any practical applications for using aluminum alloys instead of pure metals?

Are there any practical applications for using aluminum alloys instead of pure metals? Yes, there are many situations where aluminum alloys are preferred rather than pure aluminum. And the reason for this is aluminum alloys can perform better in some functions and can be applied in some equipment that require high strength and corrosion resistance ability. So to answer to this question we should firstly learn about the properties of pure aluminum and aluminum alloys.

Pure aluminium is relatively soft and has a fairly low tensile strength of about 50 MPa (500 kg/cm2, or 7000 psi) under annealed conditions. (Annealing involves heating followed by slow cooling to reduce the brittleness of the metal.) However, with alloying and appropriate heat and mechanical treatments it can be made harder and stronger, with tensile strengths of up to 700 MPa.

So if people want to use aluminum materials in practical manufacture, like in the plane, ships and automobiles, the soft pure aluminum is not adequate in the strength and corrosion resistance, and in this circumstance, aluminum alloys like 2 or 7 series, 5/6 series aluminum could work better. If you want to know more about which specific aluminum alloys should be applied in different circustances, please leave us a message.