Aluminum alloy doors and Windows can quality from raw material (aluminum) and internal processing of materials, aluminum surface treatment quality and the price of aluminum alloy doors and Windows for general judgment.
1) the material, the high quality aluminum alloy doors and Windows used in aluminum, thickness, intensity and oxidation film, etc., should comply with the regulations of the relevant national standards, the wall thickness should be in 1.2 millimeter above, tensile strength of millimeter of every square metre 157 Newton, succumb intensity should achieve every square millimeter 108 Newton, oxidation film ply should achieve 10 micron. If standard of short of above, it is inferior aluminium alloy door window, cannot use.
2) the processing, the high quality aluminum alloy doors and Windows, fine processing, installation of exquisite, sealed performance is good, switch freely. Inferior aluminium alloy door, choose aluminous profile series and norms blindly, processed and manufactured in order to curium cut replaces mill processing, not according to the requirements for installation, sealed performance is poor, switch does not freely, not only rain of air leak leakage and occurrence glass blast crack phenomenon, and encounter blast and outside force, blow push-pull part or glass easily fall or touch fall, destroy content cuts.
3) look at the price, in general, high quality aluminum alloy doors and Windows for the production cost is high, price is inferior aluminium alloy door wants tall 30% the left and right sides. Some have a wall thick only of aluminium alloy door that 0.6 0.8 millimeter aluminous profile makes, tensile strength and yield strength under national relevant specification greatly, use very insecure.
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