JIS G3321 DX51D AZ50 Prepainted Galvalume Steel Coil with Regular Spangle for Roofing and Appliance Applications

１．Product Overview

JIS G3321 DX51D AZ50 Prepainted Galvalume Steel Coil is manufactured using a hot-dip aluminum-zinc coating process and is designed for roofing, wall cladding, appliance manufacturing, and industrial fabrication. The combination of aluminum and zinc provides excellent corrosion resistance while maintaining good formability and paint adhesion.

The AZ50 coating offers reliable protection in moderate atmospheric environments and serves as an ideal substrate for prepainted steel production.

２．Technical Solution

The steel substrate is coated with an aluminum-zinc alloy layer that combines the barrier protection of aluminum with the sacrificial protection of zinc. Surface treatments such as chromating, skin passing, and anti-corrosion processing improve surface quality and storage stability.

The material supports roll forming, painting, bending, profiling, and stamping operations while maintaining coating integrity.

３．Specifications

４．Application

The product is widely used in roofing systems, wall cladding panels, garage doors, industrial buildings, household appliances, ventilation systems, transportation equipment, electrical cabinets, refrigeration equipment, signboards, and furniture manufacturing.

５．Processing

The coil can be processed through slitting, cut-to-length production, roll forming, bending, profiling, stamping, and prepainting operations. It is suitable for manufacturing roofing sheets, wall panels, and appliance components.

６．Advantages

• Excellent corrosion resistance with aluminum-zinc coating
• Suitable for prepainted steel production
• Good formability and paint adhesion
• Available in multiple spangle finishes
• Wide thickness and width range
• Stable surface quality after skin pass treatment
• Suitable for roofing and cladding systems
• Reliable performance in outdoor applications

７．How to Choose

• Choose AZ50 coating for projects requiring economical corrosion protection.
• Select DX51D grade for general forming applications.
• Choose regular spangle when traditional galvanized appearance is preferred.
• Select wider coil widths for roofing and panel production efficiency.
• Confirm thickness based on structural and fabrication requirements.

８．FAQ

Q1．What standard does this product comply with
The product is manufactured according to JIS G3321 requirements.

Q2．What AZ coating range is available
The available aluminum-zinc coating range is 30-275g/m², including AZ50.

Q3．Can this product be used for prepainted steel production
Yes, it is widely used as a substrate for prepainted Galvalume and PPGL products.

Q4．What thickness range can be supplied
Thicknesses from 0.13mm to 6.0mm are available.

Q5．What applications is this product suitable for
It is suitable for roofing, wall cladding, appliances, industrial equipment, transportation components, and furniture manufacturing.