EN 10025-3 S355N Steel Plate | S355N Fine Grain Structural Steel
What is EN 10025-3 S355N Steel Plate?
As a professional steel plate supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present EN 10025-3 S355N Steel Plate (Material Number: 1.0545).
S355N is a normalized (or normalized rolled) weldable fine-grain structural steel under the European standard EN 10025-3. It provides a minimum yield strength of 355 MPa (for thickness ≤ 16 mm) and is impact tested at –20°C with a minimum energy of 40 J. Compared with the corresponding EN 10025-2 S355 grades, S355N offers a finer grain structure, better toughness and improved weldability. SHH STEEL sources this material directly from leading Chinese steel mills, ensuring competitive mill-direct pricing, stable quality and reliable delivery.
We supply S355N steel plate in thicknesses from 6 mm to 150 mm (thicker plates available on request), widths up to 3000–4000 mm, and lengths up to 12000–18000 mm. Custom cutting, shot blasting and priming services are available. All plates are delivered with full Mill Test Certificates (EN 10204 3.1).
Material Specification
EN 10025-3 S355N steel plate is produced in accordance with EN 10025-3.
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | EN 10025-3 | Full compliance |
| Steel Grade | S355N (1.0545) | Confirmed |
| Delivery Condition | Normalized (+N) | Confirmed |
| Product Form | Steel Plate | Available |
| Thickness Range | 6 mm – 150 mm | Custom sizes available |
| Width / Length | Up to 3000–4000 mm / 12000–18000 mm | Custom cutting supported |
| Certification | EN 10204 3.1 / 3.2 | Available |
Chemical Composition
According to EN 10025-3, the chemical composition is specified for both ladle analysis (cast analysis) and product analysis.
Ladle Analysis (Cast Analysis)
| Element | Max. / Range (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Silicon (Si) | ≤ 0.50 |
| Manganese (Mn) | 0.90 – 1.65 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.025 |
| Niobium (Nb) | ≤ 0.05 |
| Vanadium (V) | ≤ 0.12 |
| Aluminium (Al total) | ≥ 0.020 |
| Titanium (Ti) | ≤ 0.05 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.50 |
| Molybdenum (Mo) | ≤ 0.10 |
| Copper (Cu) | ≤ 0.55 |
| Nitrogen (N) | ≤ 0.015 |
Product Analysis
| Element | Max. / Range (%) |
|---|---|
| Carbon (C) | ≤ 0.22 |
| Silicon (Si) | ≤ 0.55 |
| Manganese (Mn) | 0.85 – 1.75 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.030 |
| Niobium (Nb) | ≤ 0.06 |
| Vanadium (V) | ≤ 0.15 |
| Aluminium (Al total) | ≥ 0.015 |
| Titanium (Ti) | ≤ 0.06 |
| Chromium (Cr) | ≤ 0.35 |
| Nickel (Ni) | ≤ 0.55 |
| Molybdenum (Mo) | ≤ 0.13 |
| Copper (Cu) | ≤ 0.60 |
| Nitrogen (N) | ≤ 0.017 |
Note:
- V + Nb + Ti ≤ 0.22%
- Mo + Cr ≤ 0.30%
- The minimum Al content does not apply if sufficient other nitrogen-binding elements are present.
Mechanical Properties
Mechanical properties of EN 10025-3 S355N (longitudinal direction):
| Thickness (mm) | Yield Strength ReH (min) | Tensile Strength Rm | Elongation A (min) | Impact Energy KV (min) |
|---|---|---|---|---|
| ≤ 16 | 355 MPa | 470 – 630 MPa | 22% | 40 J at –20°C |
| > 16 ≤ 40 | 345 MPa | 470 – 630 MPa | 22% | 40 J at –20°C |
| > 40 ≤ 63 | 335 MPa | 470 – 630 MPa | 22% | 40 J at –20°C |
| > 63 ≤ 80 | 325 MPa | 470 – 630 MPa | 21% | 40 J at –20°C |
| > 80 ≤ 100 | 315 MPa | 470 – 630 MPa | 21% | 40 J at –20°C |
| > 100 ≤ 150 | 295 MPa | 450 – 600 MPa | 21% | 40 J at –20°C |
Delivery Conditions
SHH STEEL, as a China Mill-Direct Supplier, supplies EN 10025-3 S355N steel plate in the normalized (+N) condition.
Additional options:
- Shot blasting and shop primer
- Ultrasonic testing (EN 10160)
- Z-direction testing (Z15 / Z25 / Z35)
- Third-party inspection (SGS, BV, TUV, etc.)
Tolerances
Dimensional tolerances for S355N steel plate follow EN 10029 (for plates).
- Thickness, width and length tolerances according to the ordered class.
- Flatness according to EN 10029.
- Edge conditions: Mill edge or cut edge (flame / plasma).
Tighter tolerances can be provided upon request.
Weldability
S355N has excellent weldability due to its fine-grain structure, controlled carbon equivalent and low impurity levels. It can be welded by all conventional methods (SMAW, GMAW, FCAW, SAW).
Recommended welding consumables:
| Welding Process | Recommended Consumables |
|---|---|
| SMAW (Stick) | E7018, E7016 |
| GMAW (MIG/MAG) | ER70S-6 |
| FCAW | E71T-1 |
| SAW | EM12K + suitable flux |
Preheating may be required for thicker plates. Low-hydrogen consumables are recommended for critical applications.
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| S355N | EN 10025-3 | — |
| 1.0545 | EN | Material number |
| Q355N / Q355D | GB/T 1591 | Closest Chinese equivalents |
| A633 Grade C/D (approx.) | ASTM | Similar fine-grain concept |
| StE 355 | DIN (old) | Former designation |
Applications
EN 10025-3 S355N is widely used in structural applications requiring high strength and good toughness. Typical uses include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Building Structures | Heavy beams, columns, frames – S355N Structural Steel |
| Bridges | Bridge components – S355N Bridge |
| Machinery | Heavy equipment frames – S355N Machinery |
| Construction | High-strength construction – S355N Construction |
| Offshore & Industrial | Structural components – S355N Industrial |
| General Fabrication | Welded fine-grain high-strength structures – S355N Fabrication |
Why Choose SHH STEEL
SHH STEEL is a China Mill-Direct Exporter. We maintain long-term strategic cooperation with major Chinese steel mills and act as a first-level (primary) agent. This direct mill supply model allows us to offer competitive mill-direct pricing, faster delivery times, stable and traceable quality, and full Mill Test Certificates (EN 10204 3.1 / 3.2) for EN 10025-3 S355N Steel Plate.
Customers benefit from reliable supply, short lead times and cost-effective solutions for fine-grain structural steel projects worldwide. Our professional export team provides technical support and customized processing services to meet project requirements.
FAQ
- What does the “N” in S355N mean?“N” indicates that the steel is supplied in the normalized condition and meets impact requirements of minimum 40 J at –20°C.
- What is the difference between S355N and S355NL?Both have the same strength level. S355N is impact tested at –20°C (40 J), while S355NL is impact tested at –50°C (27 J), offering better low-temperature toughness.
- What is the material number of S355N?1.0545
- Is S355N a fine-grain steel?Yes. EN 10025-3 grades are normalized fine-grain structural steels with controlled grain size for improved toughness and weldability.
Conclusion
EN 10025-3 S355N (1.0545) Steel Plate from SHH STEEL is a normalized fine-grain structural steel offering high strength, excellent weldability and reliable toughness at –20°C. As a China Mill-Direct Exporter, we provide competitive pricing, fast delivery and consistent quality backed by full mill certifications. Trust SHH STEEL for your S355N fine grain structural steel plate requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. EN 10025-3 S355N Steel Plate, S355N steel plate, S355N fine grain structural steel, EN 10025 S355N, S355N equivalent, S355N supplier, 1.0545
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