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Advantages and Disadvantages of Aluminum Alloy Cables
Posted: 2015-08-20 00:49:07  Hits: 7112
It’s common to find aluminum alloy cable in today’s building materials market, which is the latest high-tech product of the cable. Customers many pay much attention to its merits and demerits, let’s discuss in detail.
 
1. Creep resistance
The special technique of aluminum conductor can reduce the deformed tendency of aluminum alloy, compared to the pure aluminum, the resistance of aluminum alloy is increased by 300%, and thus it can avoid slack caused by cold flow or deformation.
 
2. Tensile strength and elongation
Compared to the pure aluminum conductor, the aluminum alloy one has special component and processing technology, therefore, aluminum alloy conductor can greatly improve the tensile strength and elongation rate increased to 30%, securer to use.
 
3. The thermal expansion coefficient
Thermal expansion coefficient is used to calculate the size of the change in temperature of the material. The copper and aluminum alloy have equivalent coefficient. The aluminum connector used in cooper and aluminum conductors for many years. Most of today’s electrical connectors are made of aluminum alloy. The expansion and contraction are exactly the same with aluminum alloy conductor and connector.
 
4. Connectivity
The electrical connectors made of aluminum alloy or copper are secure and stable. The components of aluminum alloy improved its connectivity, when the conductor annealing, added iron produced high resistance, even after overload and overheating, can also ensure the stability of the connection.
 
5. Strong weight bearing capacity
Aluminum alloy improves the tensile strength of pure aluminum; aluminum alloy cables can afford the weight of 4000 meters, but copper can only offer 2750 meters. This advantage can be particularly prominent when cables applied in large-span buildings, such as stadiums.
 
6. Anti-corrosion capacity
When aluminum expose to the air, it will form the oxide layer, it is the inherent corrosion resistance of aluminum, and the oxide layer can resist any kind of corrosion. The tombar thite added to the aluminum alloy can improve its resistance, which can particularly against the electrochemical corrosion. Aluminum can withstand the harsh environment so that it is widely used in the conductor of cables and many industrial fittings. Corrosion usually associated with different metal connection in a humid environment, we can take relative measurements to prevent corrosion, for example, using lubricate and antioxidants. Alkaline and acid soil will contribute to the corrosion of aluminum, so the protective casing is necessary. In sulfur-containing environments, such as railway tunnels and other similar places, the anti-corrosion capacity of aluminum alloy is superior to copper.
 
7. Flexibility
Aluminum alloy has good flexibility; its unique formula and processing technology greatly improve its flexibility. Compare to copper cables, aluminum alloy has 30% higher flexibility and 40% lower rebound. Copper cable has 10 to 20 times diameters than it bend radius, but aluminum alloy only 7 times so it is easier to connect terminals.