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SGCC Steel

SGCC steel is hot-dip galvanized steel coils and sheets that comply with JIS G3302 standard. It offers superior durability and corrosion resistance. The thickness of SGCC material is 0.25 mm to 3.2 mm. If you’re interested in learning more about SGCC steel, please don’t hesitate to contact us.

What Is SGCC Material?

SGCC material is hot dip zinc coated steel for commercial quality. The first letter “S” stands for steel, while “G” indicates galvanization. The third letter “C” refers to cold-rolled steel. That is, the base metal is CR steel. And the fourth letter “C” means commercial quality. It is equivalent to DX51D material according to EN 10327 standard.

SGCC Steel Coil at Factory

SGCC Steel Coil at Factory

Galvanized Coils Zero Spangle

Galvanized Coils Zero Spangle

Uses of SGCC Steel

Because of its high corrosion resistance, SGCC steel is an ideal material for outdoor applications. It is versatile in numerous fields including power towers, railways, containers, lampposts, steel structure, and light industry. In addition, it is commonly utilized as construction materials such as corrugated sheets, roofing tiles, pipelines, fencing, etc. It also finds its use in the manufacturing of automotive parts, for example, body panels, car ceilings and chassis components. Moreover, it is also very suitable in the furniture industry, such as lampshades, desks, bookshelves and other commodities.

Advantages of SGCC Steel

  • Excellent corrosion resistance
  • Strong weather resistance
  • Bright surface and beautiful appearance
  • Easy to process
  • Economical solution

SGCC Steel Properties

Item C Mn P S Yield strength Tensile strength Hardness
SGCC ≤0.15% ≤0.8% ≤0.05% ≤0.05% ≥205 MPa ≥270 MPa 60 HRb

SGCC V.S. SPCC V.S. SECC

SPCC, SGCC and SECC are steel material grades in Japanese Industrial Standards (JIS). They stand for different products.

SGCC — Hot dip galvanized cold rolled steel sheet and coil for general uses; which uses SPCC steel as base metal. It is often followed by “Z+number” to showing the zinc layer thickness. For example, SPCC  Z12 means the double sides zinc coating weighs 120 g/m2.

SPCCCold rolled steel sheet and coil for general use, which is equivalent to the Chinese Q195-215A grades or St12 in German Standard. S here is for steel, and P is for plate; C is for cold and the last C is for commercial quality. The last letter can be “D”, that is, SPCD, which means drawing quality.

SECC — It refers to electro galvanized steel sheets and coils. The SECC stands for “S” for steel, “E” for electroplating, “C” for cold rolling, and the fourth “C” for commercial quality. The steel is made by electrolysis, where a layer of zinc coating is deposited onto the steel surface to improve its corrosion resistance. Electro-galvanized steel also maintains the workability of cold-rolled sheet. It is widely used in home appliances, computer casings, doors panels, etc.

Hot Dip Galvanized Coil Production Line

HDG Production Line

Galvanized Steel Factory

Galvanized Steel Factory

Differences Between SGCC and SECC

SGCC metal stands for “hot-dip galvanized steel,” which is a type of steel that is coated with zinc through a hot-dip galvanizing process. This process involves immersing the steel in a bath of molten zinc, which creates a protective layer over the steel. SGCC steel is highly resistant to corrosion, making it suitable for external applications and large parts.

On the other hand, SECC stands for “electro-galvanized steel,” which is produced by coating a thin layer of zinc on the surface through an electroplating process. It uses cold-rolled sheet as its raw material, which allows it to maintain the same processing performance as cold-rolled sheet. Therefore, it is more suitable for internal uses and small parts.

The main difference between SGCC and SECC steel is their galvanizing methods, which results in their different properties and applications. The former generally has a thicker zinc layer (30-275 g/m2) and stronger anti-corrosion ability, while the zinc layer of SECC steel is very thin (10-30 g/m2). In terms of appearance, the former has a rough and bright surface, while the latter has a smooth and dark surface. Additionally, SECC has better paintability, giving it a better gloss, reflective intensity, and paint finish than SPCC after being painted. Moreover, the production cost of SGCC metal is lower than that of SECC, making it more widely used. Below is a table for your reference.

SGCC SECC
Formability Average Good
Paintability Average Good
Corrosion resistance Excellent Average
Appearance Rough and bright Smooth and dull

Conclusion

SGCC steel coils and sheets are available in various thicknesses, ranging from 0.25 mm to 3.2 mm. Additionally, the zinc coating thickness can range from 30-275 g/m2. As one of the top galvanized steel suppliers in China, Wanzhi Steel offers both hot-dip galvanized and electro-galvanized steel products in coil, sheet, and strip, all of which meet different industry standards. Welcome to contact us for more details!

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