According to the production and processing methods, it can be divided into the following categories:

① Hot-dip galvanized steel sheet. Dip the thin steel plate into the molten zinc tank to make the thin steel plate with a layer of zinc adhered to its surface. At present, the continuous galvanizing process is mainly used for production, that is, the coiled steel plate is continuously immersed in a galvanizing tank with molten zinc to make a galvanized steel plate;
② Alloyed galvanized steel plate. This kind of steel panel is also made by hot dip method, but it is heated to about 500℃ immediately after coming out of the tank, so that it can form an alloy film of zinc and iron. This galvanized sheet has good paint adhesion and weldability;
③ Electro-galvanized steel plate. The galvanized steel panel manufactured by electroplating has good processability. However, the coating is thinner and its corrosion resistance is not as good as that of hot-dip galvanized panels;
④ Single-sided galvanized steel and double-sided galvanized steel. Single-sided galvanized steel sheet, that is, a product that is galvanized on only one side. In terms of welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheet. In order to overcome the shortcomings of one side without galvanizing, there is another kind of galvanized sheet coated with a thin layer of zinc on the other side, that is, double-sided differential galvanized sheet;
⑤ Alloy, composite galvanized steel. It is an alloy made of zinc and other metals such as aluminum, lead, zinc, or even a composite plated steel plate. This kind of steel plate not only has excellent antirust performance, but also has good coating performance;
In addition to the above five types, there are also colored galvanized steel panels, printed galvanized steel panels, PVC laminated galvanized steel panels, etc. But the most commonly used is still hot-dip galvanized sheet.


SGGalvanized Iron

Galvanized Iron cold rolled steel passes through a molten zin pot conotaining 97% zinc (0.03% or less AL), undergoing the galvanizing process, which gives each side of the sheet an equal thickness of coating. Depending on the surface treatment of the plated sheet, they are categorized into Regular Spangle, Zero Spangle and Extra Smooth.

Corrosion Resistance
All galvanized steel is treated with chromic acid for protection against rust, to maintain original surface luster for a longer period.

Galvanized steel is produced through continuous annealing, tempering, and post-treatment process so as to have very excellent formability.

Galvanized Iron Material Specification

D 3506G 3302
Commercial QualitySGCCSGCC
Lock Forming QualitySGCD1SGCD1
Drawing QualitySGCD2SGCD2
Deep Drawing QualitySGCD3SGCD3
Deep Drawing Special KilledSGCD3-NSGCD3-N
Structural QualitySGC340~570SGC340~570

Mechanical Properties

Yield Point
KS D 3506 / JIS G 3302SGCC

Mechanical Properties

Elongation (%)
Norminal Thickness (mm)
0.25~0.400.40~0.600.60~1.01.0~1.61.6~2.52.5 over
KS D 3506 / JIS G 3302

Galvanized Iron Surface Finish & Quality

ClassificationWeight Of
Zinc Coating
Surface Finish & Characteristics
Regular SpangleZ06-Z60Original patterns and gross. Excellent anti-corrosive property
Zero SpangleZ06-Z60Fine crystals by suppressing cystal growth during solidification of zinc. Even surface
Extra SmoothZ06-Z60Execution of skin pass on the Zero Spangle surface.
Beautiful surface and excellent painting.
GalvanealedF04-F18Maximization of welding and painting property with alloy treatment of iron property and zinc.

Galvanized Iron Surface Finish & Quality

Regular SpangleCommercial Quality. Lock Forming Quality
Drawing Quality. Structural Quality
Zero SpangleCommercial Quality. Drawing Quality
Structural Quality
Extra SmoothCommercial Quality. Drawing Quality
Structural Quality
GalvanealedCommercial Quality. Drawing Quality
Structural Quality