● HDP is a cost-effective and widely used coated coil, offering performance between standard polyester (PE) and PVDF. ● The High Weather Resistance Color Coated Sheet is a high-performance building material designed for harsh outdoor environments. Its surface is coated with special polyester or fluorocarbon coatings, providing exceptional UV resistance and weatherability. It effectively withstands sun exposure, acid rain, salt spray, and other corrosive elements, ensuring long-lasting color retention and delayed chalking or fading. With high strength and a long service life, it is widely used for roofs and walls in industrial plants, storage logistics facilities, and large public buildings, making it an ideal choice for superior durability and cost-effectiveness.
Substrate Type
Galvanized Steel (GI)
Galvalume Steel (GL/55%Al-Zn) - More common, better corrosion resistance.
Substrate Thickness
Conventional Range: 0.3mm ~ 1.2mm
Commonly used in construction: 0.4mm ~ 0.7mm
Coating Weight (Coating Mass)
Unit: g/m² (Total both sides)
Galvanized (GI): e.g., 60/60, 90/90, 100/100,150/150
Galvalume (GL): e.g.,50/50, 100/100,120/120,150/150
Commonly used for building envelope: AZ100 (100/100) or AZ150 (150/150)
Coating Structure
Two Coats Two Bakes (2C2B): Primer + Topcoat - The most standard structure.
Coating Thickness
Unit: μm, usually refers to the total thickness per side.
Conventional Requirement: ≥ 20μm (MBR: Minimum Both Sides)
Topcoat Thickness (Front Side): Typically 15μm ~ 20μm
Color & Surface Finish
Color: Customizable, but light colors (white, grey) have the best weatherability.
Gloss:
Low Gloss: 10° - 30° - Most common, better weatherability.
Medium Gloss: 40° - 60°
Coating Texture: Fine Texture, Orange Peel, Smooth
Weathering Resistance - Core Indicator
QUV Accelerated Weathering Test:
≥ 800 hours (Better than standard PE's 400-500 hrs)
No blistering/cracking/peeling after test, slight change in ΔE, and gloss loss.
Salt Spray Test:
≥ 500 hours without substrate corrosion.
Mechanical Properties
Pencil Hardness: ≥ HB (Usually can reach H)
T-Bend: 3T (Typical value)
Reverse Impact: ≥ 6J (Typical value)
Adhesion
Cross-Cut Test: Class 0 or 1 (Excellent)
| Category | Parameter | GI Conventional Value/Range | GL Conventional Value/Range | Notes |
| Substrate | Type | GI | GL | GL (Galvalume) more common |
| Substrate | Thickness | 0.4mm - 0.7mm | 0.4mm - 0.7mm | - |
| Substrate | Coating Weight | 90/90-75/75 | 50/50-75/75 | AZ100 & AZ150 are common choices |
| Coating | Resin System | High-durability Polyester (HDP) | High-durability Polyester (HDP) | Core identifier, cost-effective choice |
| Coating | Coating Thickness | ≥ 20μm (Front side 15-20μm) | ≥ 20μm (Front side 15-20μm) | - |
| Coating | Gloss | 10° - 40° (Matte) | 10° - 40° (Matte) | Low gloss has better weatherability |
| Coating | Color | Light colors recommended | Light colors recommended | - |
| Performance | Weatherability (QUV) | ≥ 800 hours | ≥ 800 hours | Key differentiator |
| Performance | Salt Spray | ≥ 500 hours | ≥ 500 hours | - |
| Performance | Pencil Hardness | ≥ HB (usually H) | ≥ HB (usually H) | - |
| Performance | T-Bend | ≤ 3T | ≤ 3T | - |
| Performance | Adhesion | Class 0 or 1 | Class 0 or 1 | - |
Reliable steel solutions for various industries, customized to your needs.
If you have any questions, inquiries, or concerns, our highly skilled and dedicated team of Aoguan professionals is always at your disposal, ready to offer prompt and reliable assistance and support.
aoguanthinsteel@agtst.com
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