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China Aluminum Coil Suppliers - High-Quality Factory Products for Various Industries
Classification by Alloy Series
Aluminum Coils are categorized into different types based on the alloy composition, each with distinct properties tailored to specific application scenarios. The most commonly used alloy series include:
| Alloy Series | Key Alloying Elements | Core Properties | Typical Applications |
|---|---|---|---|
|
1000 Series Pure Aluminum: 1100, 1050, 1060, 1070 |
Aluminum ≥ 99.0% | Excellent corrosion resistance, high thermal/electrical conductivity, good ductility | Food packaging, heat exchangers, decorative materials |
|
3000 Series Al-Mn Alloy: 3003, 3004, 3104, 3105 |
Manganese (1.0%–1.5%) | Balanced strength and formability, enhanced corrosion resistance vs pure aluminum | Kitchenware, automotive parts, construction panels |
|
5000 Series Al-Mg Alloy: 5005, 5052, 5754, 5182, 5083 |
Magnesium (1.0%–5.0%) | High strength, superior corrosion resistance (especially seawater), weldable | Marine components, pressure vessels, architectural cladding |
|
8000 Series Al-Li Alloy: 8011, 8006, 8021 |
Lithium, trace elements | Lightweight, high strength-to-weight ratio | Aerospace components, high-end automotive parts |
Our Specifications
-
📏 Thickness
0.2mm – 10.0mm
Thinner coils ≤ 0.2mm are often called "foil coils" -
↔ Width
800mm – 2500mm
Custom widths available via slitting -
⚖ Coil Weight
500kg – 5,000kg
Varies by thickness and width to facilitate handling -
⭕ Inner Diameter
505mm (standard)
For compatibility with rolling and processing equipment
Mechanical Properties (Typical Alloy: 3003 Aluminum Coil)
Mechanical properties of Aluminum Coil are significantly influenced by processing temper (heat treatment or cold working state). Taking 3003 alloy (the most widely used aluminum coil material) as an example, its key mechanical indicators are shown in the table below:
| Temper | Tensile Strength (σb, MPa) | Yield Strength (σ0.2, MPa) | Elongation (δ, %) | Application Note |
|---|---|---|---|---|
| O (Annealed) | 90 – 130 | ≤ 40 | ≥ 25 | Complex forming (deep drawing, stamping) |
| H14 (Semi-Hard) | 130 – 180 | 110 – 150 | ≥ 5 | Structural parts with moderate strength |
| H18 (Full Hard) | ≥ 180 | ≥ 160 | ≥ 3 | Load-bearing components without secondary forming |
Core Characteristics
Efficient Processing
The coil form allows continuous production processes such as slitting, stamping, and rolling, reducing material waste and improving production efficiency compared to discrete sheet materials.
Lightweight Advantage
With a density of approximately 2.7g/cm³ (about 1/3 of steel), it reduces the weight of end products, which is crucial for automotive lightweighting and architectural load reduction.
Superior Corrosion Resistance
Aluminum naturally forms a dense oxide film on the surface, preventing further oxidation. Alloying elements (e.g., manganese, magnesium) can further enhance corrosion resistance for harsh environments.
Excellent Thermal & Electrical Conductivity
Superior to most metals except copper, making it ideal for heat exchangers, radiators, and electrical conductors.
Strong Surface Treatment Adaptability
Compatible with anodizing, powder coating, electrophoresis, polishing, and printing, meeting both decorative and functional requirements (e.g., wear resistance, insulation).
Key Application Fields
| Industry | Specific Applications | Preferred Alloy Series |
|---|---|---|
| 🏗 Construction | Roofing, wall cladding, ceiling panels, decorative strips, window frames | 3000 Series, 5000 Series |
| 📦 Packaging | Food cans, beverage cans, foil containers, flexible packaging (aluminum-plastic composite) | 1000 Series, 3000 Series |
| 🚗 Automotive | Body panels, heat shields, radiators, interior decorative parts | 3000 Series, 5000 Series, 8000 Series |
| 💡 Electronics | Heat sinks for electronic devices, capacitor casings, cable sheaths | 1000 Series, 3000 Series |
| 🏭 Industrial Equipment | Heat exchanger fins, chemical storage tank liners, conveyor belts | 3000 Series, 5000 Series |
Quality Control & Storage Notes
- Quality Control Indicators: Thickness tolerance (±0.02mm for precision coils), surface quality (no scratches, oil stains, or oxidation spots), flatness (to avoid warping during processing), and mechanical property consistency (batch sampling inspection).
- Storage Recommendations: Store in a dry, well-ventilated warehouse to prevent moisture-induced oxidation; place coils on dedicated supports to avoid deformation; avoid direct contact with corrosive substances; cover with waterproof and dustproof materials if stored outdoors temporarily.
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Frequently Asked Questions (FAQ)
Q What is the difference between 1000 Series and 3000 Series aluminum coils?
1000 Series aluminum coils are made of pure aluminum (≥99.0%) and offer the highest electrical and thermal conductivity along with excellent corrosion resistance, making them ideal for food packaging and electrical applications. 3000 Series coils incorporate manganese (1.0%–1.5%), which improves strength and formability while maintaining good corrosion resistance, making them better suited for kitchenware, automotive parts, and construction panels.
Q What thickness range is available for aluminum coils?
Our aluminum coils are available in thicknesses ranging from 0.2mm to 10.0mm. Coils thinner than 0.2mm are typically classified as aluminum foil coils. Custom thicknesses can be arranged based on specific industrial requirements.
Q How does the processing temper affect aluminum coil mechanical properties?
Processing temper significantly affects strength, hardness, and ductility. For example, in 3003 aluminum coil: O (Annealed) temper offers the highest elongation (≥25%) and is best for deep drawing; H14 (Semi-Hard) provides a balance of strength and formability; H18 (Full Hard) delivers maximum tensile strength (≥180 MPa) for load-bearing applications without further forming.
Q Which aluminum coil alloy is best for marine or outdoor environments?
The 5000 Series (Al-Mg alloys such as 5052, 5083, 5754) is the preferred choice for marine and outdoor environments. These alloys offer superior corrosion resistance, especially against seawater and salt spray, along with high strength and excellent weldability, making them ideal for marine components, pressure vessels, and architectural cladding.
Q What surface treatments are compatible with aluminum coils?
Aluminum coils are highly adaptable to a wide range of surface treatments, including anodizing, powder coating, electrophoresis, polishing, and printing. These treatments enhance both decorative appearance and functional performance such as wear resistance, corrosion protection, and electrical insulation.
Q How should aluminum coils be stored to prevent quality degradation?
Aluminum coils should be stored in a dry, well-ventilated warehouse to avoid moisture-induced oxidation. They should be placed on dedicated supports to prevent deformation, kept away from corrosive substances, and covered with waterproof and dustproof materials if temporarily stored outdoors. Maintaining proper storage conditions ensures the surface quality and mechanical properties remain consistent.