55% Galvalume Steel Coil
55% Galvalume Steel Coil
55% Al-Zn Alloy Coated Steel Coil for Roofing & Industrial Sheets
Strong Weather Resistance
Premium Al-Zn coating protects your roofing projects from long-term outdoor rust.
Heat Reflectivity
Reflects solar heat to lower indoor temperatures for energy-saving buildings.
Flexible Surface Options
Choose chromated, oiled, or AFP coating to perfectly match your processing needs.
Reliable Formability
Uniform steel quality ensures smooth roll-forming into standard corrugated sheets.
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | 55% Galvalume Steel Coil / Aluzinc Steel Coil |
| Standard Compliance | ASTM A792, EN 10346, JIS G3321, GB/T 14978 |
| Steel Grade | SGLCC, SGLCD, DX51D+AZ, G550 (Full Hard) |
| Chemical Composition | 55% Aluminum, 43.4% Zinc, 1.6% Silicon |
| AZ Coating Mass | AZ30 to AZ150 g/m² (Double-sided) |
| Thickness Range | 0.12 – 2.0 mm |
| Width Range | 600 – 1250 mm |
| Surface Treatment | Anti-fingerprint (Transparent/Blue/Green), Chromated, Oiled, Dry |
| Spangle Type | Regular Spangle / Mini Spangle / Zero Spangle |
| Coil Weight & ID | 3 – 8 Metric Tons per coil; ID: 508 / 610 mm |
| Primary Applications | Roofing sheets, PPGL substrate, industrial wall cladding, home appliances, automotive parts |
Quality Control & Shipping Case
Buyer Concerns (FAQ）
Q1: GL vs GI: What is the main structural difference?
A: GL steel features a 55% Al-Zn alloy coating, which provides superior barrier protection and thermal reflectivity compared to pure zinc-coated GI steel.
Q2: What surface treatment options are available for 55% Galvalume Steel Coil?
A: We offer chromated, oiled, dry, and anti-fingerprint (AFP) resin coatings (transparent, blue, or green) based on your storage and processing requirements.
Q3: How does the Al-Zn coating perform during bending and roll forming?
A: Our GL steel offers excellent structural stability and uniform coating adhesion, making it suitable for standard roll-forming and press-forming operations.
Q4: What is your Minimum Order Quantity (MOQ)?
A: Standard MOQ is one 20ft container (~25 tons). You can mix 2–3 thicknesses or widths in one load.
