We manufacture high-performance pre-coated steel coil rolls designed to deliver superior UV resistance, long-term corrosion resistance, and excellent formability for demanding architectural roofing applications.
| Specification | Technical Parameters |
| Product Name | Prepainted GI / PPGI / PPGL Colour Coated Coil (For Roofing Sheet) |
| Global Standards | AISI, ASTM, DIN, JIS, GB, SUS, EN |
| Material Grades | DX51D, DX52D, DX53D, S220GD, S250GD, S350GD, SGCC |
| Thickness Range | 0.2 mm - 6.0 mm (Or customised for heavy-duty roofing) |
| Width | 600 mm - 1500 mm (Or customized for specific roll-forming machines) |
| Spangle Options | Regular spangle, minimal spangle, zero spangle, big spangle |
| Surface Treatment | Clean, blasting, and custom painting (PE/PVDF/SMP) per requirement |
Our roofing coils are built upon robust galvanised (GI) and galvalume (GL) base metals. We rigorously test the tensile strength to ensure the coils can withstand complex roll-forming and corrugation processes without micro-cracking.
| Steel Grade | C% ≤ | Si% ≤ | Mn% ≤ | P% ≤ | S% ≤ | Tensile Strength (MPa) |
| SGCC / DX51D+Z | 0.07 | 0.03 | 0.50 | 0.025 | 0.025 | 270 - 500 |
| DX52D+Z | 0.06 | 0.03 | 0.45 | 0.025 | 0.025 | 270 - 420 |
| S250GD+Z | 0.17 | 0.30 | 1.00 | 0.035 | 0.300 | 330 - 470 |
| S350GD+Z | 0.20 | 0.55 | 1.60 | 0.035 | 0.300 | 420 - 560 |
We operate a complete industrial supply chain dedicated to producing premium architectural steel. Our in-house systematic facilities include:
Substrate Preparation: Advanced pickling and precision cold rolling.
Hot-Dip Galvanising & Galvalume: Applying thick, uniform zinc or aluminium-zinc alloy layers for ultimate core rust protection.
Continuous Colour Coating: High-adhesion automated painting lines ensuring uniform, weather-resistant micron-level coatings specifically formulated for outdoor roofing exposure.
While engineered primarily for heavy-duty roofing, the exceptional durability of our PPGI/PPGL coils makes them the standard material for:
Construction Industry: Commercial corrugated roofing sheets, structural wall cladding, and insulated sandwich panels.
Vehicle & Shipbuilding: Trailer siding, marine interior bulkheads, and heavy equipment enclosures.
Electrical & Furniture: Housings for heavy industrial appliances and commercial modular storage units.
As a direct, systematic solutions provider, we facilitate scalable metal supply chains for roll-forming factories, roofing contractors, and building-material wholesalers worldwide. Please submit your exact required material grade (e.g., DX51D PPGL), dimensions (Thickness × Width), required colour/surface coating type, and total metric tonnage to receive an official factory-direct price and MOQ details.
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