Pre - Painting Cold Rolled Galvalume Steel Coil With Zinc Coated
Galvalume products (GL) use cold rolled steel sheets with various
strengths and thicknesses as the raw materials and are coated with
aluminum (Al 55%), zinc (Zn 43.5%) and silicon (Si 1.5%) alloy. It
possesses excellent anti-corrosion properties. Product Features:
Derived from hot-dip aluminum galvanization and hot-dip zinc
galvanization technology, Galvalume products possess excellent
properties of both products, i.e. the exceptional anti-corrosion
and anti-oxidation properties of hot-dip aluminum galvanization,
and superior electric-chemical properties of hot-dip zinc
galvanization, which make Galvalume sheets less prone to rust and
corrosion at the edge and on the scratched surface. The major
properties of Galvalume steel sheets include the following:
(1) Smooth surface and superior anti-corrosion property. They can
resist corrosion up to 2 to 6 times longer than hot-dip zinc
galvanized steel sheets;
(2) Excellent heat resistance and anti-oxidation properties. They
will not tarnish under 300℃ and can be used normally under 500℃ for
a long time. They can resist corrosion caused by water and mud. Its
ability to resist corrosion caused by water is better than that of
hot dip aluminum galvanization, and its ability to resist corrosion
caused by mud is better than that of hot-dip zinc galvanization.
They are the ideal materials for auto mufflers, exhaust pipes, food
dryers, water heaters, etc. In addition, its heat reflection ratio
exceeds 75% and is twice as high as zinc galvanized steel sheets;
(3) Excellent properties for being coated and processed. They are
highly adhesive to organic color coatings. Its processed and welded
properties are similar to those of zinc galvanized steel sheets.
They can be bent and pressed while maintaining exceptionally
beautiful appearance. Since aluminum is lighter than zinc (the
density of aluminum and zinc galvanization is 3.7kg/dm3 as compared
with 7.1kg/dm3 for zinc galvanization), for galvanization of the
same thickness, aluminum and zinc galvanization reduces the amount
of metal used and hence results in cost savings.
Regular/mini/zero spangle, chromated, skin pass, dry etc.
600-1250mm(900mm, 1250mm, 1000mm the most common)
Material Types for Galvalume Coil and Sheet Steel
Commercial Steel (CS Types A, B, and C)
Forming Steel (FS Types A and B)
Deep Drawing Steel (DDS Types A and C)
Extra Deep Drawing Steel (EDDS)
Structural Steel (SS) – further designated by Grades
High Strength Low Alloy Steel (HSLAS)
In addition, the Hot Dipped Galvanized as well as the Galvannealed
products are available in a variety of coating weights including
G-90, G-60, G-40, and G-30 for the Hot Dipped Galvanized products,
and A-60 and A-40 for the Galvannealed products.
Typical Applications for Galvalume Coil and Sheet Steel
Include roofing, base material for pre-painting.