The thickness, strength and oxide film of high-quality aluminum alloy doors and windows should comply with relevant national standards. The wall thickness should be more than 1.2 mm, the tensile strength should be 157 n / m2, the yield strength should be 108 n / m2, and the oxide film thickness should be 10 μ M. The above, if not up to the standard aluminum doors and windows.
Second look at the processing, high quality aluminum alloy doors and windows, fine processing, exquisite installation, good sealing performance, switch freely. Poor quality aluminum alloy doors and windows, blind selection of aluminum profile series and specifications, rough processing, saw cutting instead of milling processing, not according to the requirements of installation, poor sealing performance, switch is not free, not only air and rain leakage and glass burst phenomenon, but also encounter strong wind and external force, it is easy to pull parts or glass scraping or falling, damage and injury.
Aluminum alloy doors and windows
Third look at the price, in general, high-quality aluminum alloy doors and windows due to high production costs, the price is about 30% higher than that of poor quality aluminum alloy doors and windows. Some aluminum alloy doors and windows with wall thickness of only 0.6-0.8 mm aluminum profiles have tensile strength and yield strength much lower than the relevant national standards, so they are not safe to use.
In addition, at present, there are many self-employed workers who do not know the structural characteristics and performance of aluminum alloy doors and windows. In order to reduce the cost, shoddy, shoddy, product hidden danger is bigger, generally not suitable for use. It is better to choose the products of regular aluminum alloy doors and windows manufacturers. Here is a special note: the current national standard profile thickness is 1.4mm. If the supplier chooses the material with wall thickness of 1.2mm or 1.0mm or even thinner, it belongs to substandard products. Please pay attention when purchasing.
Please indicate the source of the article: Shanghai liefan aluminum alloy door and window factory//