DX51D+AZ Galvalume Steel Coil with AZ30–AZ150 Coating and 914–1250mm Width for Roofing and Cladding Applications

1. Product Overview

Hot dipped galvalume steel coil is an aluminum-zinc coated steel product used where longer corrosion resistance, heat reflectivity, and stable forming performance are required. Compared with conventional zinc-coated material, the Al-Zn coating provides a different protection mechanism and is commonly selected for roofing sheets, wall cladding, and light building panels.

For roofing applications, buyers usually focus on coating mass, width compatibility, and surface condition. Widths of 914–1250 mm are suitable for common roll forming lines, while the metallic surface of galvalume is often chosen for exposed building applications that require both durability and appearance consistency.

2. Technical Solution

Product performance is based on the following technical characteristics:

• Hot dip Al-Zn coating with controlled AZ coating mass
• Aluminum component improving heat resistance and reflective performance
• Zinc component providing sacrificial protection at cut edges and damaged points
• Regular spangle surface suitable for standard roofing and cladding use
• Passivated, oiled, or anti-finger surface treatment for storage and downstream processing

For roofing and cladding systems, AZ coating level directly affects corrosion resistance and service life. Thinner gauges support lightweight panel production, while coil format improves productivity in continuous roll forming operations.

3. Specifications

4. Application

• Roofing sheets and roof components
• Wall cladding panels
• Garage doors and shutters
• Household appliance outer panels
• Ventilation and industrial enclosures
• General sheet and roll formed building products

5. Processing

• Cut-to-length sheet production
• Slitting into strips
• Roll forming for roofing and cladding profiles
• Bending and profiling
• Surface painting or further coating
• Custom cutting according to project requirements

6. Advantages

• Al-Zn coating provides longer corrosion resistance in many outdoor environments
• Reflective metallic surface is suitable for roofing and visible cladding use
• 914–1250 mm width range fits common profile forming lines
• 0.12–1.50 mm thickness range supports lightweight building panels
• Multiple surface treatments help improve storage stability and downstream processing
• Coil supply improves production efficiency for continuous roofing fabrication

7. How to Choose

• Roofing in outdoor environments → select higher AZ coating level
• Visible cladding application → regular spangle is commonly accepted
• Painting or further coating → anti-finger or passivated surface is often preferred
• Lightweight profile production → choose thinner gauges according to design stiffness
• Production line matching → confirm width, coil ID, and coil weight with equipment capacity

8. FAQ

Q1: Is galvalume coil suitable for roofing applications?
Yes, it is widely used for roofing sheets and roof components because of its corrosion resistance and reflective metallic surface.

Q2: What is the difference between AZ coating and zinc coating?
AZ coating is an aluminum-zinc alloy coating, while conventional galvanized coil uses zinc coating only. The protection mechanism and service behavior are different.

Q3: Can the coil be processed into roofing sheets?
Yes, it is commonly supplied for roll forming into roofing and wall cladding profiles.

Q4: What surface treatment is suitable for storage and transport?
Passivated or oiled surface is commonly selected to improve storage stability before processing.

Q5: What width range is available for this product?
Standard width is 914–1250 mm, which is suitable for common roofing and cladding production lines.