GI Coils Building Purlins Hot Dipped Galvanized Sheet Metal 900mm -
Galvanized sheet or coil is defined as a carbon steel sheet coated
with zinc on both sides. Continuous hot dipping, or
electro-galvanizing are the two processes used to produce
galvanized sheet and coil. Generally speaking, the hot dip process
consists of passing the steel through a bath of molten zinc. The
electro-galvanizing process consists of the application of zinc by
electrolytic disposition. The result is a layer of zinc tightly
adhering to the base metal through an iron-zinc bonding layer.
A zinc coating is one of the most effective and economical methods
of protecting bare steel from a corroding environment. The zinc not
only serves as a barrier between the steel and the environment, it
will sacrifice itself to protect the underlying steel sheet.
Sacrificial, or galvanic protection occurs when two dissimilar
metals are in contact and coupled with water and oxygen. Zinc
corrodes preferentially to the iron in steel. This protection
prevents corrosion of the steel at areas not covered with zinc.
Thus, the spread of corrosion from cut edges, drill holes, etc. is
Our Hot-dipped Galvanized products, as well as our Galvannealed
(zinc-iron alloy coated) products are manufactured to ASTM A-653
specifications. Our Electrogalvanized products conform to ASTM
Regular/mini/zero spangle, chromated, skin pass, dry etc.
600-1250mm(900mm, 1250mm, 1000mm the most common)
Material Types for Galvanized 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 Galvanized Coil and Sheet Steel
Typical applications for Galvanized Coil and Sheet products include
exterior building products, ductwork, HVAC products, flashing,
electrical boxes and other electrical products, roofing, doors,
sashes, automotive parts, appliances, commercial and residential
steel framing, truss plates, metal building purlins, and any other
products requiring a corrosion resistant material. As the primary
supplier of galvanized sheet and coil to over 1500 customers for
over 20 years, just let us know the end use of your product and we
can help you find the material that is right for you.