English 
简体中文 
CN
| Property | Parameter | Description |
|---|---|---|
| Product Name | Prepainted Steel Coil for Roofing | Color-coated galvanized steel coil for roofing applications |
| Base Material | Hot-Dip Galvanized Steel (SGCC, DX51D, G550) | Multiple substrate grades available |
| Standard Compliance | ASTM A755, EN 10169, JIS G3312, AS 2728 | Meets major international standards |
| Manufacturing Process | Continuous Coil Coating (Roller Coating) | Two-coat two-bake or three-coat three-bake system |
| Zinc Coating Weight | Z100 - Z275 (100-275 g/m²) | Zinc layer for base corrosion protection |
| Total Coil Thickness | 0.12 - 1.2 mm | Including base metal and coating layers |
| Width Range | 600 - 1250 mm | Standard and custom widths available |
| Coil Inner Diameter | 508 mm / 610 mm | Standard coil eye dimensions |
| Coil Weight | 3 - 8 tons | Typical coil weight range |
| Top Coat Thickness | 15 - 25 μm | Front surface paint layer |
| Back Coat Thickness | 5 - 15 μm | Reverse side protective coating |
| Paint Type | PE, SMP, HDP, PVDF | Polyester, Silicon Modified Polyester, High Durability Polyester, Polyvinylidene Fluoride |
| Pencil Hardness | ≥2H (PE/SMP), ≥3H (HDP/PVDF) | Surface hardness per ASTM D3363 |
| Gloss Level (60°) | 20-80% adjustable | High gloss, semi-gloss, or matte finish options |
| Color Options | RAL color chart, custom colors | Wide range including RAL 5015, 3011, 9002, 1015, etc. |
| Tensile Strength | 270 - 550 MPa | Varies by substrate grade (G300-G550) |
| Yield Strength | 205 - 550 MPa | Minimum yield strength per substrate grade |
| Application | Roofing sheets, wall cladding, corrugated panels | Residential and industrial building envelope systems |
| Certification | ISO 9001, EN 10204 3.1, SGS, BV | Quality and inspection certifications provided |
| MOQ | 5 tons | Minimum order quantity per color per specification |
Acceptable PPGI Quality — Color Deviation on One Coil Resolved
Ordered 28 tons of PE prepainted coil, 0.38mm thickness, 1,050mm width, Z120, RAL 6005 moss green for a school roofing contract in Manchester. Seven of the eight coils matched the RAL reference within ΔE 1.4. One coil measured ΔE 2.1, which was outside the agreed 1.5 tolerance. Raised the issue with documentation and photos — the supplier responded within 24 hours, confirmed the deviation from their own retained sample, and arranged a replacement coil that arrived within 18 days. The replacement coil measured ΔE 1.1. MTC for all coils was complete and accurate. The resolution process was handled professionally, but the initial deviation did cause a two-week delay on our installation schedule. Would consider ordering again given how the issue was managed.
Ordered 28 tons of PE prepainted coil, 0.38mm thickness, 1,050mm width, Z120, RAL 6005 moss green for a school roofing contract in Manchester. Seven of the eight coils matched the RAL reference within ΔE 1.4. One coil measured ΔE 2.1, which was outside the agreed 1.5 tolerance. Raised the issue with documentation and photos — the supplier responded within 24 hours, confirmed the deviation from their own retained sample, and arranged a replacement coil that arrived within 18 days. The replacement coil measured ΔE 1.1. MTC for all coils was complete and accurate. The resolution process was handled professionally, but the initial deviation did cause a two-week delay on our installation schedule. Would consider ordering again given how the issue was managed.
