In North American standing seam metal roofing systems, the 3003 aluminum-manganese alloy is one of the most widely used substrates. The H24 temper—characterized by low springback and stable forming properties—is the preferred choice for high-speed roll-forming production lines. As a Canadian supplier, BCM Aluminum produces 3003 H24 aluminum coils for roofing in accordance with ASTM B209 standards. Available with a full range of weather-resistant coatings, these products serve commercial buildings, warehouses, and residential roofing projects across North America.
The 3003 aluminum alloy belongs to the aluminum-manganese (Al-Mn) series, known for its excellent natural resistance to atmospheric corrosion (with a manganese content of 1.0%–1.5%). The H24 temper is achieved through cold-rolling followed by a controlled low-temperature annealing process; this relieves internal rolling stresses while maintaining "half-hard" strength, resulting in approximately 20% less springback compared to the H14 temper.
Standard mechanical specifications include a tensile strength of 145–185 MPa, a yield strength of ≥125 MPa, and an elongation of ≥4% for thicknesses of 0.5 mm or greater. This strength profile provides the necessary structural integrity to withstand wind uplift and snow loads, while ensuring precise panel geometry and tight, secure seams during the roll-forming process.
Practical experience from North American roofing production lines demonstrates that H24-temper material exhibits minimal angular deviation after forming. The pass rate for standing-seam locking—a critical aspect of installation—consistently exceeds 99%, significantly reducing the need for on-site rework or the application of additional sealants.
The 3003 aluminum coil can withstand over 500 hours of neutral salt spray testing; when combined with a pre-applied coating system, its weather resistance is further extended, making it ideally suited for the climates found across North America’s interior and suburban regions. BCM utilizes a continuous coil-coating process—involving two coating applications and two baking cycles—with three tiers of top-coat options:
- Polyester (PE) coating: dry film thickness (DFT) ≥ 16 μm, adhesion rating of 0, T-bend ≤ 2T, and color retention of 5–8 years; suitable for light-duty warehousing and agricultural structures.
- High-Durability Polyester (HDP) coating: DFT of 20–25 μm, with outdoor color retention of 10–15 years; the standard choice for typical commercial roofing in North America.
- Fluorocarbon (PVDF) coating: containing ≥ 70% resin, with a DFT ≥ 25 μm. It withstands > 2,000 hours of neutral salt spray, meets AAMA 2605 standards, offers 25–30 years of outdoor color retention, and is designed for coastal areas or regions with high UV exposure.
The underside features a standard epoxy backer (≥ 8 μm) to isolate the roof from condensation and prevent oxidation or corrosion on the reverse side. Color consistency is strictly controlled, with a ΔE ≤ 1.0 across the same production batch. Custom color matching—including Kynar 500-based standards—is available, ensuring a uniform visual appearance even over large-scale installations.
For roofing applications, 3003 H24 aluminum coils are typically supplied in thicknesses ranging from 0.4 mm to 1.2 mm. For standing-seam roofing systems, the most frequently used thicknesses are 0.7 mm, 0.9 mm, and 1.0 mm. Widths can be customized to match the specific infeed requirements of the client’s roll-forming lines, ranging from 100 mm to 1,600 mm with a slitting tolerance of ±0.5 mm. Thickness tolerance is controlled within ±0.02 mm, and sheet flatness is maintained at ≤2 mm/m. The standard coil inner diameter is 508 mm, ensuring compatibility with mainstream roofing roll-forming equipment used in North America.
BCM offers both smooth and embossed finishes. The stucco-embossed aluminum coil provides soft, diffuse light reflection—helping to mitigate urban light pollution—while effectively concealing minor scratches that may occur during transport or installation. The smooth finish aluminum coil offers higher forming precision, making it ideal for projects that demand strict straightness and alignment.
BCM maintains a standing inventory of 3003-H24 aluminum coils for roofing, with standard specifications available for delivery within 7–15 days. Each shipment includes ASTM B209 material certification, coating test reports, and color-consistency records, with full traceability back to the specific furnace heat number. We offer value-added services such as precision slitting and protective surface film application. For roofing project quotes, please provide the thickness, coating type, color code, and procurement quantity; our technical team will respond with a proposal and quotation within 24 hours.
