Why choose Chalco 7021 T6 auto aluminum profile?
Authentication
Chalco products are manufactured in our advanced factories using strict quality and environmental management systems, and have passed ISO 9001 and ISO 14001 certifications, as well as IATF16949 certifications.
Production strength
Production equipment, production standards and capabilities, production lines for automotive panels: cleaning, passivation, stretching.
Reference
Chalco Aluminum serves Tesla, Ford, Shanghai Automobile, Nextev, Beiqi New Energy, Changan Automobile and other famous new energy automobile manufacturers, determines the material certification relationship, and has completed the certification of some models of automobile plate materials of Beiqi New energy, Nextev and other automobile factories.
7021 aluminum auto profiles specification
| Alloy | 7021 |
| Temper | T6 |
| Production standards | GB/T 33910, ASTM B221, EN755 |
| Thickness | Generally speaking, the thickness of 7021 aluminum alloy automobile profiles is between 0.5mm and 20mm. |
| Width | Generally between 20mm and 300mm. |
| Length | Depending on vehicle and application Width varies according to application |
| Surface treatment of aluminum profiles | Surface treatment of aluminum profiles Anodizing, electrophoretic coating, sandblasting and other methods |
| Common shapes |
Angle profile: it is often used for the connection of structural parts such as doors, roofs, and bottoms. Square tube: often used for support and connection of structural parts such as chassis and body. Rectangular tube: often used for support and connection of structural parts such as car body. Round tube: often used for support and connection of structural parts such as car body. |
It should be noted that different car manufacturers and different models may have different aluminum profile specifications and application requirements. Therefore, the specific specifications and applications need to be confirmed according to the actual situation.
7021 alloy chemical composition limits
| Element | Fe | Si | Mn | Cr | Ti | Cu | Zr | Mg | Zn |
Other (each) |
Other (total) |
Al |
| Composition(%) | max 0.4 | max 0.25 | max 0.1 | max 0.05 | max 0.1 | max 0.25 | 0.08-0.18 | 1.2-1.8 | 5-6 | 0-0.05 | 0-0.15 | Remainder |
7021 aluminum profiles for auto mechanical properties
| Material | Temper | Thickness mm | Tensile strength（MPa） | Yield strength（MPa） | Elongation in 2" (%)（A50mm%） | HBW |
| 7021 | T6 | ≤20.00 | ≥410 | ≥485 | ≥8 | 120 |
The main use of 7021 automotive aluminum profiles in the automotive field
Body structure: since 7021 aluminum profiles have high strength and low density, they can be used in the manufacture of automobile body structures, including body frames, side beams, front and rear axles, etc. This reduces overall vehicle weight and improves the vehicle's fuel economy and acceleration performance.
Doors and hoods: 7021 aluminum profiles can also be used to make parts such as doors and hoods. Compared with traditional steel doors and hoods, parts made of 7021 aluminum profiles are lighter in weight, which can reduce the overall weight of the vehicle and improve the economy and safety performance of the car.
Wheels: 7021 aluminum profiles can also be used to manufacture car wheels, which can improve the stability and handling performance of the vehicle.
Braking system: 7021 aluminum profiles can be used to manufacture some parts in the braking system, such as brake calipers, which can improve the performance and durability of the braking system.
In short, 7021 aluminum profiles are widely used in the automotive field and can be used in many aspects of the car, which can not only improve the performance and economy of the car, but also improve the safety of the vehicle.
Characteristics of 7021 automotive aluminum profiles
High strength: 7021 aluminum alloy has high strength, which can meet the strength requirements of automobile structural parts and parts.
Good processing performance: 7021 aluminum profile is easy to process and shape, and is suitable for various processing techniques, such as extrusion, stretching, die forging, etc.
Good corrosion resistance: 7021 aluminum alloy has good corrosion resistance in a certain environment, which can meet the requirements of automobiles in different regions and environments.
Good weldability: 7021 aluminum alloy has good weldability and is suitable for a variety of welding processes, such as TIG, MIG, etc.
Lower density: The density of 7021 aluminum profile is lower than that of steel, which can effectively reduce the weight of the car and improve fuel economy.
Good surface quality: The surface of 7021 aluminum profile is smooth and flat, not prone to defects, and can meet the appearance requirements of automobiles.
Based on the above characteristics, 7021 aluminum profile is an ideal automotive structural material, which can meet the requirements of the automotive industry for high strength, light weight, and corrosion resistance.
Precautions for the use of 7021 automotive aluminum profiles
Do not hit with hard objects: although 7021 aluminum alloy has high strength, its hardness is relatively low, and it is easy to be impacted and scratched. Therefore, during use and transportation, care should be taken to avoid collision with hard objects.
Anti-corrosion: 7021 aluminum alloy has good corrosion resistance, but it is prone to oxidation and corrosion in a humid environment. Therefore, care should be taken to avoid contact with water or moisture during storage and use.
Pay attention to safety when welding: 7021 aluminum alloy can be connected by various welding methods, but safety should be paid attention to during welding to avoid accidents such as harmful gases and fires.
Protect the surface: the surface of 7021 aluminum alloy is smooth and flat, and is not prone to defects, but it is prone to scratches and stains during use, so care should be taken to protect its surface during use and storage.
Avoid overheating: 7021 aluminum alloy has good processing performance, but care should be taken to avoid overheating during processing, so as not to affect its performance and strength.
To sum up, the use of 7021 automotive aluminum profiles needs to pay attention to its material characteristics and use environment, so as not to affect its performance and service life.
