Comparison between Copper and Aluminium Conductor

Comparison between Copper and Aluminium Conductor


Aluminium: 


Aluminium is a malleable and ductile metal with a soft white colour. It has a melting point of 655 degrees Celsius and a boiling point of 20570Celsius. At 20 degrees Celsius, it has a density of 2.7 grammes / square centimetre. Pure aluminium has a thermal conductivity of 0.503 cal/ cm sec/°C. At 20°C, Aluminium has a temperature coefficient of 0.0035 per °C. 2.8 x 10-8 ohm-m is its resistivity. It has a high corrosion resistance as well as a high resistance to touch. Its tensile strength ranges from 0.95 to 1.57 tonnes / square centimetre and it cannot be soldered. When exposed to air, an oxide coat forms with a tensile strength of 9 kg/square mm.


Comparison between Copper and Aluminium:


Aluminium is displacing copper in all fields due to its abundant supply and low cost. The following are some of the points that indicate how the two are similar:

(a) Both are strong heat and electricity conductors, ductile and malleable, and corrosion-resistant.

(b) Both are extremely efficient and long-lasting and can be utilised as wire, cable, and sheets in both low and high voltage applications.

(c) Because aluminium is lighter than copper, it is more suited for lighter parts such as dials and metre pointers.

(d) The cross-sectional area of aluminium is 62% greater than that of copper for the same length and resistance.

(e) Aluminum has a conductivity of 75% of copper's.

(f) Since aluminium is brittle, it cannot be handled roughly, but copper is soft and malleable. It can withstand a lot of abuse, such as twisting and bending.

(g) Aluminium is more cold-resistant than copper.

(h) Copper is more expensive than aluminium.

Sreejith Hrishikesan

Sreejith Hrishikesan is a ME post graduate and has been worked as an Assistant Professor in Electronics Department in KMP College of Engineering, Ernakulam. For Assignments and Projects, Whatsapp on 8289838099.

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