How to identify quality aluminum alloy window and door
First look at material. High quality aluminum window and door used aluminum, thickness, strength and oxidation film, should conform to the national relevant specification, wall thickness should be in 1.2 millimeter above, tensile strength achieves millimeter of every square 157 Newton, yield strength to achieve every square millimeter 108 Newton, oxidation film thickness should achieve 10 microns. If the standard of short of above, it is inferior aluminium alloy door window, cannot use.
Second look at processing. High quality aluminum alloy doors and Windows, fine processing, installation is exquisite, sealed performance is good, switch freely. Inferior aluminium alloy door, choose aluminous profile series and norms blindly, processing in a rough way, in order to curium cut instead of milling process, not by the requirements for installation, sealed performance is poor, switch not freely, not only rain of air leak leakage and occurrence glass cracking phenomenon, and meet winds and forces, easy to blow push-pull part or glass fall or touch fall, destroy content to hurt.
Three see the price. Be in usually, high quality aluminum alloy doors and Windows for high production costs, price inferior aluminium alloy window about 30% higher. Some have a wall thick only 0.6-0.8 mm aluminum production of aluminum alloy doors and Windows, tensile strength and the yield strength under national relevant specification greatly, use very insecure. In addition, at present processing aluminum alloy doors and Windows of the soho is more, they do not know the aluminum alloy doors and Windows of the structure and performance. In order to reduce cost jerry, shoddy, the hidden trouble of the product is bigger, should not be commonly use. Had better choose normal aluminum alloy doors and Windows of the manufacturer of the product.
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