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Selection skills of aluminum alloy doors and windows
The appearance must go through customs.
The surface of a good aluminum alloy material should be smooth and seamless, with the same color, without chromatic aberration, aluminium scrap and burr.
Thickness is critical.
Different series of aluminum alloy windows have different thicknesses, such as 55, 60, 70 and 90 series. The thicker the window frame, the stronger the wind resistance. The thickness of aluminum alloy window of closed balcony should not be less than 70 series.
The strength should be excellent.
The tensile strength of qualified aluminum alloy materials should reach per square millimeter 157 Newton. When buying, gently bend the profile and recover quickly, which is a good material.
Check the degree of oxidation
A good aluminum alloy material should have a 10 micron oxide film on its surface. If the oxide film is too thin, it will affect the service life. Gently scrape the surface of the profile to see if the oxide film is easy to wipe off.
shopping tips
Buying aluminum alloy windows requires not only planning, but also mastering the selection skills! Understand the material characteristics, and then make a choice, so that you can easily choose a satisfactory product!
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