Hot Dip Galvanized Coil

Galvanized coil, the thin steel sheet is immersed in a molten zinc tank to make a layer of zinc thin steel sheet adhered to its surface.
It is mainly produced by continuous galvanizing process, that is, the rolled steel sheet is continuously immersed in a plating tank with molten zinc to make a galvanized steel sheet; alloyed galvanized steel sheet. This steel sheet is also made by hot dip method, but after leaving the tank, it is immediately heated to about 500℃ to form an alloy film of zinc and iron. This galvanized coil has good coating adhesion and weldability.

// Product  Description //

Galvanized coil, the thin steel sheet is immersed in a molten zinc tank to make a layer of zinc thin steel sheet adhered to its surface.

It is mainly produced by continuous galvanizing process, that is, the rolled steel sheet is continuously immersed in a plating tank with molten zinc to make a galvanized steel sheet; alloyed galvanized steel sheet. This steel sheet is also made by hot dip method, but after leaving the tank, it is immediately heated to about 500℃ to form an alloy film of zinc and iron. This galvanized coil has good coating adhesion and weldability.


Full cold galvanizing process:

Chemical degreasing → hot water washing → water washing → electrolytic degreasing → water washing → acid washing → rust removal → water washing → electrogalvanizing process → water washing → passivation → hot water washing → drying → quality inspection → packaging and sales


Galvanized Coil.jpg


Product Parameters

Product NameGalvanized Coil
Thickness0.12mm-3.5mm
Width600mm-1500mm
StandardAISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc.
Zinc Layer 40-400g/m²


Chemical Composition

StandardGradeCSiMnPSTi
Forcold FormingChinese StandardDX51D+Z0.120.500.600.1000.0450.30
DX52D+Z0.120.500.600.1000.0450.30
DX53D+Z0.120.500.600.1000.0450.30
DX54D+Z0.120.500.600.1000.0450.30
DX56D+Z0.120.500.600.1000.0450.30
DX57D+Z0.120.500.600.1000.0450.30
Forcold FormingJapanese StandardSGCC0.150.500.800.0500.0300.025
SGCD1SGCD20.120.100.500.500.600.450.0400.0300.0300.0300.0250.025
SGCD30.080.500.450.0300.0300.025
SGCD40.060.500.450.0300.0300.025
For StructureJapanese StandardSGC3400.250.501.700.2000.0350.025
SGC400SGC4400.250.250.500.501.702.000.2000.2000.0350.0350.1500.150
SGC4900.300.502.000.2000.0350.025
SGC5100.300.502.500.2000.0350.025
For StructureAISI StandardS220GD+Z0.200.600.700.1000.0450.025
S250GD+Z0.200.600.700.1000.0450.025
S280GD+Z0.200.600.700.1000.0450.025
S320GD+Z0.200.600.700.1000.0450.025
S350GD+Z0.200.600.700.1000.0450.150
S550GD+Z0.200.600.700.1000.0450.150


Mechanical Properties

GradeYield Strength MPa≥Tensile Strength MPa≥Elongation A%≥
DX51D Z/ZM/AZ/AM240-380270-50022
DX52D Z/ZM/AZ/AM140-300270-42026
DX53D Z/ZM/AZ/AM140-260270-38030
DX54D Z/ZM/AZ/AM120-220260-35036
S220GD Z/ZM/AM22030020
S250GD Z/ZM/AZ/AM25033019
S280GD Z/ZM/AM28036018
S300GD A/AM30038018
S320GD Z/ZM/AM32039017
S350GD Z/ZM/AZ/AM35042016
S450GD A/AM45048015
S550GD Z/ZM/AZ/AM550550-

Use of The EnvironmentRecommended Zinc Thickness
Indoor UseZ40 or Z120(40g/㎡or 120g/㎡)
SuburbsZ200 and Painting (200g/㎡)
Urban or Industrial AreaZ275 (275g/㎡) or G90 (US Standard) and painted
Coastal AreaThicker than Z275 (275g/㎡) or G90 (US Standard) and painted
Punch or Deep Drawing ApplicationThicker than Z275 (275 grams/㎡) or G90 (US Standard) avoid coating peeling after stamping


Surface Treatment TypeCodeFeatures
Chromic Acid TreatmentCGood corrosion resistance, suitable for bare state
Chromic Acid Treatment+OilingSGood corrosion resistance
Phosphoric Acid Treatment (Including Sealing Treatment)PHave a certain corrosion resistance, good paint performance
Phosphoric Acid Treatment (Including Sealing Treatment)+OilingQHas a certain corrosion resistance, good paint performance, prevent rust during transportation and storage
Phosphoric Acid Treatment (Excluding Sealing Treatment)THave a certain corrosion resistance, good paint performance
Phosphoric Acid Treatment (Excluding Sealing Treatment)+OilingVHas a certain corrosion resistance, good paint performance, and prevent rust
OilingOPrevent rust during transportation and storage
No TreatmentMSuitable for immediate painting


Galvanized Surface Selection


Zero SpangleMinimized SpangleNormal SpangleLarge Spangle
 1725437868689870183713009664.png1725437874689870206135758848.png 1725437879689870226893373440.png 1725437884689870250888986624.png


Material Comparison

Chinese StandardJapan StandardEuropean Standard
DX51D Z/DC51D Z (CR)SGCCDX51D Z
DX52D Z/DC52D ZSGCD1DX52D With
DX53D Z/DC53D Z/DX54D Z/DC54D ZSGCD2/SGCD3DX53D Z/DX54D Z
S220/250/280/320/350/550GD ZSGC340/400/440/490/570S220/250/280/320/350GD Z
DX51D Z/DD51D Z (HR)SGHCDX51D Z


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// Industry Applications //

Building Materials Field

Electrogalvanizing has a wide range of applications in the field of building materials. First of all, electro-galvanizing can be used to manufacture construction steel, which not only prevents metal oxidation and prolongs its service life, but also enhances the toughness, strength and corrosion resistance of steel, and improves the performance of steel. Secondly, in the decoration of building exterior walls, electro-galvanized aluminum alloy, electro-galvanized iron alloy and other materials are also widely used, which can protect the steel structure and prevent oxidation, but also has the characteristics of beauty and fire prevention.


Automobile Manufacturing Field

Electrogalvanizing is also a commonly used material in the field of automobile manufacturing. Electro-galvanized coating can be used for surface protection and repair of automobile parts to avoid oxidation corrosion and damage, and to improve the service life of automobiles. The electro-galvanized coating can also be used in the manufacture of parts such as car frames and casings to avoid oxidation and corrosion, and improve the overall quality and durability of the car.


Home Appliance Manufacturing Field

In the field of home appliance manufacturing, galvanizing also has its important applications. For example, the manufacture of refrigerators, washing machines and other household appliances shell, lining, refrigerator and other parts, usually need to use electro-galvanized material for surface coating, to prevent metal oxidation, improve appearance and performance.


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Every certificate is a testament to jinggong's commitment; every recognition carries the trust of our clients and the industry. We cherish these honors, and see them as the responsibility and driving force for our continued progress.

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// Partners //

Our products have established long- term cooperative relationships with many well-known domestic and international companies.Currently, our products are exported to regions such as the Middle East,South America, Southeast Asia,and Africa,and have gained unanimous recognition from customers both at home and abroad.

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TESTIMONIALS

The warehouse steel structure project in Texas, USA, used only ASTM A36 carbon steel from Jinggong. Its mechanical properties are stable, the material certification documents are complete, and the project supervisor approved it on the first attempt, saving us significant time and costs.

Jane Doe

Jane Doe

Carbon Steel Field

"The outdoor scaffolding systems of power plants along the Southeast Asian coast are exposed to high salt spray environments year-round. Jinggong's galvanized steel has a uniform and dense coating, and its salt spray test results far exceeded expectations. After three years of inspections, no red rust was found on any of the substrates, demonstrating its convincing corrosion resistance."

John Smith

John Smith

Galvanized Steel Sector

"Our heavy mining machinery frames require extremely high-strength steel. Jinggong supplies S355J2 steel according to the European standard EN 10025-2, which has excellent impact toughness and performs robustly under extreme loads, greatly improving equipment safety."

Sarah Wilson

Sarah Wilson

Steel Section

"Before cooperating with Jinggong, we were worried about whether Chinese steel could consistently meet JIS standards. In fact, every batch of SPHC cold-rolled coils they provided had chemical composition and mechanical property data that were completely consistent with the certificate. This rigor gave us complete peace of mind."

Michael Brown

Michael Brown

Cold-Rolled Coil

"Our newly built logistics warehouse in Canada uses PPGI from Jinggong for both the roof and wall panels. The product not only meets CSA standards, but its unique weather-resistant coating design also allows the building to maintain its excellent appearance and performance under extreme cold and sun exposure."

Emily Davis

Emily Davis

Color-Coated Steel Sheets

"From the initial carbon steel trial order to the current comprehensive cooperation on stainless steel, galvanized steel, and color-coated steel sheets, Jinggong has proven its strength with consistently stable quality and professional service. They are not only suppliers of materials, but also our reliable partners in solving material technology problems."

Robert Johnson

Robert Johnson

Aluminized Zinc Steel

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