2mm 3mm 4mm Aluminum Coil

06/05 2025

Aluminum coils with thicknesses of 2mm, 3mm, and 4mm have become essential materials in various industries due to their exceptional physical properties and versatility. These coils are widely used in manufacturing, construction, transportation, and many other sectors requiring lightweight yet sturdy materials.

Aluminum coils are thin, flat sheets of aluminum rolled into coil form after processing. Due to aluminum's low density, good corrosion resistance, excellent thermal and electrical conductivity, and moderate strength, aluminum coils can meet strict performance requirements across multiple industries.

Common Thickness Options:

2mm: Offers a precise balance of flexibility and strength.
3mm: Ideal for more structural applications needing enhanced rigidity.
4mm: Used when maximum strength and firmness are prioritized in heavy-duty contexts.

2. Features of 2mm, 3mm and 4mm Aluminum Coils

Feature	Description
Material	Usually 1000, 3000, 5000 series aluminum alloys for optimal balance of strength & flexibility
Thickness	Available in 2mm, 3mm, and 4mm gauge, ensuring customization to project demands
Corrosion Resistance	Excellent due to the formation of a protective oxide layer
Weight	Lightweight compared to steel, facilitating better load efficiency in engineering designs
Surface Finish	Available in mill finish, anodized, painted (PVDF), or embossed depending on requirements
Formability	Good malleability enabling bending, shaping, punching, and cutting during fabrication
Thermal Conductivity	High thermal conductivity allows efficient heat dissipation (approx. 205 W/mK)
Recyclability	Environmentally friendly, 100% recyclable without loss of properties

3. Chemical Composition

Alloy Group	Element	Typical Composition (wt%)
1xxx Series	Aluminum (Al)	99.0% minimum
	Silicon (Si)	≤ 0.25
	Iron (Fe)	≤ 0.40
	Copper (Cu)	≤ 0.05
3xxx Series	Aluminum (Al)	Balance
	Manganese (Mn)	1.0 - 1.5
	Silicon (Si)	≤ 0.60
	Iron (Fe)	≤ 0.70
5xxx Series	Aluminum (Al)	Balance
	Magnesium (Mg)	3.0 - 5.0
	Manganese (Mn)	0.3 - 1.0
	Iron (Fe)	≤ 0.40

Note: Alloy choice varies by user requirement — 1xxx for pure aluminum uses, 3xxx or 5xxx for more enhanced mechanical strength.

4. Mechanical Properties

Thickness (mm)	Alloy Series	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Hardness (HB)
2	1050 (1xxx)	≥ 40	70 - 110	≥ 12	25 - 35
3	3003 (3xxx)	≥ 95	140 - 175	≥ 12	45 - 60
4	5005 (5xxx)	≥ 145	215 - 280	≥ 10	60 - 80

5. Typical Applications

Industry	Application Examples	Suitable Alloy / Thickness
Architecture	Roof panels, curtain walls, facades, window frames	3mm - 4mm, 3003 & 5005 alloys
Transportation	Body panels for trucks, trailers, bus, train carriages	2mm - 4mm, 5005 with strengthened properties
Packaging	Household roofing sheets, packing containers, cans	2mm, 1xxx series
Marine	Boat panels, decks, and hull of smaller watercraft	4mm, 5xxx series (high corrosion resistance)
Electrical	Heat sinks, transformers, electrical enclosures	2mm, 1xxx series, due to good conductivity
General Fabrication	HVAC ducts, cladding, roofing, appliances	2mm to 4mm, mixed alloys

6. Advantages of Choosing 2mm - 4mm Aluminum Coil

Weight Efficiency: Optimum gauge selection reduces weight without compromising strength.
Rust Proof: Survives harsh climates reducing maintenance costs.
Processable: Easily cut, bent, stamped, welded, allowing flexible manufacturing workflows.
Cost-effective: Reasonable cost compared to thicker metals with equivalent durability.
Visual Appeal: Options for anodizing/painting enhance aesthetics and protect surfaces.

7. Conclusion

The 2mm, 3mm, and 4mm aluminum coils serve extensive industrial needs by combining light weight with sustainable endurance, exceptional surface finish, and good formability properties. With variable alloys catering to different hardness, corrosion resistance, and thermal properties, manufacturers and architects benefit from these coated and non-coated aluminum coils in diverse applications ranging from architecture to automotive and marine. Choosing the correct coil thickness and the right alloy can optimize both product performance and life cycle cost.

Working with 2mm, 3mm, and 4mm aluminum coils reveals distinct processing challenges and application-specific considerations. The 2mm coil, while readily formable and lightweight, is prone to scratching and marring during handling and fabrication. Its thinner gauge requires more careful attention to tooling and press settings to avoid buckling or tearing. We often see issues with consistent surface finish, especially on high-speed production lines, necessitating meticulous coil cleaning and potentially specialized lubrication techniques. The yield strength differences between batches of 2mm coil also demand careful monitoring of forming parameters to maintain consistent product quality.

Conversely, the 3mm and 4mm coils offer improved rigidity and strength, making them suitable for applications requiring greater durability. However, their increased thickness presents challenges in bending and forming, potentially requiring more powerful machinery and potentially leading to increased energy consumption. We've found that tooling wear and tear is significantly higher with thicker coils, requiring more frequent maintenance and tool replacements. Furthermore, the heavier weight necessitates more robust handling equipment and safer operational procedures. these differences in material behaviour and the associated processing needs allows for optimized production strategies and ultimately minimizes waste and maximizes efficiency.

For Inquiries and Orders:

Contact Haomei Aluminum CO., LTD., Inc. for high-quality aluminum coils with guaranteed specifications and prompt delivery tailored to your exact project needs.

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