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| Property | Parameter | Description |
|---|---|---|
| Product Name | Construction Exterior Color Steel Sheet | Pre-painted galvanized/galvalume steel sheet for exterior building applications |
| Material Grade | SGCC / DX51D / S280GD | International equivalents: ASTM A653 CS / EN 10346 DX51D+Z / JIS G3302 SGCC |
| Standard Compliance | ASTM A755 / EN 10169 / JIS G3312 / GB/T 12754 | Covers pre-painted metallic coated steel sheet for exterior construction use |
| Base Metal Composition (C) | ≤ 0.12% | Low carbon content ensures good formability and coating adhesion |
| Base Metal Composition (Mn) | ≤ 0.60% | Manganese for structural strength balance |
| Base Metal Composition (P) | ≤ 0.10% | Controlled phosphorus for improved corrosion resistance |
| Base Metal Composition (S) | ≤ 0.045% | Low sulfur for enhanced surface quality |
| Tensile Strength | 270–560 MPa | Per EN 10346 / ASTM A653; varies by grade (e.g., S280GD: ≥ 360 MPa) |
| Yield Strength | 220–420 MPa | Minimum yield strength per EN 10169; S280GD: ≥ 280 MPa |
| Elongation | ≥ 16–22% | A80 elongation per EN 10346; ensures bendability for roofing and cladding profiles |
| Thickness Range | 0.20–1.50 mm (base metal) | Total thickness including coating; width: 600–1,250 mm; coil length: per order |
| Zinc / Zinc-Aluminum Coating | Z60–Z275 / AZ50–AZ150 | Hot-dip galvanized (Z) or Galvalume (AZ) coating weight per EN 10346 / ASTM A792 |
| Paint Coating System | PVDF / SMP / HDP / Polyester | Top coat 20–35 μm; primer 5–7 μm; back coat 7–12 μm; PVDF recommended for exterior durability |
| Surface Finish | Smooth / Embossed / Matte / Glossy | Gloss level 10–80 GU (60° angle); RAL / custom color available; UV-resistant topcoat |
| Application | Roofing, Wall Cladding, Facade Panels, Canopies | Widely used in industrial buildings, warehouses, commercial and residential construction |
| Certification | ISO 9001 / CE Marking / SGS / BV | Third-party inspection available; RoHS compliant; fire resistance class per EN 13501 |
| Packaging | Steel-strapped coils with waterproof paper and plastic film | Eye-to-sky or eye-to-wall; inner diameter 508/610 mm; coil weight ≤ 10 MT |
| MOQ | 25 MT per color/specification | Mixed container accepted; lead time 15–25 days after order confirmation |
Color Batch Variance on First Order — Issue Fully Resolved
Our initial 35-ton order of 0.55 mm PE-coated sheet in RAL 3009 showed a slight gloss variation between two coil batches — roughly 6 GU difference at 60° geometry, noticeable when panels were installed side by side on a retail facade. We flagged this immediately. The supplier investigated within 48 hours, confirmed a calibration deviation during that production run, and shipped replacement coils at no additional cost within two weeks. Subsequent batches have been consistent. Appreciate the transparent resolution. Confidence restored for future orders.
Our initial 35-ton order of 0.55 mm PE-coated sheet in RAL 3009 showed a slight gloss variation between two coil batches — roughly 6 GU difference at 60° geometry, noticeable when panels were installed side by side on a retail facade. We flagged this immediately. The supplier investigated within 48 hours, confirmed a calibration deviation during that production run, and shipped replacement coils at no additional cost within two weeks. Subsequent batches have been consistent. Appreciate the transparent resolution. Confidence restored for future orders.
