EN 10025-3 S420N Steel Plate | S420N Fine Grain Structural Steel
What is EN 10025-3 S420N Steel Plate?
As a professional steel plate supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present EN 10025-3 S420N Steel Plate (Material Number: 1.8902).
S420N 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 420 MPa (for thickness ≤ 16 mm) and is impact tested at –20°C with a minimum energy of 40 J. This higher-strength fine-grain grade is suitable for more heavily loaded structural applications while maintaining good toughness and weldability. SHH STEEL sources this material directly from leading Chinese steel mills, ensuring competitive mill-direct pricing, stable quality and reliable delivery.
We supply S420N 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 S420N 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 | S420N (1.8902) | 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) | ≤ 0.60 |
| Manganese (Mn) | 1.00 – 1.70 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.025 |
| Niobium (Nb) | ≤ 0.05 |
| Vanadium (V) | ≤ 0.20 |
| Aluminium (Al total) | ≥ 0.020 |
| Titanium (Ti) | ≤ 0.05 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.80 |
| Molybdenum (Mo) | ≤ 0.10 |
| Copper (Cu) | ≤ 0.55 |
| Nitrogen (N) | ≤ 0.025 |
Product Analysis
| Element | Max. / Range (%) |
|---|---|
| Carbon (C) | ≤ 0.22 |
| Silicon (Si) | ≤ 0.65 |
| Manganese (Mn) | 0.95 – 1.80 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.030 |
| Niobium (Nb) | ≤ 0.06 |
| Vanadium (V) | ≤ 0.22 |
| Aluminium (Al total) | ≥ 0.015 |
| Titanium (Ti) | ≤ 0.06 |
| Chromium (Cr) | ≤ 0.35 |
| Nickel (Ni) | ≤ 0.85 |
| Molybdenum (Mo) | ≤ 0.13 |
| Copper (Cu) | ≤ 0.60 |
| Nitrogen (N) | ≤ 0.027 |
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 S420N (longitudinal direction):
| Thickness (mm) | Yield Strength ReH (min) | Tensile Strength Rm | Elongation A (min) | Impact Energy KV (min) |
|---|---|---|---|---|
| ≤ 16 | 420 MPa | 520 – 680 MPa | 19% | 40 J at –20°C |
| > 16 ≤ 40 | 400 MPa | 520 – 680 MPa | 19% | 40 J at –20°C |
| > 40 ≤ 63 | 390 MPa | 520 – 680 MPa | 19% | 40 J at –20°C |
| > 63 ≤ 80 | 370 MPa | 520 – 680 MPa | 18% | 40 J at –20°C |
| > 80 ≤ 100 | 360 MPa | 520 – 680 MPa | 18% | 40 J at –20°C |
| > 100 ≤ 150 | 340 MPa | 500 – 650 MPa | 18% | 40 J at –20°C |
Density: 7.85 g/cm³
Delivery Conditions
SHH STEEL, as a China Mill-Direct Supplier, supplies EN 10025-3 S420N 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 S420N 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
S420N has good weldability for a higher-strength fine-grain structural steel. It can be welded by conventional methods (SMAW, GMAW, FCAW, SAW).
Recommended welding consumables:
| Welding Process | Recommended Consumables |
|---|---|
| SMAW (Stick) | E7018, E8018 |
| GMAW (MIG/MAG) | ER70S-6, ER80S-D2 |
| FCAW | E71T-1, E81T1 |
| SAW | EM12K / EH14 + suitable flux |
Preheating is generally recommended for thicker plates. Low-hydrogen consumables and controlled heat input are advised.
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| S420N | EN 10025-3 | — |
| 1.8902 | EN | Material number |
| Q420N / Q420D | GB/T 1591 | Closest Chinese equivalents |
| A633 Grade E (approx.) | ASTM | Similar fine-grain concept |
| StE 420 | DIN (old) | Former designation |
Applications
EN 10025-3 S420N is used in structural applications requiring higher strength. Typical uses include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Building Structures | Heavy beams, columns, high-load frames – S420N Structural Steel |
| Bridges | Bridge components – S420N Bridge |
| Machinery | Heavy equipment frames – S420N Machinery |
| Construction | High-strength construction – S420N Construction |
| Offshore & Industrial | Structural components – S420N Industrial |
| General Fabrication | High-strength fine-grain structures – S420N 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 S420N Steel Plate.
Customers benefit from reliable supply, short lead times and cost-effective solutions for high-strength 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 S420N 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 S420N and S420NL?Both have the same strength level. S420N is impact tested at –20°C (40 J), while S420NL is impact tested at –50°C (27 J), offering better low-temperature toughness.
- What is the material number of S420N?1.8902
- Is S420N suitable for heavier loaded structures?Yes. With a minimum yield strength of 420 MPa, S420N is designed for more demanding structural applications compared with S355 grades.
Conclusion
EN 10025-3 S420N (1.8902) Steel Plate from SHH STEEL is a normalized fine-grain structural steel offering high strength (420 MPa) 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 S420N fine grain structural steel plate requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. EN 10025-3 S420N Steel Plate, S420N steel plate, S420N fine grain structural steel, EN 10025 S420N, S420N equivalent, S420N supplier, 1.8902
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