ASTM A653 SGCC SCGA DX51D+Z Zinc Coated 4*8 Feet GI Steel Plate G60 G90 Z180 Z275 Hot Dipped Galvanized Steel Sheet cold rolled galvanised steel sheet plate
hot dip galvanized steel sheet . Hot-dip galvanized steel combines utility with beauty. It consists of tin, chrome, zinc or paint, which are the extra finish applied to the natural steel surface. The application of coating is to protect the surface of steel from oxidation and it is also used to enhance requirements for visual appearance.
Galvanized Steel sheet plate
Galvanized Steel sheet is used cold rolled steel sheet as substrates by a continuous hot-dip process. This method tightly adheres the coating to the steel with an iron-zinc alloy bonding layer formed by a diffusion process while the heated steel strip is in contact with the molten zinc. One of the drawbacks of Galvanized is that if the Zinc coating is scratched off the steel, the Steel is left unprotected, and is subject to failure. It has excellent corrosion resistance, paintability, and workability due to zinc’s characteristics.
Galvanized Steel sheet plate is specially designed steel sheets that are employed in several furbishing and manufacturing purposes. Steel coils are thin sheets that can be rolled up into incessant coils. The galvanized coils employed outdoor, as it shows anti rusting tendencies. Most significantly, it is used in constructing strong roofing system. Galvanized steel coil can be used outside because of its natural ability to avoid rust or corrosion. The coil itself is usually available in different dimensions. It may range from from 6 inches to 24 inches wide (15 cm to 51 cm), and up to 10 feet (3 m) long when rolled out flat.
Product Specification and Steel Grade (For Reference)
| Product name | hot rolled and cold rolled Galvanized Steel sheet plate |
| Material | ASTM A653, DX51D, Q195 ,DC01DX51D+Z, DX52D+Z , DX53D+Z ,DX54D+Z ,DX56D+ZHC1030 1300MS, HC1150 /1400MS, HC1200/1DC51D+Z , DC52D+Z, DC53D+Z, DC54D+Z ,DC56D+Z, H220PD+Z,H260PD+Z, H300LAD+Z,H340LAD+Z , H380LAD+ZSGCC CSTYPEB, SCGA2370D, SCG270E, SGCC/CGCC/TDC51DZM/TDC52DTS350GD/TS550GD/DX51D+ZEN 10142,EN 10147,EN 10292,JIS G3302, ASTM A653/A653M, BQB 420 |
| Zinc Coating | 20-275g/m2 |
| Thickness | 0.13-200mm |
| Width | 100-4000 mm ,As customer’s requirement |
| length | 1000-12000mm ,As customer’s requirement |
| Surface Structure | Mini/Big Spangle |
| Surface Treatment | Anti-Finger printing ,Chromated, oiled/ non-oiled |
| Package | standard export package (Detailed picture is as follows)Standard Ocean Freight PackageInside: Anti-rust paper,Plastic.Outside: Steel inner and outside guard board,Circle Iron guard board for both side,Outside iron guard board, 3 Radial Strapping and 3 Latitude Strapping.We can also pack according to your requirement. |
| Hardness | soft (normal), hard, full hard(G300-G550) |
| HS code | 721049 |
| Application | Hot dip galvanized steel is widely used in light industry, household applicances, automotive and construction industry. For various types of industrial and civil construction industry, light steel keel, building level board, corrugated board, roller shutter doors. |
| Brand name | Zhuosheng STEEL |
| Country of origin | China |
| Business type | Supplier and manufacturer |
| Product Name | Galvanized Sheet |
| Material | ASTM/AISI/SGCC/CGCC/TDC51DZM/TDC52DTS350GD/TS550GD/DX51D+Z Q195-q345SGCH/DX51D+Z,DX52D+Z,DX53D+Z,DX54D+Z,S220GD+Z/A653 |
| Standard | AISI,ASTM,BS,DIN,GB,JIS |
| Grade | |
| Width | 600-1500mm or as required |
| Thickness | 0.12-4.0mm or as required |
| Length | As customer’s requirement |
| Surface Structure | Regular spangle, Minimal Spangle, Zero Spangle, Big Spangle |
| Surface Treatment | Oiled and chromated, Anti fingerprints |
| Zinc Coating(g/m2) | 30-275g/m2 |
| Coil Diameter | 508mm/610mm |
| Coil Weight | 3-5 Tons or as required |
| Certification | ISO , SGS , BV |
| Technique | Cold Rolled / Hot Rolled |
| Edge | Mill Edge/ Silt Edge |
| Quality | Mill Test Certificate supplied with the shipment ,third party inspection is acceptable |
| Application | |
| Package | Standard Ocean Freight PackageInside: Anti-rust paper,Plastic.Outside: Steel inner and outside guard board,Circle Iron guard board for both side,Outside iron guard board, 3 Radial Strapping and 3 Latitude Strapping.We can also pack according to your requirement. |
| Delivery Time | 3~15days,according to the order’s quantity |
| MOQ | 5 Tons |
| Payment term | 30%T/T Advance + 70% Balance |
Available Size
| Thickness (mm) | Mill Edge Width (mm) |
Cut Edge Width (mm) |
Coil Inside Diameter (mm) |
|
| Coil | 1.50~6.50 | 720~1860 | 762 | |
| Coil | 6.51~10.00 | 850~1500 | 762 | |
| Strip | 1.50~6.50 | 30~720 | 762 |
| Thickness (mm) | Mill Edge Width (mm) |
Coil Inside Diameter (mm) |
|
| Plate | 6.00~150 | 500~4000 | 1200~18000 |
| Sheet | 1.50~5.99 | 50~1845 | 760~6100 |
Application of galvanised steel coils
Galvanised steel coils are widely used in the following industries:
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In the construction industry: to manufacture structural elements low-rise construction, light steel thin-walled structures, sandwich panels, lining of heat pipelines and various heat insulation, conditioning systems, metal roof shingle, profiled sheeting, culvert pipes, cladding of entry doors, elevators, reinforcement profiles for PVC windows and plastic doors, European-type fasteners for plasterboards, etc
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In the automotive industry: to manufacture external and internal car body parts, as well as to repair external public transport body parts, eg for buses and trams)
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In the machine building and instrumentation industries: to manufacture cases for electrical and mechanical equipment, home appliances, metering devices and packing
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To manufacture houseware (tableware, bowls, buckets, tanks, baths, etc)
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To manufacture colour-coated (and other type of coating) rolled steel
HDGC coil classification, product range and properties
Standards applied in different countries to set the requirements for galvanized steel coils specify steel grade and size ranges for these products. Galvanised steel coils are classified based on the following features:
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Application of coated steel (profiling, cold forming, manufacture of steel structures)
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Chemical composition of coating material (pure zinc, zinc-iron/zinc-aluminium/aluminium-zinc/zinc-magnesium alloys, etc)
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Thickness/weight of protective coating
HDGC coils according to European standards
Galvanised steel coils as per the European EN 10346 standards can be coated with zinc, zinc-iron alloy, zinc-aluminium alloy, aluminium-zinc alloy or aluminium-silicon alloy:
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Zinc coating (Z) is achieved by dipping the prepared strip into a bath with molten alloy, containing at least 99% zinc. This is the most common and traditional way of protecting rolled steel from corrosion.
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Zinc-iron coating (ZF) is formed by dipping a strip into a bath of molten zinc (at least 99% zinc) with further annealing to form a zinc-iron coating with an Fe content of 8-12%. Such coating is stronger than the traditional zinc coating and has better adhesion with substrate steel due to mutual diffusion between the iron and zinc in the surface layers. That is why this coating is less exposed to lamination or pitting under impact, mechanical stresses or deformation of treated products.
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Zinc-aluminium coating (ZA) is applied to rolled steel by dipping it into a bath of zinc and about 5% aluminium with a minor content of mishmetal (mix of metals). Rolled steel with such coating has better formability and corrosion protection properties compared with zinc-coated steel.
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Aluminium-zinc coating (AZ) is applied by dipping steel into a bath of molten metal consisting of 55% aluminium and 1.6% silicon (with the remaining being taken up by zinc). The combined action of these metals ensures the best corrosion protection compared with other coatings.
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Aluminium-silicon coating (AS) is created by dipping steel into a bath of molten metal containing aluminium and 8-11% silicon. Galvanized steel coil with such coating is highly resistant to oxidation at high temperature (up to 650°C) and highly resistant to chemical corrosion.
Galvanised steel coils manufactured according to the EN 10346 and DSTU EN 10346 standards can be made from the following steels:
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Low-carbon steel for cold forming (DX51D – DX57D). These products are classified based on suitability for cold forming: DX51D – bending and profiling quality; DX52D – drawing quality; DX53D – deep-drawing quality; DX54D – special deep-drawing quality; DX55D – special deep-drawing quality (only +AS); DX56D – extra deep drawing quality; DX57D – super deep drawing quality.
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Steel for construction and framing (S220GD – S550GD). Rolled products are arranged in increasing yield stress (Rp0.2), which is indicated in the marking. Rolled products of S220GD – S550GD steel are mainly used in the manufacture of formed sections (Z-, C-, sigma-, U-shaped profiles, etc) for light-gauge steel structures.
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Steel with high yield strength for cold forming (HX160YD, HX180YD, HX180BD, HX220YD, HX300LAD, etc). Such rolled products are arranged in increasing yield stress (Rp0.2), which is indicated in the marking. The marking also contains the following information: H – high-strength flat rolled products for cold forming; Х – as-rolled condition (hot-rolled or cold-rolled) is not defined; D – designed for hot-dip coating; B – heat-treated steel; Y – steel with higher formability; LA – low-alloy / micro-alloy steel.
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Cold-formable multi-phase steel (HDT450F, HCT490X, HDT590X, HCT780X, HCT980X, HCT780T, HDT580X, etc). Rolled products are arranged in increasing minimum tensile strength (Rm0.2), which is indicated in the marking. The marking also contains the following information: H – high-strength flat-rolled products for cold forming; С – cold-rolled products; D – hot-rolled products; Т (nnn) – the minimum tensile strength in MPa. The last symbol: F – ferrite-bainite, Х – dual-phase; Т – TRIP, С – complex-phase; М – martensite.
Galvanised coils as per the EN 10346 standard can be coated with zinc, zinc-iron alloy, zinc-aluminium alloy, aluminium-zinc alloy or aluminium-silicon alloy. The coating weight is expressed as grams per square metre and characterises the weight of the coating deposited on the both strip surfaces. The coating type (Z, ZF, ZA, AZ, AS) and nominal weight are indicated in the coating designation. Depending on the type of protective layer, the minimum weight of coating on both surfaces of a galvanized product can be 100-600 g/m2 (average value for three spots).
| Coating designation | Minimum total coating weight for both surfaces, g/m2 | Theoretical recommended values of the coating thickness per unit of surface for single-spot tests, microns | Density,g/cm3 | ||
| Three-spot | Single-spot | Reference value | Interval | ||
| Z100 | 100 | 85 | 7 | 5-12 | 7.1 |
| Z140 | 140 | 120 | 10 | 7-15 | |
| Z200 | 200 | 170 | 14 | 10-20 | |
| Z225 | 225 | 195 | 16 | 11-22 | |
| Z275 | 275 | 235 | 20 | 15-27 | |
| Z350 | 350 | 300 | 25 | 19-33 | |
| Z450 | 450 | 385 | 32 | 24-42 | |
| Z600 | 600 | 510 | 42 | 32-55 | |
Typical Applications
This material is ubiquitous in industries requiring corrosion resistance at a reasonable cost:
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Construction: Roofing, wall cladding (siding), gutters, downspouts, structural frames, and purlins.
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HVAC: Ductwork, ventilation systems.
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Automotive: Non-critical body panels, brackets, and chassis parts.
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Appliances: Housings for water heaters, outdoor AC units, and internal parts.
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General Fabrication: Electrical enclosures, cabinets, shelving, and agricultural equipment.
How to Choose the Right Specification
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Corrosion Environment:
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Indoor, Dry: A standard coating like G60 / Z180 is sufficient.
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Outdoor, General: G60 / Z180 is common for siding and roofing.
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Outdoor, Severe (Coastal, Industrial) or for critical components: Specify G90 / Z275 for longer service life.
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Fabrication Needs:
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If you plan to paint the final product, ensure the surface is suitable. Standard galvanized can sometimes cause fish-scaling in paint; a galvannealed sheet might be a better choice (not listed here).
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For severe forming, ensure the base steel grade (like DX51D) is suitable.
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Appearance:
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Standard hot-dip galvanized sheets have a visible crystalline “spangle” pattern. You can specify “minimal spangle” or “spangle-free” for a more uniform appearance if needed.
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In summary, this product listing is for the workhorse material of the construction and manufacturing world: cold-rolled steel protected by a hot-dip zinc coating. The key decision point is the coating weight (G60 vs. G90 / Z180 vs. Z275), which directly determines the product’s durability and lifespan in its operating environment.
SGCC, SGC, and DX51D all refer to commercial-quality, cold-rolled steel sheets that have been coated with zinc through the hot-dip galvanizing process. The primary purpose is corrosion resistance. These are essentially the same type of product, just defined by different regional standards.
Typical Applications
This is a versatile material used across many industries for applications requiring rust resistance without the cost of stainless steel.
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Construction: Roofing and wall cladding, gutters, downspouts.
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Home Appliances: Housings for washing machines, refrigerators, air conditioners.
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Automotive: Non-critical body panels, interior brackets, chassis parts.
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General Manufacturing: Electrical cabinets, switch boxes, ventilation ducts, shelving, and furniture.
How to Specify Your Order
When ordering, you need to provide more details beyond just the grade:
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Coating Mass (Most Important for Corrosion Life): This is often specified as Z60 to Z275 (g/m²) for European standards or G60 to G90 (oz/ft²) for ASTM.
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Standard Coating (e.g., Z120/Z140): For indoor or less corrosive environments.
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Heavy Coating (e.g., Z180/Z275): For outdoor exposure, roofing, and siding.
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Sheet Dimensions: Thickness, width, and length (e.g., 0.5mm x 1000mm x 2000mm).
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Surface Treatment:
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Regular Spangle: Standard shiny, crystalline pattern.
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Minimal Spangle: A more uniform, less reflective surface, better for painting.
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Phosphated or Chromated: Surface treatments to improve paint adhesion or provide temporary protection against white rust.
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In summary, “SGCC SGC DX51D Hot-Dip Galvanized Steel Sheets” describes a high-quality, formable, and corrosion-resistant steel product used for countless manufacturing and construction purposes. The listing of multiple standards assures buyers of its international acceptability and quality.
Breakdown by Standard and Designation
| Standard | Designation | Meaning and Focus |
|---|---|---|
| JIS G 3302 (Japan) | SGCC | Steel Galvanized Cold Commercial. This is the most common global designation for general-purpose galvanized steel. The “C” denotes a “Commercial” quality base steel. |
| JIS G 3302 (Japan) | SGC | Steel Galvanized Cold. This is a broader category. SGCC is a subset of SGC. SGC can have different base steel qualities (e.g., SGC400 for structural strength), but in practice, it’s often used interchangeably with SGCC. |
| EN 10346 (Europe) | DX51D | D = Cold Forming, X = Base Steel for Non-Structural Use, 51 = Sequential Number, D = Non-alloy, Annealed. This specifies the base steel’s mechanical properties and intended use (excellent for deep drawing and forming). |
Key Takeaway: When you see SGCC, SGC, and DX51D listed together, the supplier is indicating they can provide galvanized steel that meets these various international standards, all of which are suitable for general fabrication and forming.
Key Characteristics of This Product
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Base Material: Cold-rolled steel strip. This provides a smooth surface and good formability.
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Coating Process: Hot-Dip Galvanizing (GI). The steel is immersed in a bath of molten zinc, creating a metallurgically bonded coating that provides excellent corrosion protection.
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Coating Type: Pure zinc coating (often symbolized by +Z after DX51D, e.g., DX51D+Z).
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Surface Appearance: Typically has a characteristic crystalline pattern known as spangle (which can be regular or minimal).
