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The following table shows some of properties of Aluminium and their benefits:

1. Lightweight The specific gravity of Aluminium is 2.7, about one-third that of iron (7.9) and copper (8.9).

This feature is particularly important in transportation industries: for example, aircraft, automobiles; trains and ships. It contributes to energy saving in transporting, increasing loading capacity and speed. Aluminium is used as a material for high-risk

2. Excellent corrosion resistance When Aluminium is exposed to air, a thin oxidised film forms on the surface protecting the metal from corrosion. Anodising can make corrosion resistance even more effective.

This feature is utilised in construction, buildings, and household utensils.

3. Easy to work Aluminium can be easily fabricated into various forms such as foil, sheets, shapes, rods, tubes, and wires. It also displays excellent machinability and plasticity in bending, cutting, and drawing.

Aluminium is considered to be the best material for complex-sectioned hollow extrusion.

4. Non-toxic Aluminium itself is non-toxic and odourless. Its surface is smooth, easily washable, and hygienic because no germs can grow on it.

Due to these features, it is widely used in beverage cans, food packaging, cooking utensils, and in the fishery and dairy industries.

5. Strong at low temperatures Although steel becomes brittle at low temperatures, Aluminium increases in tensile strength and retains excellent quality.

Aluminium can be used in extreme environments

6. Strong The tensile strength of pure Aluminium is not high, but depending upon the alloy or temper, a strength of up to 60 kg/mm2 can be reached.

You can choose the alloy with the most suitable strength characteristics you need according to your application. Some alloys are stronger than ordinary steel or even equal to special steel in tensile strength.

7. Easy surface treatment Aluminium can be easily chemically and electrochemically surface treated or painted.

Above all, anodising treatment and dyeing can bring about excellent corrosion resistance and a wide range of colour variations. Thus Aluminium is widely used for interior and exterior products of buildings household utensils and electrical appliances.

8. Good electric conductor The electrical conductivity of Aluminium is approximately 60% that of copper. However, Aluminium weighs about one-third as much as copper

Aluminium is a very economical material as an electric conductor and is widely utilised in power-transmission cables, bases of electric bulbs, and in other electric fields.

9. Good heat conductor Aluminium is about three times as thermal-conductive as steel.

It is used for cooking utensils, air-conditioners, industrial heat exchangers, and automobile engine parts. It is also being used in energy saving equipment such as solar collectors.

10. Non magnetic Aluminium is not magnetic

It is used in marine magnetic-compasses, parabolic antennas, computer disks, etc.

11. High reflectivity Aluminium is highly reflective of light, heat, and electric waves. The purer the metal, the more so.

This feature is utilised for reflecting mirrors, reflectors (stoves, infrared dryers, lighting equipment), and wave guides. It is also used as an insulating material in buildings.

12. Recyclable Easy to recycle - Due to a low melting temperature, it is economically recyclable, requiring only about 1/28 the energy required for smelting. Sound-absorbing - Shock-absorbing -

It is an ideal material in this age of energy and resource saving. It can be used for ceilings. Because of low modulus of elasticity, it is used for automobile bumpers and the like.





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