The Properties Of The Aluminum

Aluminum is a silver-white metal with a melting point of 660.1℃. The Earth's crust contains about 8% aluminum. In all elements, after oxygen and silicon, the third. Aluminum has a low density of 2.7 grams per centimeter, less than one-third that of copper. Its electrical and thermal conductivity are good, second only to silver, gold and copper, ranked fourth. The conductive capacity of aluminum is only about 65% of copper, to conduct the same amount of current, the conductive cross-sectional area of aluminum is about 1.6 times that of copper, but the weight of aluminum is only 30% of copper, according to the weight, the amount of aluminum or save about half. Chemical properties of aluminum and lively, easily with oxygen in the air, and the oxide film was prepared on the surface, make the aluminum and oxygen isolation, stop the aluminum oxide, and become a good resistance to atmospheric corrosion of materials, plasticity is good, easy to machining, can be rolled into sheet or foil, into a very fine silk and squeezed into various complex cross-section profiles; Good reflective performance, can reflect visible light, can also reflect ultraviolet light; The nuclear radiation resistance of aluminum is second only to zirconium and beryllium.

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