Aluminum is a silver-colored, low density (2.7 g/cc) metal that finds use in a huge variety of commercial applications. Unalloyed aluminum is ductile, exhibits moderate strength, and is very resistant to corrosion under most circumstances. Aluminum can be dramatically strengthened by the addition of proper alloying elements (Cu, Mg, Mn, Si, etc.) and later heat/work treatments. Aluminum is normally used in both wrought and cast forms.
The low density of aluminum results in its extensive use in the aerospace industry, and in other transportation fields. Its resistance to corrosion leads to its use in food and chemical handling (cookware, pressure vessels, etc.) and to architectural uses.
Channel Aluminum are of different grades. Some of them are :-
General 6061 characteristics and uses:
Superior joining characteristics, good acceptance of applied coatings. Integrates relatively high strength, good workability, and high resistance to corrosion; widely available.
Aircraft fittings, camera lens mounts, couplings, marines fittings and hardware, electrical fittings and connectors, decorative or misc. hardware, hinge pins, magneto parts, brake pistons, hydraulic pistons, appliance fittings, valves and valve parts.
Some of the applications include pipe, railings, furniture, architectural extrusions, irrigation pipes, and transportation.