ASTM A792 DX51D Galvalume Steel Coil AZ30-AZ150 for Roofing and Building

１．Product Overview

ASTM A792 Galvalume Steel Coil is manufactured using a 55% aluminum, 43.5% zinc, and 1.5% silicon alloy coating to provide enhanced corrosion resistance compared with conventional galvanized steel. The product is widely used for roofing, wall cladding, appliances, transportation equipment, industrial fabrication, and building envelope systems.

Available in DX51D grade with coating options from AZ30 to AZ150, the material combines excellent formability, heat reflectivity, and long-term outdoor durability for construction and manufacturing applications.

２．Technical Solution

The steel substrate is continuously hot-dip coated with a Galvalume alloy consisting of 55% aluminum, 43.5% zinc, and 1.5% silicon. The aluminum-rich coating improves atmospheric corrosion resistance, while zinc provides sacrificial protection to exposed edges and cut sections.

Surface treatments such as passivation, chromating, anti-fingerprint coating, light oiling, and dry treatment further improve storage stability and processing performance.

３．Specifications

４．Application

The product is widely used in roofing systems, roof panels, wall cladding, industrial buildings, warehouses, garage doors, window shutters, refrigerators, washing machines, air conditioners, ventilation systems, automotive components, highway barriers, industrial control cabinets, vending machines, furniture, lighting fixtures, and medical equipment.

５．Processing

The steel substrate is continuously hot-dip coated with aluminum-zinc alloy and then processed into coils or sheets. Additional treatments such as passivation, chromating, anti-fingerprint coating, and oiling can be applied according to end-use requirements.

The material can be further processed into roofing sheets, wall panels, appliance components, and fabricated steel products.

６．Advantages

• ASTM A792 compliant production
• 55% aluminum-zinc alloy coating technology
• AZ30-AZ150 coating range available
• Excellent corrosion resistance in outdoor environments
• Good heat reflectivity and thermal performance
• Suitable for roll forming and fabrication
• Multiple surface treatment options available
• Widely used in construction and industrial manufacturing
• Stable quality with export-standard packaging

７．How to Choose

• Choose AZ30-AZ50 for indoor and general applications.
• Choose AZ100-AZ150 for roofing, wall cladding, and long-term outdoor exposure.
• Select DX51D for applications requiring good formability.
• Choose anti-fingerprint or passivated surfaces when improved storage protection and appearance are required.
• Confirm thickness, width, coating class, and surface treatment based on project specifications.

８．FAQ

Q1．What standards does this product comply with

The product is manufactured according to ASTM A792.

Q2．What coating composition does Galvalume use

The coating consists of 55% aluminum, 43.5% zinc, and 1.5% silicon.

Q3．What coating range is available

The available coating range is AZ30-AZ150.

Q4．What thickness range can be supplied

Thicknesses from 0.13mm to 1.0mm are available.

Q5．What applications are suitable for this product

It is suitable for roofing, wall cladding, appliances, transportation equipment, industrial fabrication, warehouses, commercial buildings, and steel structure construction projects.