Galvanized Steel S350GD
Looking for equivalent grades of galvanized steel S350GD to meet regional project standards? You've come to the right place. As a direct steel factory with global certification, GNEE Steel supplies EN 10346-compliant S350GD galvanized steel and helps clients match it to local grades worldwide. In this guide, we'll list equivalents from Europe, the US, China, and Japan, plus compare their key properties to ensure seamless substitution.
Galvanized steel
Galvanized steel is steel coated with zinc for corrosion resistance, available in grades like DX51D (general-use), S320GD (medium-strength), and S350GD (high-strength). S350GD is a structural grade with ≥350MPa yield strength, widely used in construction beams, automotive chassis, and machinery frames-its equivalents let global projects comply with local standards without sacrificing performance.
Whether you're sourcing for a European infrastructure project or a US automotive plant, knowing S350GD's equivalents avoids compliance delays and ensures material compatibility with existing designs.
Global Equivalent Grades of S350GD Galvanized Steel
S350GD galvanized steel has established equivalents across major regional standards, each meeting similar strength and corrosion resistance requirements. The table below details key equivalents and their respective standards:
| Region | Equivalent Grade | Standard Number | Key Matching Indicator (Yield Strength) | Coating Compatibility |
|---|---|---|---|---|
| Europe | S350GD+Z | EN 10346 | ≥350MPa (direct base grade) | Z140-Z275 |
| United States | ASTM A653 Grade 80 (G90) | ASTM A653 | ≥350MPa (Grade 80 strength class) | G60-G90 (60-90g/m²) |
| China | Q355GNHD | GB/T 2518 | ≥345MPa (functional match for most uses) | Z140-Z275 |
| Japan | SGHC440 | JIS G3302 | ≥340MPa (compatible for structural use) | Z120-Z275 |
| South Korea | SS490GAL | KS D3506 | ≥340MPa (matches S350GD's load capacity) | Z140-Z275 |
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Critical Notes on Equivalence:
European S350GD+Z is the direct reference, with "+Z" indicating hot-dip galvanization-identical to GNEE Steel's core product.
US ASTM A653 Grade 80 uses "G90" to denote coating weight (90g/m² total), equivalent to S350GD's Z140 (140g/m² total) in corrosion resistance.
Chinese Q355GNHD has a slightly lower yield strength (345MPa) but is universally accepted as equivalent for non-extreme load applications.
Property Comparison of S350GD and Its Equivalents
To ensure substitution suitability, compare key mechanical and coating properties of S350GD with its equivalents. The table below focuses on critical performance indicators:
| Property | S350GD (EN 10346) | ASTM A653 Grade 80 (US) | Q355GNHD (China) | SGHC440 (Japan) |
|---|---|---|---|---|
| Yield Strength (Min) | ≥350MPa | ≥350MPa | ≥345MPa | ≥340MPa |
| Tensile Strength Range | 410-550MPa | 448-586MPa | 470-630MPa | 440-590MPa |
| Elongation (A80mm) | ≥17% | ≥15% | ≥18% | ≥17% |
| Zinc Coating Weight | Z140-Z275 | G60-G90 | Z140-Z275 | Z120-Z275 |
| Bending Performance | 180°, r=1.5t | 180°, r=1.5t | 180°, r=1.5t | 180°, r=2.0t |
| Salt Spray Resistance | ≥600h (no red rust) | ≥500h (no red rust) | ≥600h (no red rust) | ≥550h (no red rust) |
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Key Takeaways:
All equivalents meet or exceed S350GD's core strength requirements for structural use-ASTM A653 even has a higher tensile strength upper limit.
S350GD and Q355GNHD share identical coating options (Z140-Z275), making them interchangeable for outdoor applications like coastal construction.
SGHC440 requires a slightly larger bending radius (2.0×thickness vs. 1.5×thickness), so adjust forming processes if substituting for S350GD.
Dimensional Compatibility of S350GD and Equivalent Coils/Plates
Dimensional consistency is critical for manufacturing and installation. Below is the standard thickness range of S350GD and its equivalents, ensuring compatibility with existing tooling and designs:
| Grade | Thickness Range | Width Range | Length/Coil Weight | Application Compatibility |
|---|---|---|---|---|
| S350GD | 0.8-12.0mm | 1000-2000mm | 2-12m (plates); 5-30 tons (coils) | Heavy construction, automotive |
| ASTM A653 Grade 80 | 0.4-6.4mm | 914-1524mm | 2-6m (plates); 5-25 tons (coils) | Light automotive, US construction |
| Q355GNHD | 0.8-12.0mm | 1000-2000mm | 2-12m (plates); 5-30 tons (coils) | Chinese infrastructure, machinery |
| SGHC440 | 0.8-6.0mm | 914-1829mm | 2-6m (plates); 5-25 tons (coils) | Japanese automotive, light structural |
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Customization Support:
GNEE Steel offers S350GD galvanized steel in dimensions matching regional equivalents-for example, 914mm width (36") to align with ASTM A653's standard, or 1829mm width (72") for JIS G3302 compatibility.
How to Choose the Right Equivalent for Your Project
Selecting the right equivalent depends on your project's location, standards, and application. Follow these guidelines:
- European/Global Projects:
Use S350GD+Z (EN 10346) for direct compliance with CE marking requirements-ideal for cross-border infrastructure projects.
- North American Projects:
Choose ASTM A653 Grade 80 (G90) to meet US/Canadian building codes. Its G90 coating is widely recognized in the automotive and construction industries.
- Chinese Domestic Projects:
Opt for Q355GNHD (GB/T 2518) for cost-effectiveness and local supply chain efficiency. It's the go-to grade for Chinese prefabricated buildings.
- Japanese/Korean Projects:
Select SGHC440 (JIS G3302) or SS490GAL (KS D3506) to align with regional automotive standards-common for Toyota, Hyundai, and Kia supplier projects.
Understanding the equivalent grades of S350GD galvanized steel simplifies global sourcing and ensures project compliance. Whether you need ASTM A653 for the US, Q355GNHD for China, or the base S350GD for Europe, GNEE Steel provides compatible, high-quality products that meet regional standards.
If you're unsure which equivalent fits your project, or need dual-certified S350GD (e.g., EN 10346 + ASTM A653), our team can help. Contact GNEE Steel now to discuss your regional standard requirements and get a personalized quotation for S350GD galvanized steel or its equivalents!
