Authentic Steel Group is a 32-year professional manufacturer and global supplier of hot-dip galvalume steel coils (GL / ZAM steel).

Our galvalume production complies with JIS G3321, EN 10215 and ASTM A792 standards, covering grades DX51D+AZ, DX52D+AZ, DX53D+AZ, DX54D+AZ, S280GD+AZ to S550GD+AZ.

We supply galvalume coils with thickness from 0.10 mm to 3.50 mm and width 870–1250 mm. Our ultra-thin high-strength galvalume steel has strong price competitiveness and is widely recognized by global buyers. Two surface types are available: anti-fingerprint (AFP) and non-anti-fingerprint.

Hot-dip galvalume steel is coated with 55% aluminum-zinc alloy on cold rolled substrate. It delivers superior weather resistance and heat resistance compared to regular galvanized steel, with a longer service life.

Anti-fingerprint (AFP) Galvalume: With transparent passivation protective film, it prevents fingerprint marks, boosts corrosion resistance and keeps a clean surface. Ideal for home appliance panels, interior decoration and high-end components.

Non-anti-fingerprint Galvalume: More cost-effective, good for bending and stamping. Fingerprints may appear after contact. Suitable for roofing, wall panels and construction.

Frequently Asked Questions  

Q1: What is galvalume steel coil?

A1: Galvalume (GL / ZAM) is cold rolled steel coated with 55% aluminum-zinc alloy, better anti-corrosion than galvanized GI steel.

Q2: What is AFP galvalume?

A2: AFP means anti-fingerprint treatment. It adds a transparent protective film to avoid fingerprints and improve corrosion resistance. 

Q3: What AZ coating weight can you supply?

A3: We provide AZ70, AZ100, AZ150, AZ200 and other customized Al-Zn coating weights. 

Q4: Main uses of galvalume steel?

A4: Roofing sheets, wall panels, home appliance shells, ventilation parts and decorative materials.