AZ120 26 Gauge Galvalume Steel Sheet DX51D for Roofing Panels and Garage Door Manufacturing

１．Product Overview

AZ120 Galvalume Steel Sheet is a hot-dip aluminum-zinc coated steel product designed for roofing panels, garage doors, wall cladding, and industrial building components. Combining the corrosion resistance of aluminum with the sacrificial protection of zinc, AZ120 coating provides extended service life in outdoor and humid environments.

Manufactured using DX51D steel substrate and produced in accordance with ASTM A792, JIS G3321, and EN 10346 standards, this 26 gauge galvalume sheet is widely used in construction, appliance manufacturing, transportation equipment, and industrial fabrication.

２．Technical Solution

The steel substrate is continuously coated with an aluminum-zinc alloy layer through a hot-dip process. The AZ120 coating forms a durable protective barrier against moisture, oxidation, and atmospheric corrosion.

A passivated surface treatment further enhances storage stability and reduces the risk of white rust during transportation and processing. The DX51D substrate provides excellent forming characteristics for profiling, bending, roll forming, and roofing panel production.

３．Specifications

４．Application

• Roofing panels
• Roof components
• Garage doors
• Exterior wall cladding
• Industrial buildings
• Commercial buildings
• Refrigeration equipment
• Electrical control cabinets
• Air conditioning systems
• Ventilation equipment
• Solar water heaters
• Automotive components
• Highway fencing
• Vending machines
• Medical equipment panels
• Furniture and decorative products

５．Processing

• Roll forming
• Corrugating
• Cut-to-length processing
• Bending
• Stamping
• Profiling
• Panel fabrication
• Roofing sheet production
• Industrial component manufacturing

６．Advantages

• AZ120 aluminum-zinc coating provides superior corrosion resistance compared with conventional galvanized products in many outdoor environments.
• DX51D steel substrate offers excellent formability and processing performance.
• Passivated surface treatment improves storage stability and transportation protection.
• Suitable for roofing, wall systems, and industrial fabrication.
• Compatible with ASTM A792, JIS G3321, and EN 10346 requirements.
• Regular spangle finish provides a uniform metallic appearance.
• Supports long service life under atmospheric exposure conditions.

７．How to Choose

• Choose AZ120 coating for projects requiring enhanced corrosion protection and extended outdoor service life.
• Select DX51D when forming flexibility and fabrication performance are important.
• Use 0.27mm thickness for lightweight roofing and wall panel applications.
• Consider passivated material when products may be stored or transported for extended periods.
• Verify width requirements according to roofing machine specifications and finished panel designs.

８．FAQ

Q1．What is AZ120 galvalume coating?

AZ120 refers to an aluminum-zinc alloy coating weight designed to provide long-term corrosion protection for steel products.

Q2．What standards can this galvalume sheet meet?

The product can be manufactured according to ASTM A792, JIS G3321, and EN 10346 standards.

Q3．Is DX51D suitable for roofing panel production?

Yes. DX51D is widely used for roofing sheets, wall panels, garage doors, and other formed building products because of its excellent forming properties.

Q4．What industries commonly use AZ120 galvalume steel?

Construction, appliance manufacturing, transportation, industrial equipment, refrigeration systems, and electrical enclosure production are common applications.

Q5．What is the advantage of galvalume steel over conventional galvanized steel?

The aluminum-zinc coating provides enhanced corrosion resistance and improved durability in many atmospheric environments, especially for roofing and outdoor construction applications.