Galvalume Steel Coil
Galvalume steel coil combines the corrosion resistance of aluminum with the sacrificial protection of zinc, using a 55% aluminum, 43.4% zinc and 1.6% silicon coating applied at 600°C to a cold-rolled steel substrate. This dual protection extends service life in harsh environments, making it suitable for roofing, cladding, and industrial components where long-term durability is critical. Jialu stocks galvalume coil ac
- 55% aluminum, 43.4% zinc, 1.6% silicon coating provides both barrier and sacrificial protection against corrosion
- Coating applied at 600°C ensures strong adhesion and uniformity across the coil surface
- Available in ASTM-A653, JIS G3302, EN10147 and other international standards on one stock list
- Multiple hardness grades (soft, medium, full hard) allow selection based on forming and structural needs
Mill certificates issued against the ordered grade and standard. Third-party inspection available on request.
What This Material Is For
Galvalume steel coil combines the corrosion resistance of aluminum with the sacrificial protection of zinc, using a 55% aluminum, 43.4% zinc and 1.6% silicon coating applied at 600°C to a cold-rolled steel substrate. This dual protection extends service life in harsh environments, making it suitable for roofing, cladding, and industrial components where long-term durability is critical. Jialu stocks galvalume coil across multiple standards and mechanical grades, so a project requiring ASTM-A653, JIS G3302 and EN10147 compliance does not need to be split across different mills or suppliers. Coils are available in standard thickness, width and hardness ranges, with customization options for coating weight and packaging.
Why Buyers Choose It
- 55% aluminum, 43.4% zinc, 1.6% silicon coating provides both barrier and sacrificial protection against corrosion
- Coating applied at 600°C ensures strong adhesion and uniformity across the coil surface
- Available in ASTM-A653, JIS G3302, EN10147 and other international standards on one stock list
- Multiple hardness grades (soft, medium, full hard) allow selection based on forming and structural needs
- Customizable coating weight (AZ150G/m² or higher) to match environmental exposure and service life
- One supplier for coil, plate and sheet across multiple industries reduces sourcing complexity
Where It Is Used
- Roofing and wall cladding for industrial buildings in coastal or high-humidity environments
- Automotive underbody panels and trim requiring long-term corrosion resistance
- Appliance enclosures and kitchenware exposed to moisture and cleaning agents
- Cold storage and food processing equipment in agriculture and fisheries
- Commercial building facades and canopies in regions with high UV exposure and salt spray
- Prefabricated structures requiring formable, durable sheet metal with consistent coating
Who It Is For
- Building envelope fabricators sourcing corrosion-resistant roofing and cladding materials
- Automotive suppliers needing durable, formable steel for underbody and trim components
- Appliance manufacturers requiring washable, rust-resistant sheet for cabinets and panels
- Industrial equipment builders for cold storage units, transport containers and processing tools
- Export-focused fabricators who need one supplier for multiple standards and grades
Problems It Solves
- Splitting coil sourcing across multiple mills due to mismatched standards (e.g., ASTM, JIS, EN)
- Inconsistent coating performance when buying from suppliers without controlled coating temperature
- Late delivery or grade substitution when a single mill cannot supply a specific hardness or coating weight
- Lack of customization options for coating weight or packaging in standard stock coils
- Multiple inspection dates and shipment schedules when sourcing from separate steel, coating and finishing suppliers
Technical Features
- Coating composition: 55% aluminum, 43.4% zinc, 1.6% silicon applied at 600°C
- Coating weight: AZ150G/m² as standard, with customization available
- Material grades: G250, G450, G550, and others based on yield strength
- Thickness range: 0.12 to 6.0 mm, suitable for light to heavy-duty applications
- Width range: 600 to 1500 mm, covering most roll-forming and fabrication needs
- Coil inside diameter: 508 mm or 610 mm, standard for most processing equipment
- Hardness options: Soft (HRB60), medium (HRB60–85), full hard (HRB85–95)
- Coating uniformity and adhesion verified through process control at coating line
Grades Standards And Size Range
Values below come from the published product data. Anything not listed is confirmed per enquiry.
| Standards | ASTM-A653, JIS G3302, EN10147, etc. |
|---|---|
| Material Grades | G250, G450, G550, etc. |
| Aluminum-Zinc Coating | AZ150G/m², or customized |
| Thickness Range | 0.12 ~ 6.0 mm |
| Width Range | 600 - 1500 mm |
| Coil Inside Diameter | 508 / 610 mm |
| Coil Weight | 3 - 5 tons |
| Hardness Grades | Soft (HRB60), medium (HRB60-85), full hard (HRB85-95) |
Materials
- Cold-rolled steel substrate with high formability and consistent thickness
- 55% aluminum, 43.4% zinc, 1.6% silicon coating for superior corrosion resistance
- G250, G450, G550 grades offering increasing yield strength for structural and load-bearing applications
- Coating designed for long-term performance in humid, salty and industrial environments
Manufacturing Route
Quality Control
- Chemical composition and mechanical properties tested against ordered grade
- Coating weight and thickness measured using X-ray fluorescence or magnetic induction
- Surface inspection for defects, streaks, or coating irregularities
- In-house testing capability supports routine checks; third-party inspection available on request
- Mill certificates issued per purchase order, referencing standard and grade
Customisation Options
- Coating weight customizable beyond AZ150G/m² upon request
- Hardness grade selected at order stage based on forming or structural needs
- Packaging adjusted to customer requirements: waterproof paper + plastic film + iron packing + bundling
- Coil dimensions (width, thickness, inside diameter) specified at order stage
- OEM service accepted for branding and labeling
How It Compares With The Alternatives
| Galvanized steel coil (Zn-only) | Galvalume offers longer corrosion life in outdoor and humid environments due to aluminum’s oxide layer, especially in coastal or industrial zones |
|---|---|
| Aluminum-coated steel (Al-only) | Galvalume provides better sacrificial protection than pure aluminum, which lacks zinc’s ability to protect scratches and cut edges |
| Pre-painted steel coil | Galvalume is the base material for pre-painting; it offers better adhesion and durability than painting directly on galvanized steel, especially in high-temperature or high-moisture settings |
Buying Guide
- Start by confirming the required standard (ASTM, JIS, EN) and grade (G250, G450, etc.) for the application
- Specify coating weight (AZ150G/m² or higher) based on expected exposure duration and environment
- Select hardness grade (soft, medium, full hard) based on forming method and structural function
- Provide coil dimensions (thickness, width, inside diameter) to ensure compatibility with processing equipment
- Request third-party inspection at order stage to align with project schedule and compliance requirements
Questions About Galvalume Steel Coil
What standards does your galvalume coil meet?
ASTM-A653, JIS G3302, EN10147, and others as per customer specification.
Can you supply custom coating weights?
Yes. AZ150G/m² is standard, but higher coating weights are available upon request.
What hardness grades are available?
Soft (HRB60), medium (HRB60–85), and full hard (HRB85–95) are all available.
What is the thickness and width range?
Thickness: 0.12 to 6.0 mm. Width: 600 to 1500 mm.
Do you accept OEM orders?
Yes. OEM service is accepted for branding, labeling, and packaging.
Can third-party inspection be arranged?
Yes. Third-party inspection is available on request and can be scheduled at order stage.
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