What Is an Aluminum Coil?
Aluminum coil is a continuous strip of aluminum sheet that is wound into a roll form. It is typically produced through hot rolling or cold rolling processes and widely used in automotive, construction, electronics, HVAC, packaging, and industrial manufacturing.
Available in different alloys, tempers, widths, and thicknesses, aluminum coils offer a lightweight, corrosion-resistant, formable, and conductive material for a wide array of applications.
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Available Alloys and Tempers
✅ Common Aluminum Coil Grades
| Grade | Properties | Applications |
|---|---|---|
| 1050 / 1060 / 1100 | Commercially pure, high conductivity, soft | Electrical, signage, chemical vessels |
| 3003 | Moderate strength, corrosion-resistant, good formability | Roofing, gutter, packaging |
| 5052 | High fatigue strength, excellent weldability | Marine, transport, fuel tanks |
| 5083 | Exceptional corrosion resistance | Marine, LNG tanks, structural |
| 6061 | High strength, heat-treatable | Aerospace, structural components |
| 8011 | Excellent for foil and packaging | Food packaging, insulation foil |
✅ Common Tempers
| Temper | Description |
|---|---|
| O | Annealed, softest state |
| H14 / H24 / H18 | Strain-hardened for strength |
| T6 / T651 | Heat-treated for high strength |
| H32 / H34 | Half hard / full hard for structural use |
✅ Technical Specifications of Aluminum Coil
| Parameter | Specification |
|---|---|
| Product Name | Aluminum Coil |
| Alloys Available | 1050, 1060, 1100, 3003, 3004, 3105, 5052, 5083, 6061, 8011 |
| Temper | O, H12, H14, H24, H32, H34, H18, T6 |
| Thickness Range | 0.2 mm – 6.0 mm |
| Width Range | 20 mm – 2000 mm |
| Coil Inner Diameter | 150 mm, 305 mm, 405 mm, 508 mm |
| Coil Weight | 500 kg – 5000 kg per coil |
| Surface Finish | Mill finish, Anodized, Embossed, Color coated, Polished |
| Standards | ASTM B209, EN 485, GB/T 3880, JIS H4000 |
| MOQ | 1 ton |
| Packaging | Eye to wall or eye to sky, wooden pallets, waterproof wrapping |
| Certificates | ISO 9001, SGS, BV, RoHS, Mill Test Certificate (MTC) |
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Surface Treatment Options
| Finish | Description | Applications |
|---|---|---|
| Mill Finish | Natural rolled surface | General fabrication |
| Color Coated | Painted with polyester or PVDF coating | Roofing, cladding |
| Anodized | Electrochemically treated for corrosion resistance | Electronics, decoration |
| Embossed | Stucco, diamond, orange peel pattern | Insulation, building material |
| Mirror Polished | Highly reflective surface | Decorative, appliance panels |
Product Packaging
Adopting a professional industrial packaging solution that is moisture-proof and scratch resistant, each batch of steel is tied and fixed with customized wooden frames/steel strips, combined with anti rust coatings and cushioning pads to ensure zero damage during transportation. Clear product model, batch number, and storage identification on the outer packaging, supporting customized enterprise logos and information labels. Environmentally friendly and recyclable packaging materials practice green concepts, reducing transportation and disassembly costs.
Key Features of Aluminum Coils
✅ Lightweight – Weighs only one-third of steel
✅ Corrosion Resistance – Performs well in humid, chemical, and marine environments
✅ Excellent Formability – Can be stamped, bent, rolled, or deep-drawn
✅ Good Thermal and Electrical Conductivity – Ideal for heat exchangers and electronics
✅ Aesthetic Surface – Smooth and often anodized or color-coated
✅ Recyclable – 100% recyclable without loss of quality
Aluminum Coil Production Process
Casting – Molten aluminum is cast into slabs
Hot Rolling – The slab is hot rolled into coils of desired thickness
Cold Rolling – Further processed to refine thickness and improve strength
Annealing or Heat Treatment – To reach desired mechanical properties
Finishing – Surface treatments such as anodizing, coating, or embossing
Slitting & Packaging – Coils are cut to width, rewound, and packaged
Coil Weight Calculation Formula
To estimate the weight of an aluminum coil:
Weight (kg) = (Thickness mm × Width mm × Length mm × Density) / 1,000,000
Density of aluminum = 2.71 g/cm³
Aluminum Coil vs. Steel Coil
| Property | Aluminum Coil | Steel Coil |
|---|---|---|
| Weight | Lightweight (1/3 of steel) | Heavier |
| Corrosion Resistance | Excellent | Requires coating |
| Strength | Lower (unless alloyed) | Higher structural strength |
| Conductivity | Very good | Moderate |
| Cost | Higher (per kg) | Lower |
| Recyclability | 100% recyclable | Also recyclable |
Buying Guide: How to Choose the Right Aluminum Coil?
Define the Application – Is it for roofing, HVAC, packaging, or electronics?
Choose the Right Alloy – 3003 for roofing, 5052 for marine, 1060 for signage, etc.
Select the Thickness & Width – Based on equipment compatibility and usage
Decide on Surface Finish – Mill finish, embossed, color-coated, anodized?
Confirm Standards – Ensure compliance with ASTM, EN, or GB/T standards
Consider Coil ID & Packaging – Based on your processing equipment
Common Applications
Construction & Building Materials
Roofing and cladding
Gutters and downspouts
Ceiling panels and composite panels
Roller shutters and curtain walls
Automotive & Transportation
Heat shields
Trailer panels and truck bodies
Fuel tank covers
Reflective insulation
HVAC & Refrigeration
Fins for air conditioning units
Evaporators and condensers
Radiators and thermal insulation
Packaging Industry
Aluminum foil production
Food and pharmaceutical packaging
Beverage can lids and tabs
Quality Control and Testing
All coils undergo strict quality control, including:
✅ Chemical composition testing (Spectrometer)
✅ Mechanical property tests (Tensile, yield, elongation)
✅ Surface inspection for scratches, oil spots, and roll marks
✅ Thickness and width tolerance verification
✅ Coating adhesion (for color-coated coils)
Frequently Asked Questions (FAQs)
Q1: What is the difference between aluminum coil and aluminum sheet?
Aluminum coil is a continuous roll of sheet, while aluminum sheet is flat-cut to specific lengths. Coils are ideal for continuous processing or roll forming.
Q2: Can aluminum coil be used outdoors?
Yes, especially 5052, 3003, and anodized or color-coated coils offer excellent weather and corrosion resistance for outdoor applications.
Q3: What are common aluminum coil sizes?
Standard thickness: 0.2 mm to 6 mm
Widths: 100 mm to 2000 mm
Coil weights: 500 kg to 5000 kg
Q4: Can you slit the coil into strips?
Yes. We provide coil slitting services into custom widths, ideal for stamping, punching, or further forming.
Q5: Is there a minimum order quantity (MOQ)?
MOQ is generally 1 ton, but for stock items or sample orders, smaller quantities may be available.
Why Global Clients Choose Us?
Henan Gengfei Industrial Co., Ltd. is China’s leading supplier of steel and other metal products. Our company is dedicated to providing its customers with the quick quotes, superior quality products, competitive prices and fastest possible deliveries.
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Looking for a reliable supplier of aluminum bars in various shapes and alloys? Contact us for technical consultation, pricing, and delivery options. We provide OEM, bulk orders, and international shipping.
