EN 10025-4 S420M Steel Plate | S420M Fine Grain Structural Steel
What is EN 10025-4 S420M Steel Plate?
As a professional steel plate supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present EN 10025-4 S420M Steel Plate (Material Number: 1.8825).
S420M is a thermomechanically rolled (TMCP) weldable fine-grain structural steel under the European standard EN 10025-4. 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 TMCP grade offers excellent weldability due to its low carbon equivalent and is suitable for heavily loaded structural applications. SHH STEEL sources this material directly from leading Chinese steel mills, ensuring competitive mill-direct pricing, stable quality and reliable delivery.
We supply S420M steel plate in thicknesses from 6 mm to 120 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 10025-4 S420M steel plate is produced in accordance with EN 10025-4.
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | EN 10025-4 | Full compliance |
| Steel Grade | S420M (1.8825) | Confirmed |
| Delivery Condition | Thermomechanically rolled (M) | Confirmed |
| Product Form | Steel Plate | Available |
| Thickness Range | 6 mm – 120 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 10025-4, the chemical composition is specified for both ladle analysis (cast analysis) and product analysis.
Ladle Analysis (Cast Analysis)
| Element | Max. / Range (%) |
|---|---|
| Carbon (C) | ≤ 0.16 |
| Silicon (Si) | ≤ 0.50 |
| Manganese (Mn) | ≤ 1.70 |
| 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) | ≤ 0.80 |
| Molybdenum (Mo) | ≤ 0.20 |
| Copper (Cu) | ≤ 0.55 |
| Nitrogen (N) | ≤ 0.025 |
Product Analysis
| Element | Max. / Range (%) |
|---|---|
| Carbon (C) | ≤ 0.18 |
| Silicon (Si) | ≤ 0.55 |
| Manganese (Mn) | ≤ 1.80 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.030 |
| Niobium (Nb) | ≤ 0.06 |
| Vanadium (V) | ≤ 0.14 |
| Aluminium (Al total) | ≥ 0.015 |
| Titanium (Ti) | ≤ 0.06 |
| Chromium (Cr) | ≤ 0.35 |
| Nickel (Ni) | ≤ 0.85 |
| Molybdenum (Mo) | ≤ 0.23 |
| Copper (Cu) | ≤ 0.60 |
| Nitrogen (N) | ≤ 0.027 |
Note:
- The minimum Al content does not apply if sufficient other nitrogen-binding elements are present.
- Carbon Equivalent (CEV) is controlled to ensure good weldability.
Mechanical Properties
Mechanical properties of EN 10025-4 S420M (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 | 500 – 660 MPa | 19% | 40 J at –20°C |
| > 63 ≤ 80 | 380 MPa | 480 – 640 MPa | 19% | 40 J at –20°C |
| > 80 ≤ 100 | 370 MPa | 470 – 630 MPa | 19% | 40 J at –20°C |
| > 100 ≤ 120 | 365 MPa | 460 – 620 MPa | 19% | 40 J at –20°C |
Density: 7.85 g/cm³
Delivery Conditions
SHH STEEL, as a China Mill-Direct Supplier, supplies EN 10025-4 S420M steel plate in the thermomechanically rolled (M) 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 S420M 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
S420M has good weldability for a higher-strength thermomechanically rolled fine-grain 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 may be required for thicker plates. Low-hydrogen consumables and controlled heat input are recommended.
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| S420M | EN 10025-4 | — |
| 1.8825 | EN | Material number |
| Q420M / Q420MD | GB/T 1591 | Closest Chinese equivalents |
| A572 Grade 60 (approx.) | ASTM | Similar strength level |
| StE 420 TM | DIN (old) | Former designation |
Applications
EN 10025-4 S420M 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 – S420M Structural Steel |
| Bridges | Bridge components – S420M Bridge |
| Machinery | Heavy equipment frames – S420M Machinery |
| Construction | High-strength construction – S420M Construction |
| Offshore & Industrial | Structural components – S420M Industrial |
| General Fabrication | High-strength fine-grain structures – S420M 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 10025-4 S420M Steel Plate.
Customers benefit from reliable supply, short lead times and cost-effective solutions for high-strength thermomechanically rolled 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 “M” in S420M mean?“M” indicates that the steel is supplied in the thermomechanically rolled condition and meets impact requirements of minimum 40 J at –20°C.
- What is the difference between S420M and S420ML?oth are thermomechanically rolled. S420M is impact tested at –20°C (40 J), while S420ML is impact tested at –50°C (27 J), offering better low-temperature toughness.
- What is the advantage of S420M compared with S420N?S420M (TMCP) generally has lower carbon equivalent and better weldability than the normalized grade S420N.
Conclusion
EN 10025-4 S420M (1.8825) Steel Plate from SHH STEEL is a thermomechanically rolled fine-grain structural steel offering high strength (420 MPa), 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 S420M fine grain structural steel plate requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. EN 10025-4 S420M Steel Plate, S420M steel plate, S420M fine grain structural steel, EN 10025 S420M, S420M equivalent, S420M supplier, 1.8825
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