Aluminum alloy cable and aluminum core cable performance comparison

[China Aluminum Network] Aluminum alloy cable and aluminum core cable performance have some differences, the corrosion resistance of pure aluminum is better than copper, but the corrosion resistance of aluminum alloy is better than pure aluminum. Below we analyze the four aspects of corrosion resistance, mechanical properties, electrical conductivity, and creep resistance.
1. Corrosion resistance The corrosion resistance of pure aluminum is better than that of copper. However, the corrosion resistance of aluminum alloy is better than that of pure aluminum. Because the addition of rare earth elements and other chemical elements in aluminum alloy can increase the corrosion resistance of aluminum alloys, especially the resistance to corrosion. The electrochemical corrosion performance solves the problem of electrochemical corrosion of pure aluminum at the joints.
Second, the mechanical properties of the former, tensile strength and elongation. Compared with pure aluminum conductors, aluminum alloy conductors have added special components and special processing techniques, which greatly increase the tensile strength, increase the elongation rate to 30%, and make them more safe and reliable.
Second, bending performance. The bending performance of aluminum core cable is very poor, bending is very easy to break, the bending radius of aluminum alloy power cable is 7 times the cable diameter, which is far better than that specified in GB/T 12706 "Small bending radius for cable installation" 10 times -20 times the cable diameter.
Third, flexibility can. As long as the pure aluminum cable is twisted by a certain number of angles, the conductor will crack or break, which may cause accidents. The aluminum alloy power cable can withstand tens of times of bending, eliminating the accidents during the installation and use of pure aluminum cables. The hidden danger greatly improves the safety and reliability.
Third, the conductive capacity Aluminum alloy conductor is added in the pure aluminum, rare earth, magnesium, copper, iron and other elements, the formation of the new conductor material through the alloy process. It is well known that the addition of many other alloying elements in aluminum reduces the electrical conductivity, and through process control, the electrical conductivity can be restored to a level close to that of pure aluminum, making it a similar current-carrying capacity to pure aluminum.
Fourth, the creep resistance of pure aluminum creep resistance is poor, due to the thermal expansion and contraction caused by the power disconnection will cause a large creep at the junction, after a long time will appear slack, increase the contact resistance caused by overheating, easy It caused an accident. The creep resistance of AA8000 series aluminum alloy is 300% of that of pure aluminum conductor, which greatly reduces the possibility of looseness of cable joints and improves the connection of conductors.