Cold rolled CC (continuous casting) aluminum coil is produced by continuously casting liquid aluminum directly into thin slabs, which are then cold rolled. This process combines casting and rolling, simplifying the production process and offering advantages such as high efficiency, energy conservation, and low cost. Cold rolled aluminum coil is widely used in the automotive, construction and electronics industries. Cold rolled CC aluminum coil is produced from cast billets through multiple cold rolling mill passes to the target thickness (typically 0.2-5.0mm). Annealing eliminates work hardening, resulting in excellent ductility and formability. Common aluminum alloy grades include 1060 (pure aluminum) and 3003 (aluminum-manganese alloy), and tempers include O (annealed), H12 (quarter hard), and H14 (half hard).
Product Characteristics of Cold Rolled Aluminum Coil
- Thickness Range
The initial strip thickness is typically 6-10 mm, and after cold rolling, coils with thicknesses of 0.15-15 mm can be produced, with a common thickness of 0.2-1 mm.
- Width and Coil Weight
Aluminum coil widths can be slit to meet specific requirements, with common widths ranging from 1000-2000 mm. A single coil weighs approximately 2-3 tons, making it easy to load, unload, and transport.
- Surface Quality
The cold rolling process produces a smooth surface and uniform thickness, making it suitable for applications requiring a high appearance.
- High Dimensional Accuracy
The cold rolling process enables high thickness control, resulting in high dimensional accuracy.
- Corrosion Resistance:
Aluminum coils have excellent corrosion resistance, which can be further enhanced through surface treatments such as anodizing.
- Excellent Mechanical Properties:
Cold rolling imparts relatively high strength and hardness to the aluminum coils.
- Ease of Processing:
Cold rolled aluminum coils can be further processed, such as stamping and bending, making them suitable for a variety of industrial applications.
Typical Applications of CC Aluminum Coil:
- Architecture and Decoration:
Used in curtain walls, roofs, doors, windows, ceilings, and other applications, it is a preferred material for green buildings due to its light weight (density approximately 2.7g/cm³), corrosion resistance (natural oxide film forms on the surface), ease of processing (bending and stamping), and aesthetic appeal.
- Transportation
Automotive Industry: Vehicle body components, engine hoods, battery trays, and other applications can reduce vehicle weight by 10%-20% and increase range. Global demand for aluminum alloys from new energy vehicles is expected to grow by 15% by 2025, driving market expansion for cold-rolled aluminum coils.
Rail Transit: High-speed rail carriages and subway interiors require high-strength and fire-resistant materials, with 3003 aluminum alloy being a common choice.
- Packaging and Electronics
Food Packaging: Cans and foils, among others, are where 1060 pure aluminum is the mainstream material due to its non-toxicity, odorlessness, and high barrier properties.
Electronic and Electrical Appliances: Appliance housings (such as refrigerators and air conditioners), radiators, and lithium battery casings utilize aluminum's advantages in conductivity and heat dissipation.
- Industrial Manufacturing
Machinery Parts, Cable Strips, and Chemical Equipment Linings require a balance between corrosion resistance and strength.
Continuously cast cold rolled aluminum coils occupy an important position in the fields of construction, automobiles, packaging, electronics, etc. due to their low cost, high surface quality, high precision, lightweight, corrosion resistance, energy saving and environmental protection.
