3105 aluminum coil belongs to the 3000 series aluminum-manganese alloys, with manganese as the primary alloying element. Compared with 3003 aluminum, 3105 offers slightly higher strength while maintaining excellent formability and corrosion resistance, making it a popular choice for architectural and general-purpose applications.
Specifications
| Parameter | Description |
|---|---|
| Alloy | 3105 |
| Chemical Composition (%) | Al ≥ 98.9, Mn 0.3 – 0.8, Mg ≤ 0.8, Cu ≤ 0.30, Si ≤ 0.60, Fe ≤ 0.70, Zn ≤ 0.40, Others ≤ 0.05 |
| Temper | O, H12, H14, H16, H18, H22, H24 |
| Thickness Range | 0.2 – 6.0 mm (customizable) |
| Width | Customizable (20 – 2000 mm) |
| Coil Weight | Customizable |
| Inner Diameter (ID) | 150 / 300 / 505 mm |
| Surface Finish | Mill Finish, Bright, Brushed, Coated, Film Laminated (optional) |
| Standard | ASTM B209 / EN AW-3105 / GB/T 3880 |
Description
Features
- Aluminum–manganese alloy (Al–Mn)
Belongs to the 3xxx-series aluminum alloys, with manganese as the main alloying element and a small amount of magnesium for improved strength and corrosion resistance.
- Medium mechanical strength
Slightly stronger than 3003, suitable for general structural, load-bearing, and decorative applications.
- Excellent corrosion resistance
Resistant to atmospheric, marine, and industrial environments, ideal for outdoor and coastal applications.
- Good formability and workability
Soft and ductile, easy to roll, bend, stamp, and deep-draw, suitable for thin-gauge processing and complex shapes.
- Good thermal and electrical conductivity
Supports heat dissipation and moderate electrical applications.
- Smooth and uniform surface finish
Ideal for anodizing, painting, coating, embossing, or film lamination.
- Good weldability
Compatible with TIG, MIG, and spot welding for reliable fabrication.
- Lightweight material
Low density helps reduce overall weight while maintaining durability and functionality.
Typical Applications
- Architectural and building applications
Used for roofing, wall cladding, ceiling panels, curtain walls, handrails, and decorative sheets due to excellent corrosion resistance and smooth surface finish.
- Transportation and automotive parts
Suitable for automotive panels, truck and railway components, and lightweight transport structures where medium strength is required.
- Heat transfer and thermal applications
Applied in heat exchangers, cooling fins, and other components requiring good thermal conductivity.
- Chemical and industrial equipment
Suitable for tanks, containers, covers, and protective panels in mild chemical and industrial environments.
- Signage and decorative products
Commonly used for nameplates, signboards, reflectors, and decorative panels after anodizing or coating.
- General fabrication and forming
Ideal for stamping, bending, rolling, and deep-drawing of thin sheets and non-structural components.
