Aluminum alloy doors and Windows material selection

1. Thickness: aluminum alloy sliding door has 70 series, 90 series, residential interior aluminum alloy sliding door with 70 series can.The serial number indicates the number of millimeters of the frame thickness tectonic scale.Aluminium alloy push-pull window has 55 series, 60 series, 70 series, 90 series 4 kinds.Series selection should be based on the size of the window and local wind pressure value.The aluminium alloy push-pull window that USES as closing balcony should not be less than 70 series.

2. Strength: tensile strength shall reach 157 newtons per square millimeter, while yield strength shall reach 108 newtons per square millimeter.When choose and buy, usable hand is measurable and tortuous profile, after letting go, should be able to restore original state.

3. Chroma: the same aluminum alloy profile color should be common, such as significant color difference, that is not suitable for purchase.

4 flatness: view the appearance of aluminum alloy profile, there should be no depression or bulging.

5 glossiness: aluminum alloy doors and Windows to prevent the purchase of appearance open bubbles (white spots) and ash (black spots), as well as cracks, burrs, peeling and other significant shortcomings of the profile.

6. Oxidation degree: the oxide film thickness should reach 10 microns.When the purchase can be in profile appearance light qi cut, look at the appearance of the oxide film is not able to erase.