ã€China Aluminum Network】 In our daily birthday, aluminum alloy doors and windows are often deformed or pushed and pulled. With regard to the material knowledge of aluminum alloy doors and windows, we can start from the following aspects.
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 shall be 157 Newtons per square meter and the yield strength shall be 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.
3. Color: The same aluminum alloy color should be the same, such as the color difference is obvious, that is not suitable for purchase.
4. Flatness: Check the surface of the aluminum alloy profile, 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), and cracks, burrs, peeling and other obvious defects in the profile.
6. Degree of oxidation: The thickness of the oxide film 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.
Garden Tool,Garden Hoe,Garden Fork,Garden Equipment
Ebic Tools Limited , http://www.ebictools.com