A brass pipe nonferrous metal tube. Is suppressed and pulled by a seamless tube. Common brass pipe material (H59, H62, H65, H68). Brass tube: it is characterized by light weight, good thermal conductivity, high low temperature strength, with high strength of general metal, at the same time than general metal easy to bend, easy to twist, not easy to crack, not easy to break, and has a certain resistance to frost bloat and impact resistance is often used in the manufacture of heat exchange equipment (such as condenser, etc.). Also used to assembling low temperature lines in oxygen production equipment. Copper pipe with small diameter is often used to transport pressure liquid (such as lubrication system, oil pressure system, etc.) and used as instrument pressure measuring pipe. It also has the characteristics of strong, corrosion resistance, and become the first choice of water pipe, heating, refrigeration pipe installation of residential commercial housing.
Pure copper is rose red metal, the surface of copper oxide film is purple, so industrial pure copper is often called copper or electrolytic copper. A density of 8 - 9 g/cm3 with a melting point of 1083°C. Pure copper has good electrical conductivity, widely used to manufacture wires, cables, brushes, etc.; good thermal conductivity, commonly used to manufacture magnetic instruments and instruments, such as compass, aviation instrument, etc. Excellent plasticity, easy to hot pressure and cold pressure processing, can be made into pipe, rod, wire, strip, strip, plate, foil and other copper materials
Pure copper resistivity, if the theoretical value of various materials into 1 m long, cross-sectional area 1 square millimeter of wire, in 20ºC to measure their resistance (called the resistivity of the material) and compare, the minimum resistivity of silver, followed by copper, aluminum, tungsten, iron, manganese copper, nickel-chromium alloy order, resistivity increases in turn.
The resistivity of aluminum wire is more than 1.5 times that of copper wire, and its resistivity is p=0.0294 Ω mm2/ M, the resistivity of copper p=0.01851 Ω·mm2 / m, there will be some difference in resistivity with temperature
