S890QL is a European standard (EN 10025-6) high-strength structural steel known for its exceptional strength (minimum 890 MPa yield strength), toughness, and good weldability, achieved through quenching and tempering. The 'S' denotes structural steel, '890' its yield strength, 'Q' its quenched & tempered condition, and 'L' indicates low-temperature notch toughness (typically -40°C). It's used in heavy machinery, cranes, bridges, and structural components where weight reduction and high performance are critical.
Chemical Composition of S890QL
| % | |
|---|---|
| C | 0.20 |
| Si | 0.80 |
| Mn | 1.70 |
| P | 0.020 |
| S | 0.010 |
| N | 0.015 |
| B | 0.0050 |
| Cr | 1.50 |
| Cu | 0.50 |
| Mo | 0.70 |
| Nb | 0.06 |
| Ni | 2.0 |
| Ti | 0.05 |
| V | 0.12 |
| Zr | 0.15 |
Mechanical Properties of S890QL
| Designation | Mechanical Properties (ambient temperature) | |||||||
|---|---|---|---|---|---|---|---|---|
| Steel Name | Steel Number | Min. Yield Strength ReH MPa | Tensile Strength Rm MPa | Min. & elongation after fracture | ||||
| Nominal thickness (mm) | Nominal thickness (mm) | |||||||
| >3 <50 | >50 <100 | >100 <150 | >3 <50 | >50 <100 | >100 <150 | |||
| S890QL | 1.8983 | 890 | 830 | -- | 940/1100 | 880/1100 | -- | 11 |
V Notch Impact Testing
| Grade | Sample Orientation | @ 0 Deg C | @ -20 Deg C | @ -40 Deg C | @ -60 Deg C |
|---|---|---|---|---|---|
| S890QL | Longitudinal | 50J | 40J | 30J | |
| Transverse | 35J | 30J | 27J |
Core Properties & Technical Parameters
Material Type: High-Strength Low-Alloy (HSLA) structural steel. Its performance is optimized by precisely adding microalloying elements (such as niobium, vanadium, and titanium), balancing high strength and excellent toughness. Different from ordinary carbon steel, it has significant advantages in scenarios requiring lightweight design.
Standard & Mechanical Properties: Produced in strict compliance with EN 10025-6 standard, it has a minimum yield strength of 890 MPa (for thinner plates) and a tensile strength range of 940-1100 MPa. It can withstand extreme loads and mechanical stresses, making it suitable for heavy-duty working conditions.
Heat Treatment & Toughness: Processed by Quenching and Tempering (Q&T) technology, it refines the grain structure and improves material stability. It possesses excellent low-temperature impact toughness, maintaining good impact resistance even at -40°C, thus adapting to operation requirements in alpine regions.
Weldability: By precisely controlling the carbon equivalent and alloy composition ratio, it avoids the welding cracking problem common in high-strength steel. No complex preheating treatment is required during welding, reducing construction difficulty and welding costs, and it is suitable for on-site welding operations.
Main Application Scenarios
Lifting Equipment: Widely used in load-bearing components of mobile cranes, loader cranes, aerial work platforms and other equipment. It ensures the lifting stability of equipment with its high load-bearing capacity and reduces the impact of component weight on the operating radius.
Heavy Machinery: Suitable for high-frequency heavy-duty equipment such as earth-moving machinery and mining machinery. It can be used to manufacture core components like buckets, frames and track shoes, resisting wear and impact loads in mining and infrastructure scenarios, and extending the service life of equipment.
Transportation: Applied to heavy-duty trailers, commercial vehicle frames and load-bearing parts. While ensuring transportation safety, it reduces vehicle weight, improves fuel economy and load efficiency, meeting the needs of long-distance heavy-duty transportation.
Construction Engineering: Suitable for bridge load-bearing structures, high-strength steel structure workshops, special containers, etc. It can reduce the cross-sectional size of components, save space and materials, and adapt to the design requirements of large-span and high-load buildings.
Core Advantages
High Strength-to-Weight Ratio: Under the same load-bearing requirement, compared with ordinary steel, it can significantly reduce the thickness of components to achieve lightweight design. This not only reduces raw material consumption but also lowers subsequent fabrication costs such as cutting and welding, improving production efficiency.
Cost-Effectiveness: It achieves efficient strengthening through process optimization and composition control without relying on a large number of precious alloys. Compared with special steel of the same strength level, it has lower procurement and processing costs, showing obvious cost-performance advantages.
Wide Versatility: It has good machinability, bendability and weldability, and can be processed into complex structural components according to the needs of different scenarios. No special equipment or processes are required, making it suitable for multi-field applications such as lifting, machinery and construction.
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.
What is the difference between S890QL and S690QL?
S890QL has a higher yield strength (890 MPa vs 690 MPa) than S690QL, suitable for more demanding load-bearing scenarios with stricter strength requirements.
Is S890QL magnetic?
Yes, as a ferritic steel, S890QL is magnetic, which should be considered in applications sensitive to magnetic fields, such as electronic equipment.
What surface treatments can be applied to S890QL?
Common treatments include painting, powder coating, galvanizing, and phosphating, which improve corrosion resistance and extend service life.
Can S890QL be used in high-temperature environments?
It is suitable for moderate temperatures (up to 200℃). Beyond this range, its mechanical properties may decrease, requiring heat-resistant steels instead.
What is the delivery condition of S890QL?
It is delivered in quenched and tempered (Q&T) condition, ensuring stable mechanical properties and consistent performance across the entire batch.
How to test the mechanical properties of S890QL?
Tests include tensile test, impact test, hardness test, and bending test, conducted in accordance with EN 10025-6 to verify compliance with standards.
Can S890QL be used in crane manufacturing?
Absolutely, it is a preferred material for crane booms, jibs, and frames, as its high strength reduces weight while ensuring load-bearing capacity.
What is the elongation at break of S890QL?
The minimum elongation at break is 12% (for thickness ≤16 mm), ensuring a certain degree of ductility to avoid brittle fracture under impact.
Does S890QL have good fatigue resistance?
Yes, its quenched and tempered structure provides good fatigue resistance, suitable for components subjected to repeated loads, like machinery shafts.
What is the price trend of S890QL?
Its price fluctuates with raw material costs (iron ore, alloy elements) and market demand, usually higher than conventional structural steels due to its performance.
Can S890QL be replaced by other steels?
For lower load requirements, S690QL or S700MC can be alternatives. But for high-strength demands, S890QL is irreplaceable in many heavy engineering applications.