A look at the price Under normal circumstances, high-quality aluminum alloy doors and windows due to high production costs, the price is about 30% higher than inferior aluminum alloy doors and windows. Second look processing High-quality aluminum alloy doors and windows, fine processing, installation stress, good sealing performance, switch freely. Three to see the materials The aluminum profiles used in high-quality aluminum alloy doors and windows, thickness, strength, and oxide film shall comply with relevant national standards. Fourth, look at the material in the material of the material There are six main aspects can refer to: 1. Chroma: The color of the same aluminum alloy should be consistent, such as obvious color difference, that is not suitable for purchase. 2. 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. 3. Strength: The tensile strength should reach 157 Newtons per square meter and the yield strength should reach 108 Newtons 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. 4. 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. 5. 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. 6. Flatness: Check the surface of the aluminum alloy profile, there should be no depression or bulging. Note: The good quality of aluminum alloy doors and windows is only the first step, and daily maintenance must be done well. To ensure the use period. Famous aluminum brand (in no particular order) 1 Chinalco Aluminium (China Aluminum Corporation, China's top 10 aluminum companies, and a state-owned super-large state-owned enterprise) 2 Asia-South Asia (China Well-known Trademarks, China Top Brands, Top Ten Chinese Aluminum Profile Companies, Guangdong Asia Aluminum Factory Co., Ltd. 3 Jianmei Aluminum (China Well-known Trademark, China Top Brand, Top Ten Chinese Aluminum Profile Enterprise, Guangdong Jianmei Aluminum Profile Factory Co., Ltd.) 4 Feng Aluminum Aluminum (China Famous Brand, Guangdong Famous Brand, Guangdong Famous Brand Product, Guangdong Feng Aluminum Aluminum Co., Ltd.) 5 Zhongwang Aluminum (China Top Brand, China Well-known Trademark, Liaoning Famous Brand, China Zhongwang Holdings Co., Ltd.) 6 Xingfa Aluminum (China Top Brand, China Well-known Trademark, Top 10 Chinese Aluminum Profiles, Xingfa Aluminum Holdings Co., Ltd.) 7 Dongliang Aluminum (listed company, China Famous Brand, China Well-known Trademark, Top Ten Chinese Aluminum Profile Enterprise, Zhejiang Dongliang New Material Co., Ltd.) 8 Nanshan Aluminium (China Top Brand, China Well-known Trademark, Top 10 Chinese Aluminum Profile Companies, Shandong Nanshan Aluminum Industry Co., Ltd.) 9 Jingge Aluminum Profiles (China Well-known Trademarks, Top Ten Chinese Aluminum Profile Companies, Jingge Aluminum Technology Co., Ltd.) 10 Weiye Aluminum (China Famous Brand, Guangdong Famous Brand, Guangdong Famous Brand Product, Guangdong Weiye Aluminum Factory Co., Ltd.) Decoration materials knowledge decoration company aluminum alloy window door price switch residential Pneumatic Telescopic Mast with power of air
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