What is 3105 Aluminum Coil?
When construction companies and metal fabricators look for a reliable, cost-effective material for roofing and wall panels, 3105 aluminum coil is often their first choice.
3105 aluminum coil is a non-heat-treatable alloy belonging to the 3xxx series (Aluminum-Manganese alloys). It is essentially a modified version of the common 3003 aluminum. By adding a very small amount of magnesium and other elements, 3105 aluminum gains higher strength than pure 1xxx series aluminum and standard 3003 aluminum, while keeping the excellent workability that factories need.
Most importantly, 3105 aluminum has outstanding surface properties. It accepts paint and color coatings much better than many other metal alloys. Because of this, it is widely recognized as the standard base material for pre-painted aluminum coils (PPAL) used in the modern building and construction industry.
Why Choose 3105 Aluminum for Building?
- Corrosion Resistance: Building materials face rain, sun, and snow every day. 3105 aluminum forms a natural oxide layer that stops rust. It is perfect for outdoor environments, even in damp coastal areas.
- Easy Formability: Factories need a metal that can be fed into fast roll-forming machines without breaking. 3105 aluminum bends easily into complex shapes like corrugated panels or rain gutters without cracking at the corners.
- Excellent Coating Adhesion: The surface of 3105 aluminum bonds perfectly with industrial paints. This ensures the color does not peel or fade off the roof after a few years.
- Cost-Effective: It offers better strength than 3003 but is significantly cheaper than marine-grade 5xxx series alloys. It is the most economical choice for large-scale construction materials.
3105 Aluminum Coil Chemical Composition
| Element | 3105 |
| Silicon | 0.6 |
| Iron | 0.7 |
| Copper | 0.30 |
| Manganese | 0.30-0.8 |
| Magnesium | 0.20-0.8 |
| Chromium | 0.20 |
| Zinc | 0.40 |
| Titanium | 0.10 |
| Aluminum | balance |
| Other Elements (each) | 0.05 |
| Other Elements (total) | 0.15 |
3105 Aluminum Coil Mechanical Property Limits
| Temper | Specified Thickness(in) | Tensile Strength - KSI | Elongationin 2 inches % | |||
| Ultimate | Yield | |||||
| Min | Max | Min | Max | |||
| H12 | 0.017 - 0.019 | 19 | 26 | 15 | - | 1 |
| H12 | 0.020 - 0.031 | 19 | 26 | 15 | - | 1 |
| H12 | 0.032 - 0.050 | 19 | 26 | 15 | - | 2 |
| H12 | 0.051 - 0.080 | 19 | 26 | 15 | - | 3 |
| H14 | 0.013 - 0.019 | 22 | 29 | 18 | - | 1 |
| H14 | 0.020 - 0.031 | 22 | 29 | 18 | - | 1 |
| H14 | 0.032 - 0.050 | 22 | 29 | 18 | - | 2 |
| H14 | 0.051 - 0.080 | 22 | 29 | 18 | - | 2 |
| H16 | 0.013 - 0.031 | 25 | 32 | 21 | - | 1 |
| H16 | 0.032 - 0.050 | 25 | 32 | 21 | - | 2 |
| H16 | 0.051 - 0.080 | 25 | 32 | 21 | - | 2 |
| H18 | 0.013 - 0.031 | 28 | - | 24 | - | 1 |
| H18 | 0.032 - 0.050 | 28 | - | 24 | - | 1 |
| H18 | 0.051 - 0.080 | 28 | - | 24 | - | 2 |
| H25 | 0.013 - 0.019 | 23 | - | 19 | - | 2 |
| H25 | 0.020 - 0.031 | 23 | - | 19 | - | 3 |
| H25 | 0.032 - 0.050 | 23 | - | 19 | - | 4 |
| H25 | 0.051 - 0.080 | 23 | - | 19 | - | 6 |
| O | 0.013 - 0.019 | 14 | 21 | 5 | - | 16 |
| O | 0.020 - 0.031 | 14 | 21 | 5 | - | 18 |
| O | 0.032 - 0.080 | 14 | 21 | 5 | - | 20 |
Physical Properties for Aluminim 3105
| Property | 3105 Data |
| Density, lb/in3 | 0.0983 |
| Modulus of Elasticity, psi | 10.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 12.1 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 99 |
| Specific Heat, Btu/lb ˚F | 0.214 |
| Electrical Resistivity, Microohm-in | 1.504 |
Send GNEE your target thickness, width, and color requirements today. Our sales team will reply within 24 hours with a highly competitive factory-direct price.
Common Building Applications of 3105 Aluminum Coil
Roofing Systems
Corrugated Roofing Sheets: The wavy metal panels commonly used on factory roofs and farm buildings.
Trapezoidal Roof Panels: Flat panels with raised ribs, popular for modern commercial warehouses.
Standing Seam Roofing: High-end, leak-proof roofing systems used on modern residential homes and sports stadiums.
Wall Cladding and Facades
Exterior Wall Panels: Used to cover the outside of commercial buildings to give them a clean, modern, and colorful look.
Aluminium Composite Panels (ACP): 3105 aluminum is often used as the top and bottom metal skins for composite building boards.
Other Construction Uses
Rain Gutters and Downspouts: Because it does not rust when constantly exposed to water, 3105 is the top choice for residential water drainage systems.
Ceiling Panels: Used in large public buildings like airports and shopping malls.
Insulation Jacketing: Used to wrap and protect hot pipes and HVAC ducts in industrial plants.
3105 H14 Vs. 3105 H19 Aluminum
|
Property |
3105-H14 Aluminum |
3105-H19 Aluminum |
|
Temper |
Strain hardened to H14 |
Strain hardened to H19 |
|
Tensile Strength (Ultimate) |
160-205 MPa (23,200-29,700 psi) |
240 MPa (35,000 psi) |
|
Tensile Strength (Yield) |
145 MPa (21,000 psi) |
220 MPa (31,900 psi) |
|
Elongation at Break |
2-4% |
1.1% |
|
Fatigue Strength |
69 MPa (10,000 psi) |
67 MPa (9,700 psi) |
|
Shear Strength |
110 MPa (16,000 psi) |
140 MPa (20,300 psi) |
|
Corrosion Resistance |
Excellent |
Excellent |
|
Weldability |
Excellent |
Excellent |
|
Machinability |
Poor, improved in harder tempers |
Poor, improved in harder tempers |
|
Formability |
Good, but less than O temper |
Good, but less than O temper |
|
Applications |
Residential siding, mobile homes, sheet metal work |
High-strength applications requiring minimal ductility |
3105 vs 3003 vs 5052 Aluminum for Building
| Property | 3105 Aluminum | 3003 Aluminum | 5052 Aluminum |
|---|---|---|---|
| Typical Tensile Strength (MPa) | 150 – 200 MPa | 110 – 145 MPa | 210 – 260 MPa |
| Yield Strength (MPa) | 130 – 180 MPa | 40 – 110 MPa | 130 – 200 MPa |
| Elongation (%) | 10 – 20% | 20 – 30% | 10 – 20% |
| Hardness (HB) | ~40 – 55 | ~28 – 45 | ~60 – 75 |
| Corrosion Resistance | Good (atmospheric) | Good | Excellent (marine-grade) |
| Coating Adhesion | Excellent (pre-painted optimized) | Good | Moderate |
| Density (g/cm³) | 2.73 | 2.73 | 2.68 |
| Typical Price Level | Medium | Low | High |
| Main Alloying Element | Mn + Mg (~0.5%) | Mn (~1.2%) | Mg (~2.5%) |
| Typical Applications | Roofing, wall cladding | General sheet, ducting | Marine panels, high-end facade |
If you are making simple bare metal parts, 3003 is slightly cheaper. If you are building a boat, you need 5052. But if you are manufacturing painted building materials, 3105 is the most cost-effective and best-performing choice.
Contact our technical team today. We have over 18 years of experience supplying roofing manufacturers and can help you select the exact specifications you need.
How is the Price Calculated?
The pricing formula is:
SMM Aluminum Ingot Price + Processing Fee + Coating Cost = Final Price
- SMM Price: The Shanghai Metals Market daily rate for raw aluminum. This changes daily based on global economics.
- Processing Fee: The factory cost to melt, roll, and cut the metal to your specific thickness and width.
- Coating Cost: The cost of the paint and the baking process. PVDF paint costs more than PE paint.
Example Price Calculation:
Let us assume you are buying 0.5mm PE-coated 3105 aluminum coil.
- SMM Base Price today: USD 2,400 / ton
- Rolling Processing Fee: USD 400 / ton
- PE Coating Cost: USD 300 / ton
Estimated Total Price: USD 3,100 / ton (EXW terms).
Note: This is a reference example. Final prices depend on your exact order volume, paint brand, and current market conditions.
Quality Control Standards
At GNEE, we ensure every roll of 3105 pre-painted aluminum coil passes strict quality control before it leaves our factory.
We produce according to ASTM B209 and EN 485 standards, and our factory operates under the ISO 9001 system.
Key tests we perform include:
- Coating Thickness Test: We use digital micrometers to ensure the PE or PVDF paint layer meets the exact micron thickness you ordered.
- T-Bend Test: We bend the painted sample sharply to check if the paint cracks at the folded edge. If it passes, it will easily survive your roll-forming machine.
- Cross-Hatch Adhesion Test: We cut a grid into the paint and apply strong tape. When the tape is ripped off, the paint must stay perfectly attached to the aluminum surface.
- MEK Wiping Test: We rub the surface with a strong chemical solvent to prove the paint has been fully baked and cured in the oven.
Why Buy from GNEE?
- 18+ Years Experience: We specialize in aluminum products and understand the exact needs of the construction and roofing industries.
- Advanced Coating Lines: Our automated color-coating lines ensure zero color difference between different batches of the same order.
- Custom Color Matching: Send us a sample of your current roof color, and our lab will match the exact RAL paint formula.
- Fast Delivery: With stable raw material inventory, standard orders are completed and shipped within 15 to 25 days.
- Professional Export Packing: We use eye-to-wall or eye-to-sky packaging with waterproof paper, plastic film, and heavy-duty wooden pallets to ensure your coils arrive without any sea-water damage or edge dents.
Send an email to the GNEE team with your material specifications. We provide fast quotes, professional advice, and secure shipping directly to your local port.
