Hvad er SGCC? Danmark

SGCC steel is hot-dip galvanized steel coils and sheets that meet the JIS G3302 standard. It has excellent durability and corrosion resistance. The thickness of SGCC material ranges from 0.25 mm to 3.2 mm.

The first letter "S" of SGCC stands for steel, while "G" stands for galvanized. The third letter "C" stands for cold-rolled steel, i.e. the base material is cold-rolled steel, and the fourth letter "C" stands for commercial quality.

Hvad er SGCC?

SGCC (hot-dip galvanized steel sheet) refers to a steel sheet that is coated with a layer of zinc on the surface of the cold-rolled steel sheet through a hot-dip galvanizing process. The hot-dip galvanizing process uses high temperature to combine zinc with the steel substrate to form a zinc layer with good adhesion, which not only enhances the corrosion resistance of the steel sheet, but also improves its strength and wear resistance.

Manufacturing Process Of SGCC:

The manufacturing process of SGCC steel sheet is mainly divided into several steps. The following is a detailed flow of the SGCC manufacturing process.

Raw material selection and preparation:The production of SGCC steel sheet begins with the selection of high-quality cold-rolled steel strip. This type of steel strip is usually made of low carbon steel or other alloy steels, with good plasticity, machinability and weldability. When selecting materials, it is necessary to ensure that the chemical composition of the steel meets the corresponding standards to ensure its good mechanical properties and adaptability to subsequent processing.

Cold rolling process:The raw steel strip is pressed into the required thickness through a cold rolling process. The cold rolling process is formed by passing the steel strip through multiple rollers. This process makes the surface of the steel strip smooth, the thickness is uniform, and its strength and hardness are increased.

Hot-dip galvanizing process:After cold rolling, the steel strip enters the hot-dip galvanizing tank, and the surface of the steel strip is coated with zinc liquid at high temperature to form a zinc layer. This process is to treat the steel plate through a molten zinc bath. The surface of the zinc will react chemically with the steel plate to form a zinc-iron alloy layer while maintaining the purity of the zinc layer. The thickness of the zinc layer is usually 20-25 microns, but it can also be adjusted according to needs in certain cases.

Køling og skæring:The hot-dip galvanized steel strip will pass through a cooling tank to quickly reduce the temperature to ensure the solidification of the zinc layer. After cooling, the steel strip will be cut into the required size and enter the final finished product inspection and packaging stage.

Main Characteristics Of SGCC:

Corrosion resistance: The surface of SGCC steel is covered with a layer of zinc. The zinc layer not only acts as a physical barrier, but also has a self-healing mechanism. When a small scratch appears on the surface, the zinc will react with the surrounding air to form a protective film to prevent further corrosion.

High mechanical strength: Through the processing of cold-rolled steel strip, the strength of the steel plate is improved and has good load-bearing capacity. Usually, the strength of SGCC is between 300MPa and 500MPa, which can meet the needs of most applications. SGCC with different zinc layer thicknesses will also affect the strength of the steel plate. A thicker zinc layer may make the steel plate slightly brittle, but it will not affect most of its use characteristics.

Strong processability: SGCC steel plates show good plasticity during processing and can be subjected to various forming processes, including stamping, bending, stretching, etc. In addition, its surface is flat and defect-free, suitable for painting and coating.

Uniform coating: The hot-dip galvanizing process ensures that the thickness of the galvanized layer on the surface of SGCC steel is uniform, further improving the protective performance of the steel.

Varmebestandighed: SGCC steel plates have good heat resistance and can usually withstand a temperature range of 200℃ to 300℃. Beyond this temperature, the zinc layer may begin to oxidize, resulting in a weakened anti-corrosion effect.

Application Areas Of SGCC:

As a material with good performance and wide application, SGCC has been widely used in many industries.

Construction industry: roofs, wall panels, steel structures and other construction projects.

Home appliance industry: external structural parts of home appliances such as refrigerators, washing machines, air conditioner casings, microwave ovens, etc.

Automobile industry: parts such as automobile body and chassis structure.

Electronic products: TV casings, computer cases, mobile phone casings, etc.

Home decoration: aluminum alloy door and window frames, indoor and outdoor decorative panels, etc.

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