How to judge whether aluminum alloy doors and windows are good or bad?

- Dec 08, 2020-

Aluminum alloy doors and windows refer to doors and windows made of aluminum alloy extruded profiles as frames, panels and fans. They are called aluminum alloy doors and windows, or aluminum doors and windows for short. Aluminum alloy doors and windows include aluminum alloy as the base material for carrying and transferring weight and load, wood-plastic composite doors and windows, referred to as aluminum-wood-plastic composite doors and windows, and aluminum-plastic composite doors and windows.

The quality of aluminum alloy doors and windows can be roughly judged from the selection of raw materials (aluminum profiles), the surface treatment and internal processing quality of aluminum materials, and the price of aluminum alloy doors and windows.

1. Toughness. The aluminum profile, thickness, strength and oxide film used for high-quality aluminum alloy doors and windows should meet the relevant national standards. The wall thickness of the main stressed member of the aluminum alloy window should be greater than 1.4 mm, the wall thickness of the main stressed member of the aluminum alloy door should be greater than 2.0 mm, the tensile strength should reach 157 Newtons per square meter, and it should have a yield strength. In order to achieve 108 Newtons per square millimeter, the oxide film thickness should reach 10 microns. If it does not meet the above standards, it is inferior to aluminum alloy doors and windows that cannot be used.


2. Process. High-quality aluminum alloy doors and windows, fine processing, beautiful installation, good sealing performance, no switch. For poor-quality aluminum alloy doors and windows, blindly choose aluminum profile series and specifications, roughing, sawing instead of milling, not meeting installation requirements, poor sealing performance, imperfect switches, not only leaking wind and rain, but also glass cracks. At the same time, it will encounter strong wind and external force, which can easily push and pull components or glass to blow down or collide and damage.


3. Price. Generally speaking, the production cost of high-quality aluminum alloy doors and windows is about 30% higher than that of low-quality aluminum alloy doors and windows. Some aluminum alloy doors and windows have a wall thickness of only 0.6-0.8 mm and are made of aluminum profiles. Its tensile strength and yield strength are far lower than the relevant national standards, and it is not safe to use. Besides, many individual households process aluminum alloy doors and windows. They do not understand the structural characteristics and performance of aluminum alloy doors and windows. To reduce the cost of cutting corners and materials, and to reduce material consumption, it is generally not appropriate to use sub-optimal products, which poses greater hidden dangers. It is best to choose products from regular aluminum alloy doors and windows manufacturers. There is a special point here: the national standard profile thickness is 1.4 mm. If the supplier chooses 1.2 mm or 1.0 mm wall thickness or even thinner materials, they are all products that do not meet the standard. Please pay attention when choosing and purchasing.


4. Material

Thickness: There are 70 series and 90 series aluminum alloy sliding doors and windows. Aluminum sliding doors can be used in the 70 series in residential buildings. The number of aluminum alloy series indicates the number of millimeters of the thickness of the door frame. Ordinary aluminum alloy sliding windows have 55 series, 60 series, 70 series and 90 series. The selection should be based on the window size and local wind pressure. Aluminum sliding windows for closed balconies are no less than 70 series.

Strength: The tensile strength should be 157 Newtons/mm2, and the yield strength should be 108 Newtons/mm2. In the selection and purchase, after letting go, you can moderately bend and restore the contour.