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.
Description
Yutwin New Materials specializes in the production of aluminum coils and sheets in a wide range of alloys, grades, and specifications, offering stable quality, flexible customization, and reliable supply to meet the diverse needs of different industries.
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.
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 |
Common Aluminum Surface Treatments
Polishing
Polishing uses mechanical grinding, chemical, or electrochemical methods to improve the smoothness and brightness of aluminum surfaces. Polished aluminum features a high-gloss finish and excellent decorative appearance.
Brushing
Brushing is a surface treatment process that creates fine, directional textures on aluminum using abrasive belts or brushes. The brushed surface provides a refined metallic appearance while helping conceal minor scratches.
Coating
Coating applies a protective coating onto the aluminum surface through powder coating, liquid spraying, or other coating methods. It provides excellent weather resistance, corrosion protection, and a wide range of color options. Coated aluminum offers both decorative appeal and long-term durabilit.
Anodizing
Anodizing is an electrochemical process that forms a dense oxide layer on the aluminum surface, improving corrosion resistance, wear resistance, and surface hardness. The oxide layer can also be colored to achieve various finishes.
Sand Blasting
Sand blasting uses high-speed abrasive particles to impact the aluminum surface, creating a uniform matte texture. This process provides a soft metallic appearance, reduces fingerprint marks, and improves coating adhesion for subsequent finishing processes.
Embossing
Embossing is a process that forms raised or recessed patterns on aluminum surfaces through rolling or stamping. Common patterns include stucco, diamond, and wood grain textures. Embossed aluminum offers excellent decorative effects, scratch resistance, and certain anti-slip properties.
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.
