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How to look at the material when choosing aluminum alloy doors and windows
Editor: liefan 17:00:00, December 26, 2019

Customer: how to choose and buy aluminum alloy doors and windows? What are the materials

Shanghai liefan Material Co., Ltd.: now the door and window market is mixed with fish and snakes. If you choose wrong, it is definitely a potential safety hazard! When shopping, you must recognize the brand liefan!

The following safan aluminum alloy doors and windows

For your reference:

1. Thickness: there are 70 series and 90 series aluminum alloy sliding doors, and 70 series can be used for aluminum alloy sliding doors inside residential buildings. The series number represents the number of mm in which the door frame thickness is constructed. There are four kinds of aluminum alloy sliding windows: 55 series, 60 series, 70 series and 90 series. Series selection should be based on the size of window opening and local wind pressure value. Aluminum alloy push-pull windows used as closed balcony should not be less than 70 series.
2. Strength: tensile strength should reach 157 n / m2 and yield strength should reach 108 n / m2. When choosing aluminum alloy doors and windows, you can use your hand to bend the profile moderately, and you should be able to restore the original state after releasing it.
3. Color difference of the same aluminum alloy should be avoided.
4. Flatness: check the surface of aluminum alloy profile, there should be no depression or bulge.
5. Gloss: aluminum alloy doors and windows to avoid the surface of open bubbles (white spots) and ash (black spots), as well as cracks, burrs, peeling and other obvious defects of the profile.
6. Oxidation degree: the thickness of oxide film should reach 10 μ M. Choose aluminum alloy doors and windows can be in the profile surface of a light scratch, to see whether the surface of the oxide film can be wiped off.

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