Extruded Aluminum Profiles

Extruded Aluminum Profiles are aluminum products created through specialized processes like extrusion and stretching, which shape the profiles into various cross-sectional forms. Known for their excellent physical and chemical properties, these profiles are essential materials in industries such as construction, automotive, and manufacturing. They provide durability, strength, and versatility for a wide range of applications.

Excellent Corrosion Resistance
Extruded aluminum profiles have strong oxidation resistance. When exposed to air, a dense oxide film naturally forms on the surface, protecting the aluminum alloy from moisture, salt spray, acid, and alkali.

High Thermal Conductivity
Aluminum has a thermal conductivity of 150–200 W/m·K, much higher than steel (about 50 W/m·K). This allows aluminum profiles to conduct and dissipate heat efficiently, making them ideal for electronic products, radiators, and automotive parts where fast and stable heat transfer is required.

Excellent Electrical Conductivity
With an electrical conductivity of 35.5×10⁶ S/m, aluminum conducts electricity effectively-second only to copper. However, aluminum's density is only one-third that of copper, providing an excellent strength-to-weight ratio. Through precise extrusion and heat treatment, our aluminum profiles achieve stable and reliable electrical performance.

Raw Material Selection
Aluminum profiles are made from either pure aluminum (1050, 1100 series) or alloy aluminum (6061, 6063 series). Alloy aluminum is preferred for its higher strength, corrosion resistance, and weldability. Selecting the right alloy composition ensures the desired mechanical performance and surface treatment quality.

Melting and Casting
Aluminum alloys are first melted at 450–500°C in a furnace and then cast into uniform aluminum ingots. The casting process ensures consistent alloy composition and minimal gas content, which is essential for producing high-quality profiles.

Extrusion
Heated aluminum ingots are placed into an extruder and pressed through a precision-designed die at 400–500°C. This process shapes the aluminum into the required cross-section with high dimensional accuracy. Adjusting extrusion pressure and temperature helps refine the grain structure, ensuring the profiles have high strength, good toughness, and excellent surface finish.

Cooling and Cutting
After extrusion, the profiles are rapidly cooled by air or water to stabilize their shape and properties. During this stage, a thin oxide film naturally forms, enhancing corrosion resistance. The cooled profiles are then cut to standard lengths with millimeter-level precision, ensuring high accuracy for later assembly and processing.

Surface Treatment
To further improve appearance and protection, aluminum profiles undergo surface treatments such as anodizing, electrophoretic coating, or powder coating. Anodizing forms a dense oxide layer that increases corrosion and wear resistance while giving the surface a smooth, decorative finish.

Heat Treatment
For applications requiring greater strength, heat treatment is performed using T5 (natural aging) or T6 (artificial aging) processes. Controlled heating and cooling enhance the aluminum's crystal structure, increasing strength by 20%–40% and meeting demanding engineering and structural requirements.

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