As a top 3 galvalume manufacturer in China, CNB is one of the first mills capable of producing AZ275 heavy coating galvalume steel. This S350GD high-strength grade is engineered for severe corrosion environments and structural applications, delivering both superior durability and mechanical strength.

The 275g/m² Al-Zn alloy coating forms a dense protective oxide layer on the surface, providing long-term anti-corrosion performance even in coastal, industrial and high-humidity regions. The S350GD structural steel base offers excellent load-bearing capacity, making it ideal for heavy-duty roofing, floor decks and steel framing systems.

Product Specification	Details
Product Name	Heavy Coating Galvalume Steel Coil (GL)
Thickness Range	0.6mm – 2.0mm
Width Range	1000mm, 1200mm, 1250mm, 1500mm
Coating Mass	AZ275 (275g/m², double side)
Steel Grade	S350GD
Coil Inner Diameter	508mm / 610mm
Coil Weight	5MT – 12MT per coil
Surface Treatment	Minimized spangle, chromated passivation
Applicable Standards	ASTM A792M, EN 10215, AS 1397
Main Applications	Coastal roofing, industrial plant cladding, floor decking, structural purlins, agricultural greenhouses

This product is the preferred solution for long-life construction projects in high-corrosion zones. It can be further processed into corrugated sheets, sandwich panels and structural profiles, and is widely supplied to coastal projects in Southeast Asia, Oceania and the Caribbean.