Aluminium is also strongly attracted to oxygen that it can only be refined using huge

amounts of electrical energy. However, refining aluminium from its ore is still a costly

process. This is why aluminium is often recycled and it can be remelted easily. And with

its low melting point of around 600 degrees C, it can also be used in a wide range of

industrial processes.

Aluminium can be welded using a very high temperature such as arc-welding machine and

a stick of aluminum. Aluminium can also be brazed or soldered with other metals and can

also be made harder and strong as steel when formed as an alloy. An alloy is a mixture of

various elements designed to give that special characteristics that pure metals do not

have. Lightweight and resistance to corrosion are some of its advantages.