The development history of aluminum alloy doors and windows

2025,07,29

Aluminum Alloy Windows are windows with frames and sash structures made of aluminum alloy building profiles. They are divided into ordinary aluminum alloy doors and windows and broken bridge aluminum alloy doors and windows. Aluminum alloy windows are beautiful, sealed, and high in strength. They are widely used in the field of construction engineering. In home decoration, aluminum alloy doors and windows are often used to encapsulate balconies.

The surface of aluminum alloy is oxidized and shiny. The window sash frame is large and can be inlaid with a large area of glass, allowing sufficient and bright indoor light, enhancing the virtual and real contrast between the indoor and outdoor facades, and making the room more layered. Aluminum alloy itself is easy to extrude, the cross-sectional dimensions of the profile are precise, and the processing accuracy is high. Therefore, many owners choose to use aluminum alloy doors and windows in decoration.

In the late 1980s, doors and windows were made of aluminum alloy profiles, which solved some of the shortcomings of steel windows. However, the profile itself is made of metal materials, and the heat and cold conduction is fast. The K value of the whole window of steel windows and aluminum alloy windows is above 6.0w/(m2.K), which does not fundamentally solve the problems of sealing and insulation. Although it can be equipped with hollow glass, the K value of the whole window can only reach about 4.5w/(m2.K).

In the mid-to-late 1990s, the broken bridge aluminum alloy insulation doors and windows appeared in the door and window market, which was a high-end door and window product in the door and window market at that time. High-strength insulation synthetic materials are used in the profile design, and high-tech such as powder spraying, fluorocarbon spraying and resin hot printing are used for surface treatment. It can meet the ever-changing color matching needs.

The outstanding advantages of the broken bridge aluminum alloy insulation doors and windows are light weight, high strength, good watertightness and airtightness, good fire resistance, large lighting area, atmospheric corrosion resistance, long service life, good decorative effect and good environmental performance.

Materials

There are 6 main aspects for reference:

Thickness

There are two types of aluminum alloy sliding doors: 70 series and 90 series. The aluminum alloy sliding doors inside the house can use the 70 series. The series number indicates the number of millimeters of the thickness of the door frame. There are four types of aluminum alloy sliding windows: 55 series, 60 series, 70 series, and 90 series. The series selection should be based on the size of the window hole and the local wind pressure value. The aluminum alloy sliding window used for enclosed balconies should not be less than the 70 series.

Strength

The tensile strength should reach 157 Newtons per square meter, and the yield strength should reach 108 Newtons per square millimeter. When purchasing, you can bend the profile moderately by hand, and it should be able to return to its original shape 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 for purchase.

Flatness

Check the surface of the aluminum alloy profile, there should be no dents or bulges.

Glossiness

Avoid purchasing aluminum alloy doors and windows with open bubbles (white spots) and ash (black spots), as well as profiles with obvious defects such as cracks, burrs, and peeling.

Oxidation degree

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 the surface can be wiped off.

Dongguan Wendou Doors and Windows Co., Ltd. is a factory specializing in the manufacture of aluminum alloy doors and windows, Aluminum Curtain Wall materials. We support the customization of various aluminum alloy door and window profiles. We have many years of production experience and a mature technical team. We are trustworthy. Please feel free to contact us for consultation.

Author:

Ms. Rebecca Lee

E-mail:

sale01@wddoorwins.com

Phone/WhatsApp:

+86 13502225784