EN 10025-6 S890QL1 Steel Plate | S890QL1 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 S890QL1 Steel Plate (Material Number 1.8925), a quenched and tempered ultra-high-strength grade engineered for the most demanding structural applications that require both maximum strength and exceptional low-temperature toughness.
S890QL1 belongs to the family of EN 10025-6 steel plate products covering high-yield-strength steels in the quenched and tempered condition. The “QL1” designation indicates the most stringent impact requirement within the S890 series, with testing performed at –60°C. This makes the grade particularly suitable for structures exposed to arctic or extremely cold service conditions. After quenching and tempering, the steel develops a fine-grained tempered microstructure that delivers a minimum yield strength of 890 MPa (up to 50 mm thickness) together with high Charpy-V toughness at very low temperature. This combination enables significant weight reduction in mobile cranes, heavy lifting equipment and other critical structures operating in extreme environments.
SHH STEEL supplies S890QL1 plates in thicknesses ranging from 6 mm to 100 mm (thicker plates available on request), 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 | S890QL1 (1.8925) |
| Delivery Condition | Quenched and Tempered (Q) |
| Product Form | Flat steel plate |
| Thickness Range | 6 mm – 100 mm (thicker plates on request) |
| 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. The QL1 grade features tighter limits on phosphorus and sulphur to support superior low-temperature toughness.
Ladle Analysis (Cast Analysis)
| Element | Maximum (%) |
|---|---|
| Carbon (C) | 0.20 |
| Silicon (Si) | 0.80 |
| Manganese (Mn) | 1.70 |
| Phosphorus (P) | 0.020 |
| Sulfur (S) | 0.010 |
| 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) | 0.025 |
| Sulfur (S) | 0.012 |
| 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 restricted impurity levels and controlled alloying contribute to the excellent toughness performance at –60°C while maintaining acceptable weldability after quenching and tempering.
Mechanical Properties
| Nominal Thickness (mm) | Min. Yield Strength ReH | Tensile Strength Rm | Min. Elongation A | Impact Energy (longitudinal) |
|---|---|---|---|---|
| ≤ 50 | 890 MPa | 940 – 1100 MPa | 11 % | 30 J at –60 °C |
| 50 < t ≤ 100 | 830 MPa | 880 – 1100 MPa | 11 % | 30 J at –60 °C |
Density is approximately 7.85 g/cm³. Transverse impact values are also specified in the standard and can be provided when required by the project.
Delivery Conditions
All S890QL1 plates are supplied in the quenched and tempered condition as required by EN 10025-6. The quenching and tempering heat treatment is carefully controlled to achieve the ultra-high strength and exceptional low-temperature 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 S890QL1 Steel Plate dimensional tolerances are supplied in accordance with EN 10029. For S890QL1 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 S890QL1 steel plate. Tighter tolerances for EN 10025-6 S890QL1 can be arranged by special agreement when required.
Weldability
S890QL1 is an ultra-high-strength quenched and tempered steel. Welding requires strict control of preheating, heat input and the exclusive use of matching low-hydrogen high-strength consumables to maintain toughness in the heat-affected zone, especially for extreme low-temperature service.
Recommended welding consumables:
| Welding Process | Suggested Consumables |
|---|---|
| SMAW (Stick) | E11018-G, E12018-G |
| GMAW / MAG | ER110S-G, ER120S-G |
| FCAW | E111T1-G, E121T1-G |
| SAW | Matching ultra-high-strength wire and flux combinations |
Preheating is mandatory for most thicknesses. Interpass temperature must be carefully controlled, and post-weld heat treatment is frequently required for critical applications operating at very low temperatures.
Equivalent Material Grades
| Grade | Standard | Remarks |
|---|---|---|
| S890QL1 | EN 10025-6 | Primary designation |
| 1.8925 | EN | Material number |
| Q890F | GB/T 1591 | Closest Chinese equivalent |
| A514 / Weldox 900 | ASTM / SSAB | Similar ultra-high-strength QT concept |
| TStE 890 V | Former DIN | Historical related grade |
Applications
EN 10025-6 S890QL1 is selected when maximum strength, weight reduction and outstanding performance at extremely low temperatures are required. Typical applications include:
| Application Area | Typical Components / Keywords |
|---|---|
| Mobile Cranes & Lifting | Boom structures, telescopic arms – S890QL1 Crane |
| Heavy Construction | High-load frames, columns – S890QL1 Structural Steel |
| Mining & Earthmoving Equipment | Chassis, boom structures – S890QL1 Mining |
| Offshore & Arctic Structures | Lifting equipment, platform components – S890QL1 Offshore |
| Extreme Low-Temperature Service | Structures requiring –60°C toughness – S890QL1 Low Temperature |
| Energy & Power | Heavy fabrications, special structures – S890QL1 Energy |
| General Heavy Fabrication | Critical ultra-high-strength welded assemblies – S890QL1 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 S890QL1 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 ultra-high-strength quenched and tempered steel projects requiring superior low-temperature performance.
FAQ
- What does “QL1” mean in S890QL1?“Q” indicates the quenched and tempered condition, while “L1” means the steel meets the highest impact energy requirements at –60°C within the S890 series.
- What is the difference between S890QL and S890QL1?Both grades have the same strength level. S890QL is impact tested at –40°C, whereas S890QL1 is tested at –60°C and is intended for more severe low-temperature service.
Conclusion
EN 10025-6 S890QL1 (1.8925) quenched and tempered steel plate from SHH STEEL combines an ultra-high yield strength of 890 MPa with outstanding toughness at –60°C. As a China Mill-Direct Exporter, we provide competitive pricing, reliable quality and full technical support. Contact SHH STEEL today for stock availability, pricing or processing services.
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