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Color-Coated Corrugated Roofing Sheets - Mill Direct
China
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of Color-Coated Corrugated Roofing Sheets
| Property | Parameter | Description |
|---|---|---|
| Product Name | Color-Coated Corrugated Roofing Sheets | Pre-painted profiled steel sheets for roofing and cladding applications |
| Material Grade | S250GD, S280GD, S320GD, S350GD (EN); CGCC, CGCD (JIS G3312); Q235, Q345 (GB) | Hot-dip galvanized or galvalume base metal with organic coating; equivalent to ASTM A755M |
| Standard Compliance | EN 10169, JIS G3312, GB/T 12754, ASTM A755M | Meets international standards for continuously organic-coated flat-rolled steel products |
| Chemical Composition | C ≤ 0.12%, Mn ≤ 0.60%, P ≤ 0.030%, S ≤ 0.025%, Si ≤ 0.50% | Base steel chemistry per EN 10346 / GB/T 2518; zinc coating: Zn ≥ 99.7% |
| Tensile Strength | 320–500 MPa (S280GD); 360–510 MPa (S320GD) | Per EN 10169 / GB/T 12754; higher grades available upon request |
| Yield Strength | ≥ 250 MPa (S250GD); ≥ 280 MPa (S280GD); ≥ 320 MPa (S320GD) | Minimum yield strength ensuring structural rigidity under wind and snow loads |
| Elongation | ≥ 16% (A80mm, S250GD–S320GD) | Per EN 10169; ensures formability during roll-forming and installation |
| Base Metal Thickness | 0.30–1.20 mm (BMT); total coated thickness 0.35–1.25 mm | Common roofing gauges: 0.40 mm, 0.47 mm, 0.50 mm, 0.60 mm BMT |
| Sheet Width | Effective width: 760–1050 mm; coil width up to 1250 mm | Effective coverage width depends on corrugation profile (e.g., 762 mm, 900 mm, 1000 mm) |
| Sheet Length | 1000–12000 mm (custom cut-to-length) | Standard lengths: 1.8 m, 2.4 m, 3.0 m, 6.0 m; custom lengths available |
| Corrugation Profile | Wave height: 18–36 mm; pitch: 76–130 mm | Typical profiles: 762 corrugated, IBR, Trimdek; custom profiles on request |
| Coating System | Top coat: PE (polyester) 15–25 μm; PVDF 25 μm; SMP 20 μm; primer: 5–7 μm; back coat: 7–15 μm | Zinc/galvalume base + chromate passivation + primer + top coat; total DFT per EN 13523 |
| Surface Finish | RAL color chart (3000+ colors); matte, gloss, textured, embossed options | Gloss level: 30–85 GU (60° geometry); UV-resistant and weather-resistant finish |
| Application | Industrial warehouses, commercial buildings, residential roofing, agricultural structures, wall cladding | Suitable for tropical, coastal, and high-humidity environments depending on coating grade |
| Certification | ISO 9001:2015, CE Marking (EN 14782), SGS, BV, TÜV | Third-party inspection and mill test certificates (MTC) available per EN 10204 3.1 |
| Packaging | Bundles of 10–50 sheets; wrapped in waterproof kraft paper + steel strapping; palletized | Export seaworthy packaging; fumigation certificate available for wooden pallets |
| MOQ | 5 metric tons per color/profile | Mixed container orders accepted; standard 20' FCL ≈ 18–22 MT depending on thickness |
Color-Coated Corrugated Roofing Sheets - Mill Direct
Color-coated corrugated roofing sheets represent one of the most versatile and cost-effective roofing solutions available in today's construction market. Sourced directly from the mill, these panels combine structural rigidity with aesthetic flexibility, making them an ideal choice for industrial warehouses, agricultural buildings, commercial complexes, and residential structures alike. Engineered with a precision-formed corrugated profile, each sheet delivers enhanced load-bearing capacity and superior weather resistance. The color coating system — typically comprising a primer layer and a polyester or PVDF topcoat — provides outstanding anti-corrosion properties while maintaining vibrant, fade-resistant finishes for decades. Whether you are developing a large-scale roofing project or sourcing materials for a regional distributor network, mill-direct supply ensures tighter quality control, shorter lead times, and significantly more competitive pricing compared to secondary market channels. Our color-coated corrugated roofing panels meet internationally recognized standards including ASTM, EN, and GB, giving buyers confidence in every order regardless of project scale or destination market.
What is Color-Coated Corrugated Roofing Sheets?
Color-coated corrugated roofing sheets are steel or aluminum-based panels that have undergone a continuous roll-forming process to create a repeating wave or corrugated profile, followed by a multi-layer organic coating applied through a coil coating line. The base metal — most commonly galvanized steel (Z275 g/m² zinc coating) or Galvalume (AZ150) — provides the structural foundation, while the color coating enhances durability, corrosion resistance, and visual appeal across a broad range of architectural applications.
Color-Coated Corrugated Roofing Sheets Manufacturing Process
Production begins with cold-rolled or hot-dip galvanized steel coils fed into a continuous coil coating line, where surface pre-treatment (degreasing, chromating, or passivation) ensures optimal paint adhesion. A primer coat of 5–8 µm is applied, cured at approximately 230°C, followed by a topcoat of 15–25 µm polyester or PVDF resin. The coated coil is then roll-formed through precision dies to achieve the corrugated profile, cut to specified lengths, and inspected for dimensional accuracy and coating uniformity before packaging.
Color-Coated Corrugated Roofing Sheets Technical Specifications
Standard offerings cover base metal thickness from 0.3 mm to 1.2 mm, with sheet widths of 750 mm to 1,250 mm and custom cut lengths up to 12,000 mm. Yield strength reaches a minimum of 280 MPa (Grade S280GD per EN 10346), while tensile strength typically ranges from 360 MPa to 420 MPa. Coating dry film thickness (DFT) is maintained at 20–25 µm for the topcoat, with a pencil hardness of ≥ 2H and T-bend flexibility of ≤ 2T. RAL and custom color matching is available with a gloss level range of 30–70 GU (60° geometry). Salt spray resistance exceeds 1,000 hours per ASTM B117, ensuring long-term performance in coastal and industrial environments.
Get a Competitive Quote for Color-Coated Corrugated Roofing Sheets
As a mill-direct supplier, we offer color-coated corrugated roofing sheets at factory-level rates with full traceability documentation. Whether your requirement is a trial container or a full-vessel bulk order, our team is ready to deliver tailored solutions with rapid turnaround. Reach out now to receive a detailed quotation aligned to your project specifications.
- 24/7 customer support available
- Free samples for quality evaluation
- Competitive pricing for bulk orders
- Professional technical consultation
Contact us today to get your free quote within 24 hours!
