Aluminum is light with a density one third that of steel, 2.700 kg/m3
Aluminum alloys commonly have tensile strengths of between 10,000 and 102,000 psi. Its density is about 1/3 of steel, which provides an excellent strength-to-weight ratio.
Aluminum is easily worked using most machining methods milling, drilling, cutting, punching, bending, etc.
Aluminums superior malleability is essential for extrusion. With the metal either hot or cold, this property is also exploited in the rolling of strips and foils, as well as in bending and other forming operations.
Aluminum is an excellent conductor of heat and electricity. An aluminum conductor weighs approximately half as much as a copper conductor having the same conductivity.
Features facilitating easy jointing are often incorporated into profile design. Fusion welding, Friction Stir Welding, bonding and taping are also used for joining.
Aluminium is a good reflector of both visible light and radiated heat.
Aluminum reacts with the oxygen in the air to form an extremely thin layer of oxide. This layer can be futher increased by anodizing.
To avoid interference of magnetic fields aluminium is often used in magnet X-ray devices.
After oxygen and silicon, aluminum is the most common element in the Earths crust.