Compared the characteristics of aluminum alloy windows and doors using the steel doors and Windows, aluminum doors and windows gets the following advantages:
1. Light weight, high strength. Density is only the l / 3 of steel.
2. Sealed performance is a great one. Airtight performance directly affects the application of doors and windows function and consumption. Airtight performance including air tightness, water tightness, thermal insulation and sound insulation sex four aspects.
3. Good durability, convenient on using and maintenance. Aluminum alloy windows and doors will not rust, do not fade, will not slump, minimal need of maintenance, spare parts service life is lengthy.
4. Elegant decorative effect. Surface of the aluminum alloy doors and windows have artificial oxide film and coloring form into composite tissue layer, this kind of composite membrane not simply corrosion resistance, wear-resistant, fire force to a certain degree, and lustrousness is exceedingly high. Aluminum alloy windows and doors as a result of transportable, processing and assembling precision, accurate, can make flexible, convenient and without noise.
Aluminium alloy material including doors and windows appear deformation, push-pull fixed phenomenon are routine occurance. When consumer choose and buying, should note the followings:
1. Thickness: Aluminium alloy sliding door has 70 series, 90 series two kinds, residential interior is able to use 70 series aluminium alloy sliding door. Series number express frame structure measurements the millimeter thickness. Aluminum alloy sliding window has 55 series, 60 series, 70 series and 90 series. Series to choose should based on humanly scaled size and local wind pressure value. Aluminum alloy sliding window utilized in a closed balcony mustn't be below 70 series.
2. Strength: Tensile strength should achieve 157 Newton every square millimeter, yield strength should achieve every square millimeter 108 Newton. When choose and buying, are able to use a hand moderately bending the profile, can time for original state after let go of.
3. Color: The identical aluminum profile root color should be consistent, should the color is actually different, namely, unfavorably choose and buy.
4. Flatness: Check the surface of extruded aluminium sections, should be no sunken or bloat.
5. Glossiness: Aluminium windows and doors should avoid to pick and buy that's open bubble(white point) and ash clinker(black point), and crack, burr, peeling, etc patent defect profiles.
6. The oxidation degree: The thickness of oxide film should approximately 10 microns. When the choose and purchase you are able to scratch only once lightly on the surface from the profile, determine if the oxide film at first glance can be erase.