Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of galvalume roofing coil in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Products Description
Galvalume Roofing Coil is a high-performance steel coil coated with a zinc-aluminum alloy, combining 55% aluminum, 43.5% zinc, and 1.5% silicon to provide superior corrosion resistance and long-term durability. Specifically designed for roofing and cladding applications, Galvalume steel offers excellent protection against harsh weather, UV exposure, and rust, making it ideal for industrial, commercial, and residential roofing projects.
Manufactured according to international standards such as ASTM A792, JIS G3321, EN10147, and GB/T 2518, our Galvalume Roofing Coils come in prepainted or bare finish, with customizable steel thickness, coil width, coil weight, and paint coating thickness. They are widely used in roofing, wall panels, gutters, solar panel backing, and industrial buildings.
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Products Description
What is Galvalume Roofing Coil?
Xi'an Dongmeng Group Co., Ltd.
Galvalume Roofing Coil is a premium, continuous steel coil coated with a unique metallic alloy composed of 55% Aluminum, 43.4% Zinc, and 1.6% Silicon. This advanced coating, often referred to as 55% Al-Zn, provides exceptional corrosion resistance and longevity – significantly outperforming traditional galvanized steel. Developed through a continuous hot-dip process, Galvalume coil forms the essential base material for manufacturing high-performance, durable metal roofing and cladding panels.
Why Choose Galvalume Roofing Coil?
Economic Value: While the initial cost may be slightly higher than galvanized steel, the vastly extended service life and reduced maintenance requirements offer a significantly lower lifecycle cost, providing excellent long-term value.
Aesthetic Versatility: Provides a clean, bright metallic base ideal for painting. Pre-painted Galvalume coils offer a vast array of colors and finishes (PVDF, SMP, Polyester) for architectural appeal, while retaining the superior corrosion protection of the Galvalume base.
High Temperature Performance: Maintains integrity at higher temperatures (up to approximately 315°C / 600°F) where standard galvanized coatings can deteriorate, making it suitable for specific industrial applications.
Primary Applications
Xi'an Dongmeng Group Co., Ltd.
Standing Seam Roofing Systems
Corrugated / Trapezoidal Roofing & Siding
Metal Roof Tiles and Shingles
Agricultural and Industrial Building Cladding
Rainwater Systems (Gutters, Downspouts)
HVAC Ductwork (specific grades)
Galvalume Roofing Coil Specifications
| Property | Specification |
|---|---|
| Base Material | Cold-Rolled Steel (CR) or Hot-Dipped Steel |
| Coating Type | Galvalume (Zn-Al Alloy) – Bare or Prepainted |
| Al-Zn Coating Thickness | 55% Al / 43.5% Zn / 1.5% Si |
| Base Steel Thickness | 0.15 – 1.2 mm |
| Width | 600 – 1250 mm (customizable) |
| Inner Diameter of Coil | 508 mm standard, 610 mm optional |
| Coil Weight | 3 – 8 tons per coil |
| Surface Finish | Smooth, Matte, Stucco Embossed |
| Standards | ASTM A792 / JIS G3321 / EN10147 / GB/T 2518 |
| Packaging | Plastic film wrap, waterproof paper, steel straps for export |
Chemical Composition (Typical %)
| Coating Composition | Content (%) |
|---|---|
| Aluminum (Al) | 55 |
| Zinc (Zn) | 43.5 |
| Silicon (Si) | 1.5 |
| Base Steel (Typical) | C (max) | Mn (max) | P (max) | S (max) |
|---|---|---|---|---|
| DC01 / Q195 | 0.12 | 0.50 | 0.04 | 0.04 |
| DC03 / Q235 | 0.22 | 1.40 | 0.05 | 0.05 |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| DC01 / Q195 | ≥195 | ≥315 | ≥33 |
| DC03 / Q235 | ≥235 | ≥375 | ≥26 |
International Standard Size Chart
| Base Steel Thickness (mm) | Al-Zn Coating Thickness (μm) | Width (mm) | Coil ID (mm) | Coil Weight (tons) | Approx. Length (m) |
|---|---|---|---|---|---|
| 0.15 – 0.30 | 55 – 150 g/m² | 600 – 1000 | 508 (20") | 3 – 5 | 150 – 500 |
| 0.30 – 0.50 | 100 – 180 g/m² | 600 – 1250 | 508 / 610 | 3 – 6 | 120 – 400 |
| 0.50 – 0.80 | 100 – 180 g/m² | 800 – 1250 | 508 / 610 | 4 – 7 | 100 – 350 |
| 0.80 – 1.20 | 100 – 180 g/m² | 1000 – 1250 | 508 / 610 | 5 – 8 | 80 – 300 |
Choosing the Right Galvalume Coil
Environment: Coastal or high-corrosion areas demand higher coating weights (AZ70, AZ100).
Profile & Application: Structural requirements dictate steel grade and thickness. Complex profiles need good formability (CQ/FQ).
Aesthetics: Pre-painted coils offer color and warranty options; bare Galvalume provides a bright metallic look.
Performance: Specify minimized/zero spangle for consistent painted appearance. Cr-free passivation is environmentally preferred.
Invest in Long-Term Performance
Galvalume Roofing Coil is the intelligent choice for architects, builders, and property owners seeking a roofing material that delivers exceptional durability, weather resistance, energy efficiency, and cost savings over the lifetime of the structure. Its proven track record makes it a cornerstone material for modern, sustainable metal roofing systems worldwide.
Ready to Specify or Order High-Quality Galvalume Roofing Coil? Contact us today for quotes, detailed technical data sheets, and expert advice tailored to your project requirements.
We supply high-quality Al-Zn coated steel coils, prepainted or bare, with custom specifications and factory-direct pricing for global buyers.
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
FAQ (Frequently Asked Questions)
Q1: What is the difference between Galvalume and galvanized steel coils?
A1: Galvalume steel is coated with a zinc-aluminum alloy (55% Al + 43.5% Zn), providing better corrosion and heat resistance than standard galvanized steel.
Q2: Can Galvalume roofing coils be prepainted?
A2: Yes, both bare and prepainted (PVDF, SMP, Polyester) options are available.
Q3: What is the standard coil ID?
A3: Standard 508 mm (20"), optional 610 mm for large exports.
Q4: What thicknesses are available?
A4: Base steel thickness ranges from 0.15 mm to 1.2 mm, with Al-Zn coating 55–180 g/m².
Q5: Are Galvalume coils suitable for coastal areas?
A5: Yes, Galvalume provides superior corrosion protection even in high-salinity environments.
Q6: Can I order custom widths and coil weights?
A6: Yes, widths from 600–1250 mm and coil weights from 3–8 tons can be customized.
Q7: How are coils packaged for export?
A7: Each coil is wrapped in plastic film, waterproof paper, and strapped with steel; pallets available on request.
Q8: What is the minimum order quantity (MOQ)?
A8: Typically 5 tons per specification, but smaller trial orders are accepted.
Q9: Can Galvalume coils be used for both industrial and residential roofing?
A9: Yes, Galvalume is widely used in industrial warehouses, factories, and residential buildings.
Q10: Do you provide inspection and certification?
A10: Yes, Mill Test Certificate (EN10204/3.1) and third-party inspection (SGS, BV, TUV) are available.
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