0.18–2.0mm AZ50–AZ180 Galvalume Steel Sheet DX51D+AZ for Roofing and Construction Applications

1. Product Overview

Galvalume steel sheet is coated with an aluminum-zinc alloy (Al-Zn) through a hot dip process.
Compared with traditional galvanized steel (GI), it provides more stable corrosion resistance and better performance in high-temperature environments.

The material is commonly used in roofing systems, wall cladding, and industrial panels where durability and environmental resistance are required.

2. Technical Solution

Performance is based on:

• Al-Zn alloy coating structure

• Aluminum component improves heat resistance

• Zinc provides sacrificial corrosion protection

• Metallurgical bonding enhances coating adhesion

3. Specifications

4. Application

• Roofing panels for residential and industrial buildings

• Wall cladding systems

• Industrial and warehouse structures

• HVAC duct systems

• Appliance and equipment panels

5. Processing

• Roll forming for roofing and panels

• Bending for structural profiles

• Cutting and slitting for customized sizes

• Pre-painting as substrate for PPGL

6. Advantages

• Better heat resistance than galvanized steel (GI)

• More stable corrosion resistance in industrial environments

• High surface reflectivity for roofing applications

• Suitable as substrate for pre-painted steel (PPGL)

7. How to Choose

• Roofing application → AZ150 or higher recommended

• High temperature environment → Galvalume preferred over GI

• Painting requirement → Anti-fingerprint (AFP) surface recommended

8. FAQ

Q1: What is the difference between AZ and GI?
AZ coating is an aluminum-zinc alloy, while GI is pure zinc coating. Their corrosion protection mechanisms are different.

Q2: Is AZ more corrosion resistant than GI?
In most atmospheric and industrial environments, AZ coating provides more stable long-term performance.

Q3: Can Galvalume steel be painted?
Yes, it is widely used as a substrate for pre-painted steel products (PPGL).

Q4: Is it suitable for structural applications?
It is mainly used for cladding and panel applications rather than heavy load-bearing structures.