Compare copper and aluminium.
Copper
|
Aluminium
|
Resistivity is less
|
Resistivity is more
|
More weight
|
Low weight
|
Mechanically strong
|
Mechanically weaker
|
Specific Gravity high
|
Specific Gravity Low
|
Welding & soldering is easy
|
Difficult to weld & solder
|
Affected chemically
|
Oxidizes when open
|
Does not break when bend
|
Breaks when bend
|
Tensile strength is double of that of aluminum
|
Tensile strength is half of that of copper
|
Used for winding
|
Used for overhead lines
|