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Taiji industrial City, High-tech Development Zone, Qingyuan City, Guangdong Province, P.R. China.
Aluminum sliding door has 70 series and 90 series, and the 70 series of aluminum is suitable for sliding door inside residential. The number of series represents the number of millimeters of the thickness for the door frame. Aluminum alloy sliding window has 55 series, 60 series, 70 series and 90 series. You can choose the series of window based on the hole size of window and local wind pressure value. Aluminum alloy sliding window for enclosed balconies shall be no less than 70 series.
strength:Tensile strength should be up to 157 newton per square meter and the yield strength should be 108 Newton per square millimeter. When you purchase it, you can bend the profile appropriately by hand, then it can recover after you leave it.
Color:The color of the whole aluminum alloy profile should be consistent. It is not suggested to buy if the color difference is obvious.
Flatness:Check the surface of aluminum alloy profiles, and it should be no depression or bulge.
Gloss:When buying aluminum doors and windows, you should be noted to avoid the aluminum profile with air bubbles (white spots) and ash (black spots) on its surface. Of course, the profile with obvious defects like cracks, burrs, peeling and others should not be bought either.
Degree of oxidation:The thickness of the oxide film should be 10 microns. You can slash lightly on the surface to see whether the oxide of the surface can be erased.
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