S890QL is a European standard (EN 10025-6) high-strength structural steel, known for its exceptional yield strength (890 MPa), achieved through quenching and tempering (the 'Q'), and good low-temperature impact toughness (the 'L' signifies testing at -40°C). It's used in demanding applications like cranes, bridges, and heavy transport, offering strength and durability while remaining weldable and formable, allowing for lighter, stronger designs.
Key Characteristics
S: Structural Steel
890: Minimum yield strength of 890 Megapascals (MPa)
Q: Quenched and Tempered (a heat treatment process)
L: Low temperature impact toughness (tested at -40°C)
Properties & Applications
High Strength: Over three times stronger than basic structural steels, ideal for load-bearing structures.
Good Weldability: Despite its strength, it's relatively easy to weld and fabricate.
Durable: Performs well in extreme conditions due to its low-temperature impact resistance.
Applications: Cranes, mobile platforms, bridges, heavy transportation, lifting equipment, and specialized containers.
S890QL is primarily used in ultra-demanding, weight-critical applications where maximizing strength-to-weight ratio is essential, and where components must operate reliably in low-temperature environments (down to -40°C). Its use is typically limited to highly engineered, safety-critical components rather than entire structures.
Key Application Areas:
1. Heavy Lifting & Advanced Material Handling
Super-Lift Mobile Crane Booms: Critical sections of telescopic and lattice booms for the largest mobile cranes, where weight reduction directly increases lifting capacity and reach.
High-Capacity Offshore Cranes: Boom and structural parts on vessels and platforms.
Advanced Forklift Masts: For high-reach, heavy-duty models in ports and heavy industry.
2. Mining, Quarrying & Heavy Earthmoving
Drill Rig Masts & Shovel Arms: High-stress components subjected to extreme dynamic and impact loads in cold-climate mining operations.
Haul Truck Chassis & Body Frames: Key structural elements in ultra-class mining trucks to reduce dead weight and increase payload.
3. Specialized Transport & Defense
Military Vehicle Chassis & Armor Support Structures: For lightweight, high-mobility tactical and protected vehicles requiring blast resistance.
Aerospace Ground Support Equipment: Such as heavy-duty aircraft towbars and loading platforms.
High-Performance Racing Car Chassis & Roll Cages (in top-tier motorsports).
4. Advanced Engineering Structures
Offshore Mooring & Lifting Components: Critical links, pins, and connectors in deep-water oil & gas platforms and marine installations.
Specialized Bridge Components: For movable parts (e.g., lift or swing sections) in cold regions where weight reduction is crucial for mechanical systems.
High-Stress Parts in Offshore Wind Turbines: Such as specialized flanges or transition pieces in demanding environments.
Why S890QL is Selected:
Maximum Weight Reduction: Its 890 MPa yield strength allows for thinner, lighter sections while maintaining load capacity, crucial for mobile equipment where weight translates directly into performance (payload, reach, fuel efficiency).
Cold-Climate Capability: The "QL" designation ensures guaranteed impact toughness at -40°C, making it suitable for Arctic, high-altitude, or winter operations.
Space Efficiency: Enables more compact, higher-capacity designs.
Technical data
EN10025-6 S890QL quenched and tempered steel plate Chemical composition
| Grade | C % | Si % | Mn % | P % | S % | N % | B % | Cr % |
| S890QL | 0.200 | 0.800 | 1.700 | 0.020 | 0.010 | 0.015 | 0.005 | 1.500 |
| Cu % | Mo % | Nb % | Ni % | Ti % | V % | Zr % | ||
| 0.500 | 0.700 | 0.060 | 2.000 | 0.050 | 0.120 | 0.150 |
EN10025-6 S890QL quenched and tempered steel plate mechanical properties
| Grade | Thickness(mm) | Min Yield (Mpa) | Tensile(MPa) | Elongation (%) | Min Impact Energy | |
| S890QL | 8mm-50mm | Min 890Mpa | 940-1100Mpa | 11% | -40 | Min 30J |
| 51mm-100mm | Min 830Mpa | 880-1100Mpa | 11% | -40 | Min 30J | |
| 101mm-150mm | Min 800Mpa | 820-1000Mpa | 11% | -40 | Min 30J |
For more information in EN10025-6 S890QL quenched and tempered steel plate quality certificate or inquiry in competitive official quotation, please contact us.
1. What is S890QL steel?
S890QL is a very high-strength quenched and tempered structural steel with a minimum yield strength of 890 MPa, designed to maintain good toughness at low temperatures down to -40°C.
2. What are the main applications of S890QL?
It is used in ultra-heavy mobile crane booms, advanced mining drill rigs, military vehicle frames, and specialized offshore components where maximum strength-to-weight ratio is critical in cold climates.
3. How does S890QL differ from S690QL?
S890QL offers higher yield strength (890 MPa vs. 690 MPa) but lower toughness and weldability, making it suitable for more weight-critical yet more demanding applications.
4. What is the chemical composition of S890QL?
It contains low carbon, manganese, silicon, and micro-alloys like niobium, vanadium, and boron, along with nickel, chromium, and molybdenum for hardenability and toughness.
5. Can S890QL be welded easily?
No, welding S890QL is difficult and requires strict procedures: low-hydrogen consumables, preheating (often 150-200°C), controlled heat input, and usually post-weld heat treatment.
6. What standards apply to S890QL steel?
It is primarily governed by the European standard EN 10025-6 for quenched and tempered high-strength structural steels.
7. Is S890QL corrosion resistant?
No, S890QL is not corrosion-resistant and requires protective coatings such as painting, galvanizing, or specialized plating for use in corrosive environments.
8. How to machine S890QL steel?
Machining S890QL is challenging due to its high hardness; it requires robust carbide tooling, slow cutting speeds, high-pressure coolant, and rigid setup.
9. What is the price of S890QL steel plate?
S890QL is significantly more expensive than lower-grade steels, with prices varying based on thickness, quantity, and certification, often ranging from €2,500 to €4,500+ per ton.
Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff.
