铝合金门窗优劣辨（Distinguishing merits of aluminium alloy doors and windows）.doc

铝合金门窗优劣辨（Distinguishing merits of aluminium alloy doors and windows） Distinguishing merits of aluminium alloy doors and windows Look at the materials. Aluminum Alloy used aluminum doors and windows of high quality, thickness, strength and oxide film, should comply with the relevant standards of the state regulations, wall thickness should be more than 1.2 mm, the tensile strength of 157 mm per square metre of Newton, yield strength to reach 108 per square millimeter of Newton, film thickness should reach 10 micron. If not up to the above standards, that is inferior aluminum alloy doors and windows, can not be used. Two look at the processing. High quality aluminum alloy doors and windows, exquisite processing, installation stresses, good sealing performance, switching freely. Aluminum Alloy doors and windows of inferior, choose aluminous profile series and specifications, processing by saw cutting instead of crudely made, milling, no installation required, poor sealing performance, the switch does not freely, not only air leaks and glass burst phenomenon, and encountered strong winds and force, easy to push and pull part or glass fall or drop destroy, wounding. Three look at the price. In general, the quality of aluminum alloy doors and windows because of high production costs, the price of inferior aluminum alloy doors and windows to be about 30% higher. Some aluminum alloy doors and windows made of only 0.6-0.8 mm aluminum wall thickness, tensile strength and yield strength are much lower than the relevant national standards, the use is very unsafe. In addition, the current processing of aluminum alloy doors and windows more self-employed, they do not understand the structural features of aluminum alloy doors and windows and their performance. In order to reduce the cost of shoddy work, shoddy, the hidden trouble of the product is large, the general should not be used. The best choice of regular aluminum alloy doors and windows manufacturer products. Decoration se