Introduction to red copper

Purple copper material name

Red copper, also known as copper, industrial copper metal, purity is higher than 99.5%, purple-red, also known as pure copper. It has excellent electrical conductivity, thermal conductivity, corrosion resistance and welding properties, at room temperature conductivity is second only to silver. Processing copper, which is divided into four grades, that is, one, two, three and four copper, purity were 99.95%, 99.90%, 99.70% and 99.5%; that is, the so-called T1, T2, T3.

Red copper characteristics

Good electrical and thermal conductivity, corrosion resistance and processing performance, can be welded and brazed. Containing less conductive, thermal conductivity impurities, trace amounts of oxygen on the conductive, thermal conductivity and processing performance impact is not significant, but easy to cause “hydrogen disease”, should not be in the high temperature (such as > 370 ℃) reducing atmosphere in the processing (annealing, welding, etc.) and use. Often contains oxygen, sulfur, lead, arsenic, bismuth, phosphorus and other impurities. Has excellent electrical conductivity, thermal conductivity, moderate mechanical properties. Can be used to formulate copper alloys and for alloying elements. Widely used in electrical and electronic fields for electrical and thermal conductivity materials. Reflector furnace and other fire smelting copper, copper refining electrolysis. Preparation or source: The important copper ores in nature are chalcopyrite, chalcopyrite, chalcopyrite and malachite, but the grade is low. Can be calcined by sulfide ores to remove sulfur and a small amount of silica and coke co-fusion of crude copper, and then reduced to bubble copper, and then refined by electrolysis. Copper in the trace impurities on copper's electrical and thermal conductivity has a serious impact. Among them, titanium, phosphorus, iron, silicon and other significant reduction in conductivity, while cadmium, zinc and other effects are very small. Oxygen, sulfur, selenium, tellurium and other solid solubility in copper is very small, can be generated with the copper brittle compounds, the conductivity of the impact is not significant, but can reduce the processing plasticity. Ordinary copper in a reducing atmosphere containing hydrogen or carbon monoxide when heated, hydrogen or carbon monoxide and easy to grain boundaries of cuprous oxide (Cu2O) role, resulting in high-pressure water vapor or carbon dioxide gas, can make the copper rupture. This phenomenon is often called copper “hydrogen disease”. Oxygen is harmful to the solderability of copper. Bismuth or lead and copper to generate a low melting point eutectic, so that the copper produces hot brittle; and brittle bismuth is a thin film distributed in the grain boundaries, but also make the copper produce cold brittle. Phosphorus can significantly reduce the electrical conductivity of copper, but can improve the fluidity of copper, improve solderability. Moderate amount of lead, tellurium, sulfur, etc. can improve the machinability. Lighter weight, good thermal conductivity, high strength at low temperatures. Commonly used in the manufacture of heat transfer equipment (such as condensers, etc.). Also used in oxygen equipment for the assembly of low-temperature piping. Small diameter copper tube is commonly used in the transportation of pressurized liquids (such as lubrication systems, hydraulic systems, etc.) and used as instrumentation pressure measurement tubes and so on.

Copper pipe has a strong, corrosion-resistant properties, and become a modern contractor in all residential commercial housing water piping, heating, cooling piping installation of choice.

1, Copper is economical. Because copper pipe is easy to process and connect, make it in the installation, can save materials and total cost, stability can be reliable, can save maintenance.

2, Copper is lightweight. For the same inner diameter of the stranded threaded pipe, copper pipe does not require the thickness of ferrous metal. When installed, copper pipe transportation costs are smaller, maintenance is easier and takes up less space.

3, Copper can change its shape. Because copper pipe can be bent and deformed, it can often be made into elbows and joints, and smooth bends allow copper pipe to be bent at any angle.

4, Copper is easy to connect.

5, Copper is safe. No leakage, no combustion, no toxic gases, corrosion resistance.