怎样辨别铝合金门窗的优劣1.看用料。优质的铝合金门窗所用的铝型材,厚度、强度和氧化膜等,应符合国家的有关标准,壁厚应在1.2毫米以上,抗拉强度达到157牛/毫米~2,屈服强度要达到108牛/毫米~2,氧化膜厚度应达到10微米。达不到以上标准的,就是劣质 How to identify the pros and cons of aluminum alloy doors and windows 1. Look at the material. High quality aluminum alloy doors and windows used in aluminum, thickness, strength and oxide film, etc., should meet the relevant national standards, the wall thickness should be more than 1.2 mm, tensile strength of 157 N / mm ~ 2, yield strength to reach 108 cattle / mm ~ 2, oxide film thickness should reach 10 microns. Failure to meet the above criteria is poor quality