Aluminum alloy doors and windows refer to doors and windows made of aluminum alloy extruded profiles for frames, stiles, and fans, which are called aluminum alloy doors and windows. They are a relatively good material for doors and windows and are very popular among people. So what are the quality standards for aluminum alloy doors and windows?
The thickness, strength, and oxide film of aluminum profiles used for high-quality aluminum alloy doors and windows should comply with relevant national standards. The wall thickness of the main load-bearing rod of aluminum alloy windows should be above 1.4 millimeters, and the wall thickness of the main load-bearing rod of aluminum alloy doors should be above 2.0 millimeters. The tensile strength should reach 157 Newton per square meter millimeter, the yield strength should reach 108 Newton per square millimeter, and the oxide film thickness should reach 10 micrometers. If the above standards are not met, it is considered inferior aluminum alloy doors and windows and cannot be used.
High quality aluminum alloy doors and windows, finely processed, meticulously installed, with good sealing performance and easy opening and closing. Poor quality aluminum alloy doors and windows, blindly selecting aluminum profile series and specifications, rough processing, using saw cutting instead of milling, not installing according to requirements, poor sealing performance, and difficult opening and closing. Not only are there air and rain leaks and glass bursts, but also when encountering strong winds and external forces, it is easy to scrape or touch the sliding parts or glass, causing damage and injury to people.
In general, high-quality aluminum alloy doors and windows are priced around 30% higher than low-quality aluminum alloy doors and windows due to their high production costs. Some aluminum alloy doors and windows made of aluminum profiles with a wall thickness of only 0.6-0.8 millimeters have tensile strength and yield strength significantly lower than the relevant national standards, making their use very unsafe. In addition, there are currently many individual businesses processing aluminum alloy doors and windows, and they do not understand the structural characteristics and performance of aluminum alloy doors and windows. In order to reduce costs by cutting corners and using inferior products as substitutes, it is generally not suitable to use products with significant hidden dangers. Select products from legitimate aluminum alloy door and window manufacturers. One special point to note here is that the current national standard profile thickness is 1.4mm. If the supplier chooses materials with a wall thickness of 1.2mm or 1.0mm or even thinner, they are considered substandard products. Please pay attention when purchasing.
There are six main aspects to refer to in terms of material usage:
1. Thickness: There are 70 series and 90 series aluminum alloy Sliding door, and 70 series aluminum alloy Sliding door inside the residence can be used. The series number represents the thickness and structural dimensions of the door frame in millimeters. There are four types of aluminum alloy sliding windows: 55 series, 60 series, 70 series, and 90 series. The selection of the series should be determined based on the size of the window opening and the local wind pressure value. Aluminum alloy sliding windows used for enclosed balconies should not be less than 70 series.
2. Strength: The tensile strength should reach 157 Newton per square meter millimeter, and the yield strength should reach 108 Newton per square millimeter. When purchasing, the profile can be moderately bent by hand, and it should be able to return to its original state when released.
3. Glossiness: Aluminum alloy doors and windows should avoid selecting profiles with obvious defects such as open bubbles (white spots) and ash (black spots) on the surface, as well as cracks, burrs, and peeling.
4. Degree of oxidation: The thickness of the oxide film should reach 10 microns. When purchasing, you can lightly scratch the surface of the profile to see if the oxide film on its surface can be wiped off.
5. Chromaticity: The color of the same aluminum alloy profile should be consistent, if the color difference is obvious,