Quality standards for aluminum alloy doors and Windows

Take a look at the materials. High quality aluminum alloy doors and Windows used in aluminum profiles, thickness, strength and oxide film, should meet the relevant national standards, aluminum alloy window main stress rod wall thickness should be more than 1.4 mm, aluminum alloy door main stress rod wall thickness should be more than 2.0 mm, tensile strength reached 157 Newton per square meter of millimeter, yield strength to reach 108 Newton per square millimeter, Oxide film thickness should reach 10 microns. If the above standards are not met, it is inferior aluminum alloy doors and Windows, which cannot be used.
Two look at processing. High quality aluminum alloy doors and Windows, fine processing, installation, good sealing performance, switch freely. Poor quality aluminum alloy doors and Windows, blind selection of aluminum profiles series and specifications, rough processing, sawing cutting instead of milling processing, not according to the requirements of installation, poor sealing performance, switch is not free, not only air leakage and rain leakage and glass cracking phenomenon, but also encounter strong winds and external forces, easy to push and pull part or glass scraping or crashing, damage to people.
Look at the price three times. 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. Some aluminum alloy doors and Windows with wall thickness of only 0.6-0.8mm aluminum profiles have tensile strength and yield strength much lower than the relevant national standards, and the use is unsafe. In addition, there are more self-employed people who process aluminum alloy doors and Windows, and they do not know the structural characteristics and performance of aluminum alloy doors and Windows. In order to reduce the cost of jerry-cutting, shoddy, the hidden dangers of the product is larger, generally not suitable for use. It is best to choose regular aluminum alloy doors and Windows manufacturers. The national standard profile thickness is 1.4mm, if the supplier chooses 1.2mm or 1.0mm wall thickness or even thinner material, it is a substandard product, please pay attention to it when purchasing.
Four look material
There are mainly 6 aspects for reference in the material use:
Thickness: There are 70 series and 90 series of aluminum sliding doors and Windows, and 70 series can be used for aluminum sliding doors inside the residence. The number of aluminum alloy series indicates the number of millimeters of structural dimensions of the thickness of the door frame. There are four common aluminum alloy sliding Windows: 55 series, 60 series, 70 series and 90 series. The selection should be based on the size of the window hole and the local wind pressure value, and the aluminum alloy sliding window used to close the balcony should not be less than 70 series.
Strength: Tensile strength should reach 157 newtons per square millimeter, yield strength should reach 108 newtons per square millimeter. When purchasing, the profile can be moderately bent, and it should be able to return to its original state after letting go.
Chroma: the color of the same aluminum alloy profile should be consistent, if the color difference is obvious, it is not suitable to buy.
4 Flatness: Check the surface of aluminum alloy profiles, there should be no depression or bulge.
5. Gloss: Aluminum alloy doors and Windows to avoid the purchase of the surface with open bubbles (white spots) and ash (black spots), cracks, burrs, peeling and other obvious defects of the profile.
Oxidation degree: the thickness of oxide film should reach 10 microns. When purchasing, lightly scratch the surface of the profile to see whether the oxide film on the surface can be wiped off.