Looking for high-quality S550GD Galvanized Steel Plate for structural and industrial projects? You’ve come to the right place. As a trusted manufacturer with 20 years of steel expertise, GNEE STEEL delivers S550GD plates that meet EN 10346 standards, combining exceptional strength and corrosion resistance. In this guide, we’ll explore what S550GD galvanized steel is, its technical specs, key applications, and 2026 pricing to support your procurement decisions.
S550GD galvanized steel plate is a high-strength, hot-dip galvanized product designed for demanding structural applications. Galvanized steel, in general, is carbon steel coated with zinc to prevent rust, and it’s widely used in construction, automotive, and machinery industries due to its durability and cost-effectiveness. Common galvanized steel grades include S235GD, S350GD, S550GD, and S700GD, with S550GD standing out for its high yield strength (≥550MPa), making it ideal for load-bearing components.
Chemical Composition & Mechanical Properties of S550GD Galvanized Steel Plate
The performance of S550GD galvanized steel plate is determined by its precise chemical composition and superior mechanical properties, ensuring reliability in critical applications.
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Chemical Composition (EN 10346 Standard)
| Element |
Content (Max, %) |
Role in Performance |
| Carbon (C) |
0.12 |
Balances strength and weldability |
| Silicon (Si) |
0.50 |
Enhances corrosion resistance and heat stability |
| Manganese (Mn) |
1.60 |
Boosts tensile strength and formability |
| Phosphorus (P) |
0.035 |
Minimized to avoid brittleness |
| Sulfur (S) |
0.025 |
Controlled to prevent welding defects |
| Aluminum (Al) |
0.02-0.10 |
Improves zinc coating adhesion |
| Zinc (Zn) |
Coating weight: 60-275g/m² |
Provides corrosion protection |
| Property |
Standard Value |
Test Method |
| Yield Strength (MPa) |
≥550 |
EN 10002-1 |
| Tensile Strength (MPa) |
600-750 |
EN 10002-1 |
| Elongation (%) |
≥14 |
EN 10002-1 |
| Impact Strength (J) |
≥27 (at -20°C) |
EN 10045-1 |
| Coating Adhesion |
Passes 180° bend test without peeling |
EN 10346 |
These properties make S550GD galvanized steel plate suitable for bending, welding, and forming into complex structures without compromising strength or corrosion resistance.
Standard Specifications & Key Applications of S550GD Galvanized Steel Plate
GNEE STEEL offers S550GD galvanized steel plate in a range of specifications to meet diverse project requirements, with customization options available for thickness, width, and zinc coating weight.
| Parameter |
Range |
| Thickness |
1.5mm - 12.0mm |
| Width |
800mm - 1500mm |
| Length |
2000mm - 12000mm |
| Zinc Coating Type |
Hot-dip galvanized (HDG) |
| Surface Finish |
Regular spangle, minimized spangle |
| Tolerance |
Thickness: ±0.05mm; Width: ±2mm |
S550GD galvanized steel plate’s high strength and corrosion resistance make it a top choice across multiple industries:
In the
construction industry, it’s used for roof trusses, purlins, wall panels, and structural frames in industrial buildings, warehouses, and high-rise structures—where load-bearing capacity and long-term durability are essential. For the
automotive sector, it serves as material for truck chassis, trailer frames, and heavy-duty vehicle components, withstanding road wear and environmental exposure. In
machinery manufacturing, it’s employed in agricultural equipment, conveyor systems, and machine bases, thanks to its ability to resist impact and corrosion. It’s also ideal for
infrastructure projects like bridges, guardrails, and electrical transmission towers, where harsh outdoor conditions demand robust materials.
2026 Latest Price of S550GD Galvanized Steel Plate
The price of S550GD galvanized steel plate is influenced by thickness, zinc coating weight, order quantity, and market fluctuations. GNEE STEEL’s 2026 factory prices offer competitive value for high-quality products:
| Thickness Range |
Zinc Coating Weight (g/m²) |
Price per Ton (USD) |
Minimum Order Quantity |
| 1.5mm - 3.0mm |
60-120 |
$950 - $1,050 |
5 tons |
| 3.1mm - 6.0mm |
120-200 |
$900 - $1,000 |
3 tons |
| 6.1mm - 12.0mm |
200-275 |
$850 - $950 |
2 tons |
Prices are subject to change based on raw material costs and global market trends. For the most accurate quotation, provide your specific requirements, including size, coating weight, and order volume.
S550GD Galvanized Steel Plate from GNEE STEEL is the perfect choice for projects requiring high strength, corrosion resistance, and reliability. Our strict quality control processes—from raw material inspection to final product testing—ensure every plate meets EN 10346 standards. With 20 years of manufacturing experience, ISO 9001 certification, and customizable solutions, we’re committed to delivering products that exceed your expectations.
Whether you’re working on a construction project, automotive manufacturing, or machinery production, GNEE STEEL has the S550GD galvanized steel plate you need. Contact us today to get a personalized quotation, technical data sheet, or sample—let our team support your project’s success with premium steel products and professional service.
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