SGCC (Hot-Dip Galvanized Cold-Rolled Steel) is a hot-dip galvanized cold-rolled steel sheet, which is formed by immersing the cold-rolled steel sheet in molten zinc liquid has excellent anti-corrosion properties.
Coating process
Hot-dip galvanizing: Cold-rolled steel (SPCC) is immersed in zinc liquid at about 450°C to form a thicker zinc layer (20~150μm).
Spangle: Zinc crystals form patterns when cooling, which is a typical feature of hot-dip galvanizing (can be reduced or eliminated by controlling the process)
What is SGCC Hot dip galvanized coils used for?
SGCC has excellent corrosion resistance (thick zinc layer, suitable for outdoor environment), high surface hardness (zinc layer hardness is about 70~80HV), and lower cost than electrogalvanizing (SECC) and stainless steel
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Industry |
Typical Uses |
Advantages |
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Construction |
Roof, wall panels, ventilation ducts |
Strong weather resistance and long service life (20~50 years) |
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Home appliances |
Refrigerator back panel, washing machine shell |
Low cost and stable mass production |
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Automobile |
Chassis parts, fuel tank, exhaust pipe guard plate |
Stone impact resistance, salt spray corrosion resistance |
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Agriculture |
Greenhouse frame, granary |
Rust-proof + structural strength |
Is SGCC the same as SECC?
no the same
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Features |
SGCC (hot-dip galvanizing) |
SECC (electro galvanizing) |
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Coating thickness |
20~150μm (thicker) |
3~20μm (thinner) |
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Corrosion resistance |
Excellent (suitable for outdoor use) |
General (suitable for indoor use) |
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Surface quality |
With zinc flowers, slightly rough |
Smooth without zinc flowers, high precision |
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Processing performance |
Stamping/welding requires special processes |
Good stamping, bending and welding performance |
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Cost |
Low (high zinc consumption but simple process) |
Medium (high energy consumption for electroplating) |
What is SGCC hot-dip galvanized steel material equivalent to?
SGCC is a hot-dip galvanized cold-rolled steel sheet in the Japanese JIS standard, and uses pure zinc coating (Z) by default.
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Standard/Country |
Equivalent grades |
Description |
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China (GB) |
DX51D+Z |
Common commercial grade hot-dip galvanized sheet ("D" stands for cold-rolled substrate, "Z" stands for pure zinc coating) |
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USA (ASTM) |
ASTM A653 CS Type B |
Commercial grade hot-dip galvanized steel sheet (CS=Commercial Steel) |
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Europe (EN) |
DX51D+Z |
Consistent with national standard (EN 10346 standard) |
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Korea (KS) |
SGCC |
Directly adopt JIS standard |
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Germany (DIN) |
DX51D+Z |
European general code |