What is the performance ratio of aluminum cables to copper core cables?

1.Conductivity
With the same specifications of the cable for comparison, the conductivity of the aluminum alloy conductor is the most commonly used benchmark material copper 61%, the specific gravity of the aluminum alloy is 2.7g/cm³, the specific gravity of the copper 8.9g/cm³, in the same volume, the weight of aluminum is about one-third of the weight of the copper, according to the calculations, in order to meet the same electrical conductivity under the premise of the aluminum alloy power cables is the same load capacity of copper cables, half of the weight.
2. Creep resistance
Aluminum alloy conductor special alloy formula and heat treatment process greatly reduces the metal in the heat and pressure "creep" tendency, and copper conductor creep performance is basically the same as the copper conductor manufacturing connection as stable.
3. Corrosion resistance
Compared with copper-core cables, aluminum alloy power cables have higher corrosion resistance, able to withstand various forms of corrosion; with better oxidation resistance, oxidation corrosion resistance for copper-core cables 10 to 100 times. In sulfur-containing environments, such as railroad tunnels and other similar places, the corrosion resistance of aluminum alloy power cables is much better than that of copper-core cables.
4. Mechanical properties
(1) bending performance. According to GB/T12706 in the installation of copper cable bending radius, copper cable bending radius is 10-20 times the diameter of the cable, aluminum alloy power cable bending radius of a minimum of 7 times the diameter of the cable, the use of aluminum alloy power cables to reduce the installation layout of the space, reducing the cost of installation, easier to lay.
(2) Flexibility. Aluminum alloy power cables have stronger flexibility than copper core cables, even if repeated force, will not produce cracks. Reduces the safety hazards arising from the installation process.
(3) Tensile strength and elongation. The tensile strength of aluminum alloy power cable is 1.3 times that of copper core cable, and the elongation rate can reach or exceed 30%, which enhances the reliability and aesthetics of long span installation.

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