What are the main properties of aluminum?
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①Aluminum is a silver-white light metal, the density is about 2. 72 g/cm3, about 1/3 of pure copper.
② Aluminum's heat capacity and the latent heat of peening is high, the melting point of pure aluminum is about 661 ℃. Boiling point of about 2450 ℃, its oxide Al2O3, melting point of about 2 050 ℃.
③ Aluminum is face-centered cubic structure.
④ industrial pure aluminum plastic plate high (Z = 80%), it is easy to withstand a variety of molding processes, but its strength is too low, so pure aluminum only through cold deformation to strengthen or alloying to improve its strength to be used as structural materials.
⑤ The coefficient of expansion of aluminum is 23.5x10*/9 (below 100 C), and its modulus of elasticity is 70 GPa.
⑥ Aluminum has an electrical conductivity of about 60% of that of copper, a resistivity of 50% of that of copper, and a thermal conductivity of 70% of that of copper. The electrical conductivity of common metals in descending order is: Ag, Cu, Au, Al. In summary, aluminum is less dense, more plastic, easier to work with, more resistant to corrosion, and more abundant, with a content of about 7. 73% (mass fraction) in the earth's crust.
