EN 10025-6 S460Q Steel Plate | S460Q QT High Structural Steel
What is EN 10025-6 S460Q Steel Plate?
SHH STEEL supplies high-performance structural steel plates as a China Mill-Direct Exporter. Our EN 10025-6 S460Q Steel Plate (Material Number 1.8908) is produced under the quenched and tempered route to achieve high strength while retaining adequate toughness.
This grade forms part of the EN 10025-6 steel plate series covering high-yield-strength steels in the quenched and tempered condition. After quenching and tempering, S460Q reaches a minimum yield strength of 460 MPa in thicknesses up to 50 mm and maintains reliable Charpy values at –20°C. The refined microstructure resulting from the QT process provides a favourable combination of strength, ductility and weldability for heavily loaded structures.
Standard supply covers thicknesses from 6 mm to 150 mm, widths up to 3000–4000 mm and lengths up to 12000–18000 mm. Cutting, surface treatment and testing services are available on request. All material is accompanied by EN 10204 3.1 certificates.
Material Specification
| Parameter | Requirement / Availability |
|---|---|
| Governing Standard | EN 10025-6 |
| Steel Designation | S460Q (1.8908) |
| Condition of Supply | Quenched + Tempered |
| Form | Flat plate |
| Thickness Capability | 6 mm – 150 mm |
| Certification | EN 10204 3.1 or 3.2 |
Chemical Composition
Ladle analysis limits according to EN 10025-6:
| Element | Max. Limit (%) |
|---|---|
| C | 0.20 |
| Si | 0.80 |
| Mn | 1.70 |
| P | 0.025 |
| S | 0.015 |
| Cr | 1.50 |
| Ni | 2.00 |
| Mo | 0.70 |
| Cu | 0.50 |
| Nb | 0.06 |
| V | 0.12 |
| Ti | 0.05 |
| B | 0.005 |
| N | 0.015 |
Product analysis values are permitted to be slightly higher. The carefully balanced alloy content supports hardenability during quenching while keeping the carbon equivalent within a weldable range.
Mechanical Properties
| Nominal Thickness (mm) | Min. Yield Strength ReH | Tensile Strength Rm | Min. Elongation | Impact Energy (long.) |
|---|---|---|---|---|
| ≤ 50 | 460 MPa | 550 – 720 MPa | 17 % | 30 J at –20 °C |
| 50 < t ≤ 100 | 440 MPa | 550 – 720 MPa | 17 % | 30 J at –20 °C |
| 100 < t ≤ 150 | 400 MPa | 500 – 670 MPa | 17 % | 30 J at –20 °C |
Density is approximately 7.85 g/cm³.
Delivery Conditions
Material is supplied exclusively in the quenched and tempered condition as defined by the standard. Optional processing offered by SHH STEEL includes shot blasting, shop priming, ultrasonic examination to EN 10160, through-thickness testing (Z15/Z25/Z35) and independent third-party inspection.
Tolerances
Dimensional accuracy follows EN 10029. Thickness, width, length and flatness tolerances can be selected according to the required class. Both mill edges and cut edges (flame or plasma) are available.
Weldability
S460Q can be welded successfully provided appropriate procedures are observed. Because of its higher strength level, preheating of thicker sections and the use of low-hydrogen consumables are normally required.
Typical consumable recommendations:
| Welding Process | Suitable Filler Materials |
|---|---|
| SMAW | E8018-G / E7018 |
| GMAW | ER80S-G / ER70S-6 |
| FCAW | E81T1-Ni1 / E71T-1 |
| SAW | Matching high-strength wire-flux pairs |
Heat-input control and interpass temperature management help preserve toughness in the heat-affected zone.
Equivalent Material Grades
| Designation | Reference Standard | Comment |
|---|---|---|
| S460Q | EN 10025-6 | Primary grade |
| 1.8908 | EN | Numerical designation |
| Q460D / Q460E | GB/T 1591 | Nearest Chinese equivalents |
| Selected A514 / A517 | ASTM | Comparable QT concept |
| StE 460 V | Former German standard | Historical reference |
Applications
| Industry Sector | Common Components |
|---|---|
| Heavy Construction | Crane structures, heavy frames, columns |
| Bridge Engineering | Main girders and supporting members |
| Mining & Earthmoving | Chassis and boom assemblies |
| Offshore & Energy | Lifting equipment and platform elements |
| General Heavy Fabrication | High-strength welded fabrications |
Why Choose SHH STEEL
As a China Mill-Direct Exporter, SHH STEEL maintains long-term relationships with major domestic producers. This enables us to offer competitive mill pricing, short lead times and full traceability for EN 10025-6 S460Q Steel Plate. Every shipment is supported by EN 10204 3.1 or 3.2 documentation. Our technical team can assist with welding recommendations, processing advice and project-specific requirements.
FAQ
- What does the letter “Q” stand for in S460Q?It indicates the quenched and tempered delivery condition together with impact testing at –20 °C.
- How does S460Q compare with S460QL?S460QL is tested at –40 °C and provides higher impact energy values for more severe low-temperature service.
- Can thicker plates be supplied?Yes. Dimensions outside the regular range can be arranged to meet project needs.
Conclusion
EN 10025-6 S460Q (1.8908) quenched and tempered steel plate from SHH STEEL provides 460 MPa minimum yield strength and dependable toughness at –20 °C. Backed by direct mill supply, competitive pricing and complete certification, it is a reliable choice for high-strength structural applications. Contact SHH STEEL for current stock, pricing or technical support.
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