Galvanized Aluminium Steel Coils for Roofing

Galvanized Aluminium Steel Coils for Roofing is produce a similar process to that used to manufacture galvanized steel. While both products have steel base, galvanized steel has a coating of 100% zinc, whereas zinc-alum coated steel has an alloy coating of 43.5% zinc, 55% aluminum and 1.5% silicon.

Descriptions:

1）Grade：SGCC DX51D, DC51D 

2）Thickness：0.15—3.5mm 

3）Width：600---1500mm 

4）Zinc Coating：50-150g/m2 

5）Technique：Zinc and Aluminum alloy Coating 

6）Application：General use, construction industry, household appliance industry, automobile industry and industrial instruments. 

7）Surface Treatments：Chromic acid,oiled, bright finish. 

8）Spangle：Spangle Free/Min Spangle. 

9）Coil Weight：4 tons or as per customer required 

10）Coil ID：508mm

Features: 

a) has superior longer term corrosion resistance in most atmospheric conditions. 

b) Has a finely spangled silvery matt finish. 

c) is readily paintable using good quality primers and water-base acrylic topcoats. 

d) Performs exceptionally well in area not regularly washed by rainwater (heavy drainage area).

The galvalume & aluzinc steel sheet in coil uses the cold-rolled steel sheet as a substrate and solidified by 55% aluminum, 

43.4% zinc and 1.6% silicon at 600 °C. It combines the physical protection and high durability of aluminum and the 

electrochemical protection of zinc. It is also called aluzinc steel coilplate.

Advantage:

● Strong corrosion resistance, 3 times that of galvanized steel sheet.

● The density of 55% aluminum is smaller than the density of zinc. When the weight is the same and the thickness of the 

plating layer is the same, the area of the galvalume steel sheet is 3% or larger than that of the galvanized steel sheet. 

Surface Finish