Galvalume Color Steel Sheet - Mill Direct Manufacturer
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of Galvalume Color Steel Sheet
| Property | Parameter | Description |
|---|---|---|
| Product Name | Galvalume Color Steel Sheet | Pre-painted aluminum-zinc alloy coated steel sheet (PPGL/PPAZ) |
| Material Grade | AZ150 / AZ100 / AZ50 | Equivalent to ASTM A755M, JIS G3322 CGLCC/CGLCH, GB/T 14978 |
| Standard Compliance | ASTM A755M / EN 10169 / JIS G3322 / GB/T 14978 | International standards for prepainted Galvalume steel coils and sheets |
| Base Metal Chemical Composition | C ≤0.12%, Mn ≤0.60%, P ≤0.04%, S ≤0.045%, Si ≤0.50% | Low-carbon steel substrate with Al-Zn alloy coating (55% Al, 43.5% Zn, 1.5% Si) |
| Coating Composition | 55% Aluminum, 43.5% Zinc, 1.5% Silicon | Galvalume (AZ) coating provides superior corrosion and heat resistance |
| Tensile Strength | ≥270 MPa (Commercial Grade) / ≥340 MPa (Structural Grade) | Per ASTM A755M / JIS G3322; higher grades available upon request |
| Yield Strength | ≥240 MPa (Commercial) / ≥310 MPa (Structural) | Ensures structural integrity for roofing and cladding applications |
| Elongation | ≥20% (t ≤0.6mm) / ≥22% (t >0.6mm) | Good formability for roll-forming and bending processes |
| Thickness Range | 0.14 mm – 1.50 mm | Custom thickness available; base metal thickness excludes coating |
| Width Range | 600 mm – 1,250 mm | Slit coils and cut-to-length sheets available |
| Length | Coil or 1,000 mm – 6,000 mm (sheets) | Coil inner diameter: 508 mm or 610 mm; coil weight up to 10 MT |
| Surface Finish / Paint Coating | Top coat: 15–25 μm PVDF / PE / SMP / HDP; Back coat: 5–10 μm | RAL/Pantone custom colors; gloss, matte, textured, or embossed finishes |
| Coating Adhesion | ≥0T bending (no cracking); Cross-cut adhesion Grade 0 per ISO 2409 | Excellent paint adhesion ensures long-term durability outdoors |
| Application | Roofing, wall cladding, sandwich panels, home appliances, agricultural buildings | Widely used in construction, industrial, and residential sectors |
| Certification | ISO 9001, SGS, BV, CE, RoHS | Third-party inspection and mill test certificates (MTC) available |
| Packaging | Eye-to-sky or eye-to-wall coils; waterproof paper + steel strip strapping | Export seaworthy packaging; palletized sheets available |
| MOQ | 25 MT per order (mixed specifications accepted) | Sample orders negotiable; lead time 15–25 days after order confirmation |
Galvalume Color Steel Sheet - Mill Direct Manufacturer
Galvalume color steel sheet stands as one of the most versatile and durable coated steel solutions available in today's construction and industrial markets. Engineered by combining a zinc-aluminum alloy coating with a high-performance polymer color finish, this product delivers outstanding anti-corrosion properties alongside exceptional aesthetic appeal. With a typical coating composition of 55% aluminum, 43.4% zinc, and 1.6% silicon by weight, galvalume color steel sheet outperforms conventional galvanized alternatives in both longevity and surface stability. It finds extensive application in roofing systems, wall cladding, pre-engineered buildings, agricultural facilities, and household appliances. Manufacturers and contractors across Southeast Asia, the Middle East, Africa, and South America increasingly specify this material for projects demanding a balance of structural reliability, weather resistance, and visual customization. Mill-direct supply ensures consistent quality control, shorter lead times, and cost-effective pricing that supports both large-scale commercial developments and smaller fabrication needs.
What is Galvalume Color Steel Sheet?
Galvalume color steel sheet is a cold-rolled steel substrate hot-dip coated with an aluminum-zinc alloy layer, followed by a chromate passivation treatment and a premium-grade organic color coating applied via a continuous roll-coating process. The result is a composite panel that combines the galvanic protection of zinc with the barrier protection of aluminum and the decorative durability of polyester, PVDF, or SMP resin topcoats. It is available in a broad spectrum of RAL and custom colors to meet diverse architectural specifications.
Galvalume Color Steel Sheet Manufacturing Process
Production begins with premium cold-rolled steel coils that are continuously hot-dip coated in a 55% Al-Zn alloy bath maintained at approximately 600°C. After cooling and surface treatment, coils pass through a multi-stage roll coater where primer and topcoat layers are applied and cured in a thermal oven at 230–250°C. Final inspection includes adhesion testing, pencil hardness evaluation, and T-bend flexibility checks to ensure compliance with ASTM A792 and EN 10346 standards before coiling and packaging.

Galvalume Color Steel Sheet Technical Specifications
Base metal thickness ranges from 0.12 mm to 1.50 mm, with coil widths from 600 mm to 1,250 mm. The AZ coating mass is typically AZ70, AZ100, or AZ150 (70–150 g/m² per side). Topcoat dry film thickness reaches 20–25 µm for standard polyester and 25–35 µm for PVDF grades. Tensile strength of the base steel meets a minimum of 550 MPa for high-strength grades per ASTM A792. Salt spray resistance exceeds 1,000 hours, and the color coating maintains a pencil hardness of 2H minimum.

Get a Competitive Quote for Galvalume Color Steel Sheet
Partner with our mill-direct team to secure the best pricing on galvalume color steel sheet for your next project. We offer flexible MOQs, rapid sampling, and full technical support from specification to delivery — ensuring your procurement process is smooth and cost-effective.

- 24/7 customer support available
- Free samples for quality evaluation
- Competitive pricing for bulk orders
- Professional technical consultation
Contact us today to get your free quote within 24 hours!