Galvalume corrugated steel sheet is a popular choice for metal roofing and wall cladding in industrial, agricultural, and commercial construction. It is produced from Galvalume steel coil—a carbon steel substrate coated with a 55% aluminum, 43.4% zinc, and 1.6% silicon alloy . This coating gives Galvalume a strong edge over traditional galvanized steel in demanding environments.

Why Choose Galvalume Corrugated Sheets?

Superior Corrosion Resistance
The aluminum-zinc alloy coating provides both a physical barrier and cathodic protection. Field data shows that Galvalume steel sheets can last 2 to 4 times longer than galvanized steel in the same environment . In salt spray tests, AZ150-grade Galvalume has shown excellent resistance, maintaining its integrity long after galvanized samples begin to rust.

High Heat Reflectivity
Galvalume reflects up to 75% to 80% of solar radiation, helping reduce roof surface temperature and building cooling loads . This makes it an effective choice for projects in warm climates where energy efficiency is a priority.

Good Formability and Weldability
Galvalume steel coil maintains good formability and weldability, allowing it to be roll-formed into corrugated profiles without damaging the coating. This supports efficient on-site installation and reduces fabrication complexity.

Coating Weight: AZ150 as a Benchmark

For long-life roofing and cladding applications, AZ150 is the recommended minimum coating weight . While the material cost of AZ150 Galvalume may be around 10% to 20% higher than some galvanized options, its significantly longer service life often makes it the more cost-effective choice over the full project lifecycle.

Typical Applications

• Industrial buildings: Factory roofs, warehouse cladding, logistics centers.

• Agricultural facilities: Livestock shelters, grain storage, greenhouses.

• Coastal and high-humidity areas: Where long-term corrosion resistance is required.

For project-specific guidance on Galvalume corrugated steel sheets, please contact our sales team for technical support.