SENBO Building Materials supplies Alu-Mg-Mn Arched Roofing Panels as part of its metal roof system product range. These panels are manufactured from AA3004 series aluminum-magnesium-manganese alloy and are formed into curved, non-standard profiles to meet architectural requirements for complex roof geometries.
The Al-Mg-Mn arched roofing panel is a specialized profiled panel produced using high-speed, precision roll-forming equipment. The substrate composition includes 1.0%–1.5% manganese and 0.8%–1.3% magnesium, with aluminum making up the remainder. As a derivative of standard standing seam Al-Mg-Mn panels, the arched panel undergoes a specialized forming process to transform flat sheets into curved shapes. This supports modern architectural designs such as arched, curved, and spherical roof forms.
Available profiles include models such as YX65-300, YX65-330, YX65-400, YX65-430, YX65-500, and YX28-205-820. Fan-shaped and tapered panels can also be customized to meet specific project requirements.
These panels are widely used in the non-standard roofing systems of large public buildings, including airport terminals, stadiums, and conference and exhibition centers. The product surface is treated using a pre-roll coating process and is available with a PVDF fluorocarbon coating, combining architectural aesthetics with durability.
Aluminum-magnesium-manganese alloy offers a balance of strength and flexibility, making it suitable for forming complex roof shapes such as 3D curved, spherical, and fan-shaped surfaces. Through specialized curving and fan-shaped panel production technologies, these arched panels can meet diverse design requirements while maintaining watertight performance.
The product is applicable to various architectural forms, including roofs with positive or negative curvature, arched roofs, single- and double-slope roofs, interconnected roof structures, pitched roofs, and curved roofs.
The inter-warehouse canopy project at the Zhangzhou Grain Depot in Fujian utilized an aluminum-magnesium-manganese coated arched corrugated roof system. The structure spans 18 meters with a length of 108 meters, covering a total area of nearly 2,000 square meters.
The roof features YT6118 model aluminum-magnesium-manganese corrugated panels with a thickness of 1.2 mm. The arch height is 4.085 meters, and the rise-to-span ratio is 0.23. Installation was completed within six days. The panels were fabricated by seaming three smaller units into a single basic unit, which was then hoisted and secured to embedded steel components. The units were connected using a watertight seaming method.
Aluminum has a density of approximately 2.73 g/cm³, about one-third that of steel. Aluminum-magnesium-manganese panels exhibit a yield strength of at least 190 MPa, a tensile strength of 240–285 MPa, and an elongation of at least 3%. While maintaining structural integrity, these arched panels reduce the dead load of the roofing system.
In the Zhangzhou Grain Depot project, the design accounted for a uniformly distributed live load of 0.3 kN/m² and a design wind pressure of 0.40 kN/m² based on a 10-year return period.
The aluminum-magnesium-manganese alloy substrate has inherent rust-resistant properties. The naturally formed surface oxide layer prevents oxidation and corrosion, while offering resistance to acids and alkalis. Coated panels can form a self-healing protective film in harsh environments, making them suitable for humid climates. The design service life is over 50 years, with a coating warranty of 15–20 years.
The following parameters are based on standard production and relevant standards. Customization is available to meet specific project requirements.
| Performance Indicator | Parameter/Specification | Notes / Standard Basis |
|---|---|---|
| Substrate Grade | AA3004 (AlMg1Mn1) | Mn 1.0%–1.5%, Mg 0.8%–1.3%, balance Aluminum |
| Common Thickness | 0.7 mm – 1.2 mm | |
| Common Profiles | YX65-300/330/400/430/500, YX28-205-820 | Fan-shaped, tapered, and curved panels customizable |
| Density | 2.73 g/cm³ | Approx. 1/3 that of steel |
| Tensile Strength | 240 – 285 MPa | AA3004 H36/H46 temper |
| Yield Strength | ≥190 MPa | |
| Elongation | ≥3% | |
| Design Service Life | >50 years | |
| Material Standard Reference | GB/T 3880 series for aluminum alloy sheets | Verify with specific product certificate |
1. Flexible Shaping for Complex Designs. The panels can be processed into irregular shapes such as fan-shaped, tapered, convex and concave curved, and spherical panels. This supports the personalized design requirements of modern architecture for curved surfaces and arched roofs.
2. Lightweight with High Tensile Strength. With a density about one-third that of steel and a tensile strength above 240 MPa, the panels meet the requirements for large-span roofing, including spans exceeding 18 meters.
3. Corrosion Resistance and Long Service Life. The alloy naturally forms a protective oxide layer. The system is designed for a service life of over 50 years, with a coating warranty of 15–20 years.
4. Reliable Waterproofing via Modular Interlocking. The modular interlocking seam connection process ensures tight panel joints and reliable drainage and waterproofing performance.
5. Recyclable Material. The aluminum alloy material is fully recyclable, which supports green building objectives.
For curved or spherical roofs: Work with the manufacturer early in the design phase to confirm the achievable curvature radius for the selected profile and thickness. Fan-shaped and tapered panels require accurate shop drawings.
For long-span applications: Verify the panel span capability against the required loads. The Zhangzhou Grain Depot project used 1.2 mm thick panels over an 18-meter span, but each project should be calculated based on local wind and snow loads.
For coastal or high-humidity environments: Select PVDF fluorocarbon coating for improved weather resistance. Confirm that the substrate grade and coating system are compatible with the expected exposure conditions.
During installation: Panels are typically prefabricated into units in the factory and hoisted into position. Use the specified seaming method to ensure watertight joints. Follow the manufacturer's guidelines for handling, lifting, and fastening to avoid surface damage.
1. Curved, spherical, and irregularly shaped roofing systems for large public buildings such as stadiums and exhibition centers.
2. Complex-shaped roofing and facade systems for airport terminals and high-speed railway stations.
3. Long-span arched roof structures, such as warehousing facilities and agricultural greenhouses.
4. Roofing systems for landmark buildings with unique architectural design requirements.
Standard standing seam panels are typically straight and installed on flat or gently sloped roofs. Arched panels undergo additional forming to create curved profiles that follow convex, concave, or spherical roof geometries. Both systems use similar interlocking seam technology, but arched panels are specifically engineered for non-standard roof shapes.
The minimum curvature radius depends on the panel profile, material thickness, and alloy temper. This should be confirmed with the manufacturer during the design phase. Providing roof geometry drawings early can help determine whether the selected panel can achieve the required curvature without compromising structural performance.
Yes. The aluminum-magnesium-manganese alloy has natural corrosion resistance, and PVDF fluorocarbon coating further improves weather resistance. This makes the panels suitable for coastal and high-humidity environments. The design service life is over 50 years under normal conditions.
Fan-shaped and tapered panels are produced using specialized forming equipment and custom tooling. They are typically fabricated based on shop drawings derived from the roof geometry. Each panel is individually formed to match its specific position on the curved surface, ensuring proper fit and watertight seaming.
Please provide the roof geometry drawings (including curvature radius), panel profile, thickness, coating type, quantity, and project location. If fan-shaped or tapered panels are required, include the detailed layout drawings. This helps our team prepare an accurate quotation and production plan.
Tianjin SENBO Building Materials Technology Co., Ltd. is a manufacturer of Al-Mg-Mn arched roofing panels, standing seam roofing panels, color-coated steel downpipes, and other metal envelope products. Our production base is located in Jinghai Economic Development Zone, Tianjin, China, equipped with automated production lines and a four-stage quality inspection process. For more information about our factory, certifications, testing capabilities, and project references, please visit our About Us page or contact our engineering team.
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