When importing metal materials for construction, 3105 aluminum is a standard choice for roofing and wall cladding. However, buyers often face a technical question when placing an order: Should you choose the 3105 H14 or 3105 H24 aluminum plate?
Both tempers offer reliable performance, but they behave differently during the roll-forming process. Choosing the wrong temper can cause manufacturing issues, such as metal cracking during bending or lower structural strength in the final product.
What is 3105 Aluminum Alloy?
3105 aluminum is a 3000 series Aluminum-Manganese (Al-Mn) alloy. It is a "non-heat-treatable" metal. This means manufacturers cannot increase its strength through heating and cooling processes. Instead, we increase its strength through "cold working" (passing the flat metal through heavy rollers at room temperature to make it harder).
For building projects, 3105 is highly recommended for three main reasons:
- Excellent Corrosion Resistance: It naturally resists rain, humidity, and outdoor exposure, preventing the rust issues common in standard steel.
- Good Formability: It is highly workable, meaning it can be easily bent, stamped, and roll-formed into corrugated profiles without breaking.
- Perfect for Roofing: It offers a great balance of mechanical strength and lightweight properties, making it an ideal base material for color-coated (PPGI alternative) roofing panels.
Differences Between 3105-H14 Aluminum and 3105-H24 Aluminum
What is 3105-H14?
The H14 temper means the aluminum is work-hardened only. After the cold rolling process brings the sheet to the target thickness, we do not apply any further heat treatment.
Material Status: It is classified as "half hard."
Performance: Because it is not heated to relieve internal stress, H14 maintains very stable structural strength. It is stiff, rigid, and holds its shape perfectly once installed on a building framework.
What is 3105-H24?
The H24 temper means the aluminum is work-hardened first and then partially annealed (heated at a specific, controlled temperature).
Material Status: It is also technically a "half hard" condition, but the heating process removes the internal stress built up during rolling.
Performance: This partial annealing gives the metal higher ductility. It is slightly softer than H14, making it much more flexible and easier to bend without cracking at the edges.
| Temper | Manufacturing Process | Material Status | Key Benefit for Buyers |
| 3105-H14 | Cold rolling only (No heat treatment) | Half hard | Maximum rigidity and wind load resistance |
| 3105-H24 | Cold rolling + Partial annealing | Half hard (stress-relieved) | Prevents cracking during deep bending |
3105-H14 Aluminum vs. 3105-H24 Aluminum Mechanical Properties
| Property | 3105-H14 Aluminum | 3105-H24 Aluminum |
| Brinell Hardness | 48 | 47 |
| Elastic (Young's, Tensile) Modulus | 10 x 10⁶ psi | 10 x 10⁶ psi |
| Elongation at Break (%) | 2.7 | 5.6 |
| Fatigue Strength (x 10³ psi) | 9.9 | 11 |
| Poisson's Ratio | 0.33 | 0.33 |
| Shear Modulus (x 10⁶ psi) | 3.8 | 3.8 |
| Shear Strength (x 10³ psi) | 15 | 15 |
| Tensile Strength: Ultimate (UTS) | 25 x 10³ psi | 25 x 10³ psi |
| Tensile Strength: Yield (Proof) | 21 x 10³ psi | 21 x 10³ psi |
3105-H14 Aluminum vs. 3105-H24 Aluminum Thermal Properties
| Property | 3105-H14 Aluminum | 3105-H24 Aluminum |
| Latent Heat of Fusion (J/g) | 400 | 400 |
| Maximum Temperature: Mechanical (°F) | 360 | 360 |
| Melting Completion (Liquidus) (°F) | 1210 | 1210 |
| Melting Onset (Solidus) (°F) | 1180 | 1180 |
| Specific Heat Capacity (BTU/lb-°F) | 0.21 | 0.21 |
| Thermal Conductivity (BTU/h-ft-°F) | 98 | 98 |
| Thermal Expansion (µm/m-K) | 24 | 24 |
3105-H14 Aluminum vs. 3105-H24 Aluminum Electrical Properties
| Property | 3105-H14 Aluminum | 3105-H24 Aluminum |
| Electrical Conductivity: Equal Volume (% IACS) | 44 | 44 |
| Electrical Conductivity: Equal Weight (% IACS) | 140 | 140 |
Otherwise Unclassified Properties
| Property | 3105-H14 Aluminum | 3105-H24 Aluminum |
| Base Metal Price (% relative) | 9.5 | 9.5 |
| Calomel Potential (mV) | -750 | -750 |
| Density (lb/ft³) | 170 | 170 |
| Embodied Carbon (kg CO₂/kg material) | 8.2 | 8.2 |
| Embodied Energy (x 10³ BTU/lb) | 66 | 66 |
| Embodied Water (gal/lb) | 140 | 140 |
Common Calculations
| Property | 3105-H14 Aluminum | 3105-H24 Aluminum |
| Resilience: Ultimate (Unit Rupture Work) (MJ/m³) | 4.5 | 9.1 |
| Resilience: Unit (Modulus of Resilience) (kJ/m³) | 160 | 140 |
| Stiffness to Weight: Axial (points) | 14 | 14 |
| Stiffness to Weight: Bending (points) | 50 | 50 |
| Strength to Weight: Axial (points) | 17 | 18 |
| Strength to Weight: Bending (points) | 25 | 25 |
| Thermal Diffusivity (mm²/s) | 68 | 68 |
| Thermal Shock Resistance (points) | 7.5 | 7.6 |
Applications of 3105-H14 and 3105-H24 Aluminum
Applications of 3105-H14 Aluminum Alloy
The H14 temper is highly rigid. It is the best choice for products that bear static (stationary) loads and require high strength but do not need extensive bending or deep stretching.
| Application Category | Practical Examples | Why H14 is Suitable |
| Building Structures & Flat Sheets | Flat roofing panels, wall cladding, static building frames | Offers high strength and stiffness; perfect for structural parts that bear significant static loads without deformation. |
| Container Manufacturing | Storage tanks, industrial vessels | High hardness and excellent corrosion resistance; resists plastic deformation when holding heavy, stationary loads. |
| Household Appliances | Refrigerator and AC housings, washing machine frames | Provides a smooth, flat surface with strong rust resistance, ensuring long-term stability for exterior components. |
| Sign Boards | Outdoor commercial and traffic signs | Keeps the board perfectly rigid so it does not bend or warp under strong wind pressure. |
Applications of 3105-H24 Aluminum Alloy
The H24 temper has been partially annealed to relieve stress. It offers higher ductility, flexibility, and fatigue resistance.
| Application Category | Practical Examples | Why H24 is Suitable |
| Corrugated & Coastal Roofing | Wave or trapezoidal roofing (often paired with PVDF coating) | Highly ductile; safely absorbs roll-forming stress to prevent edge cracking. |
| Transportation Vehicles | Auto exterior panels, vehicle frames, small boat hulls | Excellent fatigue resistance; handles the constant vibrations and shocks that vehicles experience during movement. |
| Deep Forming & Auto Parts | Stamped car doors, hoods, and deep-drawn parts | High flexibility allows the metal to stretch and form into complex shapes without tearing. |
| Piping & Pressure Vessels | Pipeline systems, industrial piping | Strong fatigue resistance allows the metal to withstand long-term dynamic pressure and cyclic loads safely. |
| Electronic Equipment Housings | Protective outer shells for devices | Good impact toughness protects sensitive internal electronic components from external shocks. |
| High-Performance Structures | Bridges, mechanical equipment frames | Maintains structural integrity when enduring repetitive, cyclic loads over a long service life. |
Contact GNEE today with your specific application, and our technical team will provide the exact material data and a fast, accurate price quote.
Processing & Forming Performance
Here is how 3105-H14 and 3105-H24 perform during standard factory processing:
- Corrugation (Roll Forming): When pressing flat sheets into trapezoidal or wave roofing profiles, the metal undergoes significant mechanical stress. H24 easily absorbs this stress, while H14 fights against it due to its high rigidity.
- Bending Performance: H24 offers much smoother bending. It will not spring back as much as H14, making it easier to achieve precise angles on your machinery.
- Minimum Bending Radius: 3105-H24 has a smaller minimum bending radius than H14. This means you can bend H24 into sharper, tighter angles without the metal fracturing or breaking.
Real Export Experience
Recently, we exported 270t of 3105 aluminum corrugated sheets to Mauritania and other African markets. For these regions, the most common thickness ordered by construction clients is between 0.5mm and 0.8mm.
If you are buying aluminum for a roofing project, choosing the correct temper and coating is critical for success. Let GNEE's export experience work for you.
Order Specification Details
Thickness: 0.7 mm
Width (before corrugation): 1250 mm
Length: 12,000 mm
Alloy: 3105
Temper: H14
Application: Aluminum Roofing sheets
More about: GNEE Exports 270T Of 3105 Aluminum Corrugated Sheets To Mauritania
Contact us today with your required alloy (3105), temper (H14 or H24), thickness, and target application. Our sales team will provide expert advice and a highly competitive quotation for your next shipment.
Quality Control & Testing at GNEE
To ensure you receive exactly what you ordered, GNEE follows strict international manufacturing standards, including ASTM B209 and EN 485. Before we ship your aluminum coils or corrugated sheets, our laboratory conducts the following tests:
| Testing Item | Purpose |
| Thickness Tolerance Test | Ensures the metal thickness is uniform so it feeds smoothly into your roll-forming machine without jamming. |
| Bending Test (T-Bend) | Verifies the flexibility of the metal and ensures no edge cracking occurs during processing. |
| Coating Adhesion Test | Confirms that the PE or PVDF paint is firmly bonded to the aluminum surface and will not peel. |
| Salt Spray Test | Proves the material's anti-corrosion performance, guaranteeing it will survive in harsh coastal environments. |
Packaging & Export
Shipping metal from China to Africa or the Middle East involves long ocean transits, high humidity, and multiple port transfers. Poor packaging leads to white rust and bent edges. GNEE uses heavy-duty, seaworthy packaging to ensure your goods arrive in perfect condition.
| Packaging & Logistics | Details |
| Moisture-Proof Protection | Wrapped closely with PVC film and heavy kraft paper. |
| Physical Protection | Sturdy edge protectors and strong steel strapping. |
| Pallets | Fumigated, seaworthy wooden pallets. |
| Container Loading | 20FT container typically loads 18 to 22 tons (safely blocked and braced to prevent shifting at sea). |
