EN 10025-6 S960Q Steel Plate | S960Q QT High Structural Steel
General Description
SHH STEEL is a professional China Mill-Direct Exporter of high-strength structural steel plates. We are pleased to offer EN 10025-6 S960Q Steel Plate (Material Number 1.8941), the highest strength quenched and tempered grade in the EN 10025-6 series.
S960Q belongs to the family of EN 10025-6 steel plate products covering high-yield-strength steels in the quenched and tempered condition. After quenching and tempering, this grade achieves a minimum yield strength of 960 MPa (up to 50 mm thickness) while maintaining adequate impact toughness at –20°C. The refined tempered microstructure delivers exceptional strength, enabling maximum weight reduction in mobile cranes, telescopic booms, heavy lifting equipment and other structures where every kilogram counts.
SHH STEEL supplies S960Q plates in thicknesses ranging from 6 mm to 100 mm (availability of thicker plates is limited and subject to mill capability), widths up to 3000–4000 mm and lengths up to 12000–18000 mm. Custom cutting, ultrasonic testing, surface treatment and third-party inspection services are available. Every plate is delivered with a full EN 10204 3.1 Mill Test Certificate, ensuring complete traceability from the producing mill.
Material Specification
| Parameter | Requirement / Availability |
|---|---|
| Governing Standard | EN 10025-6 |
| Steel Designation | S960Q (1.8941) |
| Delivery Condition | Quenched and Tempered (Q) |
| Product Form | Flat steel plate |
| Thickness Range | 6 mm – 100 mm (thicker plates limited) |
| Width / Length | Up to 3000–4000 mm / 12000–18000 mm |
| Certification | EN 10204 3.1 / 3.2 |
| Additional Testing | UT, Z-test, third-party inspection available |
Chemical Composition
Chemical composition is controlled in accordance with EN 10025-6 for both ladle (heat) analysis and product analysis.
Ladle Analysis (Cast Analysis)
| Element | Maximum (%) |
|---|---|
| Carbon (C) | 0.20 |
| Silicon (Si) | 0.80 |
| Manganese (Mn) | 1.70 |
| Phosphorus (P) | 0.025 |
| Sulfur (S) | 0.015 |
| Chromium (Cr) | 1.50 |
| Nickel (Ni) | 2.00 |
| Molybdenum (Mo) | 0.70 |
| Copper (Cu) | 0.50 |
| Niobium (Nb) | 0.06 |
| Vanadium (V) | 0.12 |
| Titanium (Ti) | 0.05 |
| Boron (B) | 0.005 |
| Nitrogen (N) | 0.015 |
Product Analysis
| Element | Maximum (%) |
|---|---|
| Carbon (C) | 0.22 |
| Silicon (Si) | 0.86 |
| Manganese (Mn) | 1.80 |
| Phosphorus (P) | 0.030 |
| Sulfur (S) | 0.017 |
| Chromium (Cr) | 1.60 |
| Nickel (Ni) | 2.10 |
| Molybdenum (Mo) | 0.74 |
| Copper (Cu) | 0.55 |
| Niobium (Nb) | 0.07 |
| Vanadium (V) | 0.14 |
| Titanium (Ti) | 0.06 |
| Boron (B) | 0.006 |
| Nitrogen (N) | 0.016 |
The carefully balanced alloying system ensures the high hardenability required to achieve 960 MPa yield strength while keeping the carbon equivalent at a level that still permits controlled welding after quenching and tempering.
Mechanical Properties
| Nominal Thickness (mm) | Min. Yield Strength ReH | Tensile Strength Rm | Min. Elongation A | Impact Energy (longitudinal) |
|---|---|---|---|---|
| ≤ 50 | 960 MPa | 980 – 1150 MPa | 10 % | 30 J at –20 °C |
| 50 < t ≤ 100 | 900 MPa | 940 – 1100 MPa | 10 % | 30 J at –20 °C |
Density is approximately 7.85 g/cm³.
Delivery Conditions
All S960Q plates are supplied in the quenched and tempered condition as required by EN 10025-6. The quenching and tempering heat treatment is precisely controlled to achieve the ultra-high strength and required toughness.
Additional processing options available from SHH STEEL:
- Shot blasting and shop primer application
- Ultrasonic testing in accordance with EN 10160
- Through-thickness (Z-direction) testing to Z15, Z25 or Z35
- Independent third-party inspection (SGS, BV, TUV, Lloyd’s Register, etc.)
- Precision cutting (flame, plasma or water-jet)
Tolerances
EN 10025-6 S960Q Steel Plate dimensional tolerances are supplied in accordance with EN 10029. For S960Q QT High Structural Steel, customers may select the required class for thickness, width, length and flatness according to project needs. Both mill edges and cut edges (flame or plasma) are available for S960Q steel plate. Tighter tolerances for EN 10025-6 S960Q can be arranged by special agreement when required.
Weldability
S960Q is an ultra-high-strength quenched and tempered steel. Welding requires extremely strict control of preheating, heat input and the exclusive use of matching low-hydrogen ultra-high-strength consumables to maintain toughness in the heat-affected zone.
Recommended welding consumables:
| Welding Process | Suggested Consumables |
|---|---|
| SMAW (Stick) | E12018-G, E13018-G |
| GMAW / MAG | ER120S-G, ER130S-G |
| FCAW | E121T1-G, E131T1-G |
| SAW | Matching ultra-high-strength wire and flux combinations |
Preheating is mandatory. Interpass temperature must be tightly controlled, and post-weld heat treatment is frequently required for critical or highly stressed components. Welding procedures should be carefully qualified.
Equivalent Material Grades
| Grade | Standard | Remarks |
|---|---|---|
| S960Q | EN 10025-6 | Primary designation |
| 1.8941 | EN | Material number |
| Q960D / Q960E | GB/T 1591 | Closest Chinese equivalents |
| Weldox 960 / Strenx 960 | SSAB | Similar ultra-high-strength QT concept |
| StE 960 V | Former DIN | Historical related grade |
Applications
EN 10025-6 S960Q is selected when the absolute maximum strength and maximum weight reduction are required. Typical applications include:
| Application Area | Typical Components / Keywords |
|---|---|
| Mobile Cranes & Lifting | Boom structures, telescopic arms – S960Q Crane |
| Heavy Construction | Ultra-high-load frames – S960Q Structural Steel |
| Mining & Earthmoving Equipment | Chassis, boom structures – S960Q Mining |
| Offshore & Marine | Lifting equipment – S960Q Offshore |
| Energy & Power | Special high-strength fabrications – S960Q Energy |
| General Heavy Fabrication | Ultra-high-strength welded assemblies – S960Q 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 agent. This direct supply model allows us to offer competitive mill-direct pricing, shorter lead times, consistent quality and full Mill Test Certificates (EN 10204 3.1 / 3.2) for EN 10025-6 S960Q Steel Plate.
Our experienced export and technical teams provide support on material selection, welding procedures, cutting and processing. Customers benefit from reliable supply and professional service for the highest strength quenched and tempered steel projects worldwide.
FAQ
- What does “Q” mean in S960Q?“Q” indicates the quenched and tempered condition and impact testing at –20°C.
- What is the difference between S960Q and S960QL?Both grades have the same strength level. S960Q is impact tested at –20°C, while S960QL is tested at –40°C and offers higher toughness for colder service.
Conclusion
EN 10025-6 S960Q (1.8941) quenched and tempered steel plate from SHH STEEL provides the highest yield strength of 960 MPa in the EN 10025-6 series combined with reliable toughness at –20°C. As a China Mill-Direct Exporter, we offer competitive pricing, consistent quality and full technical support. Contact SHH STEEL today for stock availability, pricing or processing services.
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