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| Properties of aluminum |
◎ Lightweight: The specific gravity of Al is 2.7 about one-third that of iron (7.9).
◎ Excellent corrosion resistance: When Al is exposed to air, a thin oxidized film forms on the surface protecting the metal from corrosion.
◎ Good electrical conductor: The electrical conductivity of Al is approximately 60% that of copper. However, Al weights about one-third as much as copper, which means it conducts about twice as much electricity as copper of the same weight.
◎ Good heat conductor: Al is about three times as thermal-conductive as steel.
◎ Easy to recycle: Due to a low melting temperature, it is economically recyclable.
◎ Easy surface treatment: Al can be easily chemically and electrochemically surface treated or painted.
◎ Strong at low temperatures: Although steel becomes brittle at low temperature, Al increase in tensile strength and retains excellent quality.
◎ Nonmagnetic: Al is nonmagnetic, so it cannot be affected by magnetic field. |
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