55%-AL aluminum-coated steel coil, also known as GL (Galvalume), is a continuously hot-dip metal-coated steel coil composed of 55% aluminum and 45% zinc. Compared with traditional galvanized steel, the combination of aluminum and zinc enhances corrosion resistance and extends service life.

55%-AL aluminum-zinc coated steel coil, also known as GL (Galvalume), is a continuously hot-dip metal coated steel coil composed of 55% aluminum and 45% zinc. Compared to traditional galvanized steel, the combination of aluminum and zinc enhances corrosion resistance and extends service life.

The aluminum coating on the steel coil offers several advantages. First, the aluminum in the coating provides excellent corrosion barrier protection, even in harsh environments. It acts as a sacrificial layer, protecting the underlying steel from rust and maintaining its structural integrity.

Second, the zinc in the aluminum-zinc coating actively corrodes, providing electrochemical protection by safeguarding any exposed edges or scratches on the steel surface. This sacrificial protection ensures lasting performance and prevents corrosion from spreading throughout the steel coil.

55%-AL aluminum-zinc coated steel coils are widely used in various fields, including roofing, wall cladding, structural components, and automotive manufacturing. Its superior corrosion resistance and durability make it suitable for both indoor and outdoor applications, even in highly corrosive environments.

In addition, aluminum-zinc coated steel coils have excellent thermal reflectivity, reducing heat transfer into buildings or structures in hot climates, thereby improving energy efficiency. This characteristic helps reduce energy consumption and improve comfort.

55%-AL aluminum-zinc coated steel coils are available in a variety of thicknesses and widths to meet different project requirements. Depending on the specific design needs, the coils can be further processed into sheets, profiles, or other custom shapes.

Product Specifications

Technical Standards	JIS 3302/GB 2518/EN10143
Grade	DX51D+Z,SGCC
Width	30-1250mm
Thickness	0.10-1.20mm
Zinc Coating	Z40-300g/m2
ID Coil	508mm or 610mm

Item		Nominal Size(mm)
Nominal Thickness		0.1-1.5
Nominal Thickness	Steel Sheet and Steel Strip	500-1250
	Longitudinally Cut Steel Strip	<600
Nominal Length	Steel Sheet	1000-8000
Nominal Length	Steel Strip and Longitudinally Cut Steel Strip	610 or 508