Aluminum alloy door and window material purchase notes A look at aluminum alloy door and window material material. There are six main aspects in the materials used for reference: 1. Thickness: There are 70 series and 90 series aluminum alloy sliding doors. The aluminum alloy sliding door inside the house can use 70 series. The series number indicates the thickness of the door frame thickness in millimeters. Aluminum alloy sliding window has 55 series, 60 series, 70 series, 90 series four. The series selection should be based on the size of the window hole and the local wind pressure value. Aluminum sliding windows used as closed balconies should not be smaller than the 70 series. 2, strength: tensile strength should reach 157 Newton per square meter, yield strength to reach 108 Newton per square millimeter. When you buy, you can use your hands to bend the profile moderately, and you should be able to recover after loosening your hands. 3, color: the same aluminum alloy profile color should be consistent, such as the color difference is obvious, that is not suitable for purchase. 4, flatness: check the surface of aluminum alloy profiles, there should be no depression or bulging. 5, gloss: aluminum alloy doors and windows to avoid the purchase of surface bubbles (white spots) and ash (black spots), as well as cracks, burrs, peeling and other obvious defects in the profile. 6, oxidation degree: The oxide film thickness should reach 10 microns. When you purchase, you can lightly stroke the surface of the profile to see if the oxide film on the surface can be wiped off. Company Name: Ninghai Longxiang Aluminum Co., Ltd. Aluminum alloy door and window material company Address: No.2, Zhongshan East Road, Shuangshan Village, Ningbo, Ningbo, Zhejiang, China (315600) Tel: 0574-65177738- Contact person: Mr. Yuan Enterprise Website: http://longxiang.alu.cn
