resistance increases with tin adding. Plumb allows improving cutting. Iron and nickel additives strengthen alloy to 550 MPa.
Bronze joints a large group of alloys that are perfectly workable. It marks with letters «Cu» at the beginning. It is divided into casting and deformable alloys. Tin additive (less than 60%) gives high plasticity and hardness. Percentage composition of metals defines bronze properties by allowing to manufacture casting, sheet, strips, bar, pipe out of it. Tin bronze casting alloy is widely used in manufacture of stop valves, bearing bushings.
| Bronze grade | Hardness HB 10-1 |
Melting point of casting (°С) | TS (MPa) |
| CuAl9Mn2Br | 70−90 MPa | 1080−1150° | 392−392 |
| CuSn5Zn5Pb5 | 60−70 MPa | 1250−1300° | 147−176 |
| CuSn8Zn4 | 75 MPa | 1100−1150° | 196−196 |
| CuAl9Fe3Br | 100 MPa | 1080−1150° | 490−392 |
Note: Range is given in σв (MPa) for chill-casting or sand-mold casting.
Application
Copper possesses unique combination of useful properties. It is used in all spheres of human activity. About 70% of commodity general total overall is spent on manufacture of electrical devices. 15% is spent on building constructional elements. 5% is spent on component part for cars. About 4% is spent for constructional elements in transportation sphere and for other industries including manufacture of fire-arms.
Alloying
Manufacture of electrical products is done out of different grades because almost all properties of copper can be manipulated by adding of various residual elements. Additives of oxygen-free copper are used in order to achieve a current conductivity. Sometimes there can be used oxygenate copper grades (where oxygen constitutes 0.02 — 0.04%). But usage of them impairs processes of welding treatment. Strength characteristics can be increased if to add arsenic in small quantity. Grades with lower oxygen content are more appropriate for casting. They are used in manufacture of pipes, wire, tubes, condensers, roofing.
Copper mill-products supplier
«Auremo» supplier offers to buy copper mill-products by wholesale. A wide range of goods is presented in stock. They comply with GOST and International Standards of quality. Copper alloys are always in stock. You can buy goods for the best price from copper mill-product supplier. Buy copper mill-products right now! Copper mill-products price is privileged for wholesale customers.
Buy at a bargain copper mill-products price
Wide range of products is presented in «Auremo» company. We offer non-iron metals for affordable price. Unlimited selection of goods will satisfy any customer. You can buy copper mill-products through our web-site or with a help of our managers in «Auremo» office. Quality of products is guaranteed by rigorous compliance with technological standards of manufacture. «Auremo» copper mill-products supplier offers the shortest terms of delivery. Copper mill-products price depends on order quantity and other supply conditions. We offer flexible discount system for wholesale buyers.
