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| Property | Parameter | Description |
|---|---|---|
| Product Name | Prepainted Steel Coil (PPGI/PPGL) | Color-coated galvanized or galvalume steel coil |
| Base Material | Cold Rolled / Hot-Dip Galvanized / Galvalume Steel | Multiple substrate options available |
| Standard Compliance | ASTM A755, EN 10169, JIS G3312, GB/T 12754 | Meets major international standards |
| Substrate Grade | SGCC, DX51D, S250GD, CS Type B | Common structural and forming grades |
| Zinc Coating Weight | 40-275 g/m² | Hot-dip galvanized zinc layer per ASTM A653 |
| Thickness Range | 0.12 - 1.2 mm | Total thickness including coating layers |
| Width Range | 600 - 1250 mm | Standard and custom widths available |
| Coil Weight | 3 - 8 tons | Typical coil weight per unit |
| Top Coat Thickness | 15 - 25 μm | Primary color/finish paint layer |
| Back Coat Thickness | 5 - 15 μm | Protective backing paint layer |
| Paint Type | PE, SMP, HDP, PVDF | Polyester, silicon modified polyester, high durability polyester, polyvinylidene fluoride |
| Color Options | RAL color chart, custom colors | Wide range per RAL/Pantone system |
| Pencil Hardness | ≥2H (PE) / ≥3H (PVDF) | Surface scratch resistance per ASTM D3363 |
| Gloss Level | 10-90% (60° angle) | Matte to high gloss finishes available |
| Tensile Strength | 270 - 550 MPa | Varies by substrate grade |
| Yield Strength | 205 - 380 MPa | Minimum yield strength per grade |
| Application | Roofing, wall cladding, sandwich panels, appliances | Construction and manufacturing industries |
| Certification | ISO 9001, EN 10204 3.1, SGS, BV | Quality and inspection certifications |
| Packaging | Eye-to-sky, waterproof paper, steel strip bundled | Seaworthy export packaging |
| MOQ | 5 tons | Minimum order quantity per color |
Acceptable Quality Prepainted Coil — Color Variance Issue Resolved
Ordered 35 tons of SMP prepainted coil, 0.55mm, 1,100mm width, RAL 8017 for industrial cladding panels. On inspection, two coils from the batch showed a visible color shift compared to the remaining eight — ΔE measured at approximately 2.1, outside the ≤1.5 tolerance spec. Raised the issue with the technical team immediately; they acknowledged the variance, provided a revised mill report, and arranged replacement coils within 18 days along with partial credit on the affected material. The replacement coils measured ΔE at 1.0. Mechanical properties and zinc coating weight on all coils were within spec throughout. Issue handling was professional, which is why we will consider reordering, but stricter batch QC before shipment would prevent this situation.
Ordered 35 tons of SMP prepainted coil, 0.55mm, 1,100mm width, RAL 8017 for industrial cladding panels. On inspection, two coils from the batch showed a visible color shift compared to the remaining eight — ΔE measured at approximately 2.1, outside the ≤1.5 tolerance spec. Raised the issue with the technical team immediately; they acknowledged the variance, provided a revised mill report, and arranged replacement coils within 18 days along with partial credit on the affected material. The replacement coils measured ΔE at 1.0. Mechanical properties and zinc coating weight on all coils were within spec throughout. Issue handling was professional, which is why we will consider reordering, but stricter batch QC before shipment would prevent this situation.
