In the vast world of aluminum alloys used in industrial and architectural applications, the Painted Aluminum Coil 3105 stands out for its excellent characteristics and versatility. Specifically engineered for durability and aesthetic appeal, this coil variant combines the natural strength and corrosion resistance of aluminum with an added layer of paint, broadening its scope of uses.
What is Painted Aluminum Coil 3105?
Aluminum Alloy 3105 is part of the 3xxx series containing manganese as its major alloy element, designed primarily for applications where strengthening while retaining good corrosion resistance is critical. The “Painted” attribute implies an added, pre-applied coated layer over the coil, typically using high-performance coatings like PPGI or PVDF, ensuring enhanced weatherability, wear resistance, and rich color retention.
Technical Profile of Aluminum Alloy 3105
- Chemical Composition (Typical values in %):| Element | Min | Max ||-----------------|---------|---------|| Aluminum (Al) | Balance | - || Manganese (Mn) | 0.8 | 1.3 || Copper (Cu) | 0.1 | 0.3 || Iron (Fe) | 0 | 0.7 || Silicon (Si) | 0 | 0.3 || Zinc (Zn) | 0 | 0.18 || Magnesium (Mg) | 0 | 0.1 || Titanium (Ti) | 0 | 0.15 |
The alloy’s proficiency stems from manganese which boosts tensile strength and hardening properties without significantly compromising corrosion resistance.
- Temper Conditions:3105 coils are often offered in:
- H14 temper: Hard, cold worked condition with good strength and moderate ductility.
- H24 temper: Quarter hard condition providing a higher strength but still formable.
- O temper: Annealed and soft state allowing for further forming or machining.
Physical and Mechanical Parameters
| Parameter | Typical Value |
|---|---|
| Density | 2.71 g/cm³ |
| Tensile Strength | 110 - 145 MPa |
| Yield Strength | 80 - 110 MPa |
| Elongation | 6 - 12 % |
| Thermal Conductivity | 145 W/m·K (approx.) |
| Melting Point | 600 - 650°C |
Performance Functions of Painted Aluminum Coil 3105
- Corrosion Resistance
The manganese-rich structure imparts a robust resistance to oxidation, making it ideally suited for outdoor installations. Painting the coil further enhances this by acting as a protective barrier from acidic rain, humidity, and other oxidation-causing elements.
- Aesthetic Versatility
Thanks to the customized paint applied, the coil comes ready for immediate use with a variety of finishes, glossy or matte, and UV resistance coatings that prevent fading even in harsh sun conditions. This quality renders 3105 coated coils popular in facade cladding, roofing panels, and signage.
- Formability & Workability
3105’s proven conductivity and fitness under different tempers ensure that aluminum from this alloy can withstand bending, rolling, and deep drawing with minimal risk of crack or fatigue, critical for components requiring intricate shapes.
- Thermal & Electrical Performance
Though not primarily an electrical conductor, the aluminum substrate has respectable thermal conductivity, which supports its usage in architectural components subjected to heat exchanges or heat dissipation.
Applications of Painted Aluminum Coil 3105:
- Building & Construction: Facades, roofing sheets, ceiling panels, gutters, and architectural decoration elements.
- Transportation: Exterior panels on railway coaches and other vehicle parts that necessitate corrosion resistance and durable painted finishes.
- Domestic Products: Kitchen appliances, air conditioning covers, water tanks, and other household items requiring both protection and color.
- Solar Panels: Frame structures requiring lightweight yet dependable materials tolerant to outdoor weather.
- Advertising Industry: Great for manufacturing billboards, signage and wrappers with both high visibility and dimensional stability.
Implementation Standards:
Painted Aluminum Coil 3105 is produced and tested under internationally recognized standards, such as:
- ASTM B209 — Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (including alloy 3105).
- EN 573-3 — Composition and forms Dimensions.
- GB/T 3191 — Aluminum and Aluminum Alloy Coil, standards focusing on chemical composition and mechanical strength.
- AAMA 2605 or Class 1 PVDF finish — Used for high-performance qualifiable coating longevity and gloss retention.
These guarantees enable OEMs and contractors to trust the coil’s compliance on whether for security-critical or aesthetic-driven external applications.
