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Galvalume Color-Coated Steel Coil
Product Overview
When choosing materials for roofing, cladding, or fabrication, you need a solution that balances longevity, aesthetics, and cost-efficiency. Our Color Coated Galvalume Steel Coil is engineered to meet the rigorous demands of modern construction and manufacturing. Combining the superior corrosion resistance of an aluminum-zinc alloy substrate with advanced paint technologies, this product delivers exceptional performance in diverse environments, ensuring your projects stand the test of time while maintaining visual appeal.
Quick Specification Table (Typical Options)
| Item | Typical Range / Options | Buyer Notes |
| Base metal | Steel coil substrate with Al‑Zn (galvalume) coating (commonly 55% Al / 43.4% Zn / 1.6% Si) | Galvalume offers different protection mechanism vs GI (barrier + sacrificial at cut edges) |
| Coating mass (Al‑Zn) | AZ150 – AZ600 g/m² (common AZ150, AZ185, AZ275) | AZ number is total g/m² both sides; specify based on exposure—higher for coastal/industrial areas |
| Substrate thickness | 0.12 mm – 2.0 mm (common: 0.3–1.2 mm) | Choose based on forming, structural and cladding needs |
| Paint system (coil coating) | Primer + topcoat; resins: polyester (PE), siliconized polyester (SMP), PVDF (PVF2), PVDF hybrids | PVDF for best long‑term exterior performance; polyester/SMP for cost‑sensitive applications |
| Total paint thickness | 10 – 35 μm (typical 15–25 μm) | Specify primer/topcoat split if required; thicker films improve weatherability |
| Color & finish | RAL/Custom colors; gloss: matt, semi‑gloss, high gloss | Specify ΔE tolerance for color matching and gloss units (GU) |
| Coil width | 600 mm – 1,500 mm (typical: 914, 1000, 1219 mm) | Confirm slit tolerance and edge condition (sheared, oiled) |
| Surface treatment | Conversion coating / passivation (chromate or chromate‑free), oiling | Chromate‑free pretreatment often requested for environmental compliance |
Color & Finish Options
| Option | Description |
| Standard Colors | RAL color number series (over 200 colors available) . |
| Custom Colors | Match to provided samples or Pantone codes. |
| Gloss Level | Glossy (60–80%), Semi-gloss (30–50%), Matte (10–20%) |
| Surface Texture | Smooth, embossed (leather grain, wood grain, stucco), printed patterns. |
| Special Effects | Metallic, pearlescent, anti-fingerprint, self-cleaning |
Typical Applications (buyer‑centered)
Roofing & cladding: long‑life roofs, standing seam panels, corrugated sheets and wall cladding.
Architectural façades & curtain walls: where color stability and surface uniformity matter.
HVAC systems & ducting: coated galvalume resists corrosion and offers smooth finish for air systems.
Agricultural & industrial buildings: roof and wall panels with improved longevity.
Pre‑fabricated buildings & container components: where thermal reflectivity and durability are valued.
Signage, gutters, flashings and trim: small components benefiting from good cut‑edge protection and paint adhesion.
FAQ — Frequently Asked Questions (for International Buyers)
Q: What is the difference between PPGL (prepainted galvalume) and PPGI (prepainted galvanized)?
A: PPGL uses an aluminium‑zinc (Al‑Zn) alloy coating (galvalume), while PPGI uses a pure zinc coating. Galvalume provides a barrier protection from the aluminium layer and sacrificial protection at cut edges; it often offers better corrosion resistance and heat reflectivity in many environments. PPGI (zinc) offers more sacrificial protection in some scenarios and can be less expensive—choose based on exposure and performance priorities.
Q: How do I specify coating mass for galvalume?
A: Specify the AZ value (e.g., AZ150, AZ185, AZ275) representing total g/m² of Al‑Zn alloy on both sides. Select AZ according to environment: higher AZ values for coastal/industrial exposure. Clarify whether AZ is per side or total in the PO.
Q: Which paint system is best for long‑term exterior exposure?
A: PVDF (70% PVDF) coatings provide the best color retention and weather resistance for long‑term exterior applications. For moderate climates or lower budgets, SMP or polyester systems may be acceptable.
Q: Can PPGL be roll‑formed and deep‑drawn?
A: Yes. PPGL is commonly roll‑formed and can be deep‑drawn, but forming performance depends on substrate thickness, paint system and paint film thickness. Request forming tests (T‑bend, mandrel) and sample prototyping for critical profiles.
Q: How should I store PPGL coils to avoid damage?
A: Store coils indoors in a dry, ventilated area on cradles or pallets. Avoid condensation, do not stack without separators, and protect from direct contact with water or chemicals. Use VCI and desiccants for long voyages.
Q: How does galvalume behave at cut edges and when pieces are fabricated?
A: Galvalume provides good cut‑edge protection thanks to the aluminium barrier; however, in extremely corrosive environments you may want edge sealing or protective detailing. For welded joints or hot forming, follow supplier recommendations regarding welding fumes and post‑treatments.
Q: Is PPGL environmentally friendly and compliant?
A: Suppliers can provide RoHS/REACH declarations and paint TDS showing VOC content. Chromate‑free pretreatment options are available for more environmentally sensitive projects—specify these if required.
Contact our sales team today for a quotation or to discuss your project requirements. We are committed to providing high-quality PPGL that meet your exact specifications and delivery deadlines.
Your trusted partner in Color Coated Galvalume Steel solutions.For further technical information, pricing, or customization, please contact our sales team:
Tel/WA/Wechat: +86 13225105678
Email: sales01@duohessplate.com
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