S890QL1 is an ultra-high-strength structural steel primarily used to achieve significant weight savings and higher payloads in load-bearing applications. , its use is critical in sectors where extreme mechanical properties and low-temperature performance (down to -60°C) are required.
S890ql1 steel plate Properties
|
C |
Si |
Mn |
Ni |
P |
S |
Cr |
Mo |
V |
N |
Nb |
Ti |
Cu |
Zr |
B |
|
max 0.2 |
max 0.8 |
max 1.7 |
max 2 |
max 0.025 |
max 0.015 |
max 1.5 |
max 0.7 |
max 0.12 |
max 0.015 |
max 0.06 |
max 0.05 |
max 0.5 |
max 0.15 |
max 0.005 |
Mechanical Properties Of S890ql1 steel plate
|
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 |
|||
|
S890QL1 |
1.8925 |
890 |
830 |
–– |
940/1100 |
880/1100 |
–– |
11 |
Notch Impact Energy
|
Grade |
Sample Orientation |
@ 0°C |
@-20°C |
@-40°C |
@-60°C |
|
S890QL1 |
Longitudinal |
60 J |
50 J |
40 J |
30 J |
|
Transverse |
40 J |
35 J |
30 J |
27 J |
1. Processing
Processing S890QL1 requires strict adherence to its quenched and tempered (Q+T) state to prevent the loss of its 890 MPa yield strength.
Welding: It is highly weldable but sensitive to heat. Preheating to 150–250°C is typically required for thicker plates to avoid cold cracking. Using low-hydrogen filler materials (HD < 5ml/100g) is essential to maintain the integrity of the Heat Affected Zone (HAZ).
Cutting : Suitable for thermal cutting methods including laser, plasma, and oxy-fuel. Laser-aided forming and precision cutting are increasingly used in 2026 to ensure tighter tolerances.
Cold Forming : Despite its extreme strength, it offers superior bendability. Minimum bending radii are generally 3x to 4x the plate thickness to avoid surface fractures.
Machining (机加工: Due to high hardness, carbide-tipped tools and stable, rigid setups are necessary to prevent tool wear and work hardening.
2. Applications
S890QL1 is utilized in demanding load-bearing environments where weight reduction and cold-weather durability are critical.
Lifting & Transport: Mobile crane booms, aerial platforms, and derrick structures. It allows for longer crane reaches and higher payloads on heavy-duty truck chassis.
Mining & Construction: Dipper sticks and bucket components for excavators, and structural beams for high-rise skyscrapers.
Offshore & Energy: Penstocks, pressure vessels, and offshore platforms that operate in Arctic conditions, as it maintains toughness down to -60°C.
Infrastructure : Increased use in high-load bridge components and green-lit pipeline projects for 2026.
3. Advantages
The primary value of S890QL1 lies in its efficiency and extreme environmental resistance.
Weight Reduction: Its yield strength is roughly 30% higher than S690QL, enabling engineers to use thinner plates. This reduces the overall weight of a structure by up to 40% compared to conventional steel.
Extreme Low-Temperature Toughness: Unlike standard "Q" or "QL" grades, the "L1" designation guarantees impact energy resistance at temperatures as low as -60°C, making it safer for polar and high-altitude use.
Cost-Effectiveness: Although the initial material cost is higher, the "leaner build" reduces foundation requirements, transportation costs, and total welding time, leading to lower overall project expenses.
Predictable Performance: Modern manufacturing (like Strenx® 900 F) provides tight flatness and thickness tolerances, ensuring precision in automated prefabrication.
For more details about GNEE's steel products, contact us at beam@gneesteelgroup.com. We look forward to working with you.
What is S890QL1?
S890QL1 is a high-strength quenched and tempered structural steel. It belongs to the EN 10025-6 standard, featuring excellent weldability and toughness, widely used in heavy machinery and engineering structures.
What is the minimum yield strength of S890QL1?
The minimum yield strength of S890QL1 is 890 MPa. This high strength enables it to withstand heavy loads, making it suitable for manufacturing load-bearing components in harsh working environments.
Which standard does S890QL1 comply with?
S890QL1 complies with the European standard EN 10025-6, which specifies technical requirements for high-strength structural steels for quenched and tempered conditions, ensuring consistent quality and performance.
What is the typical tensile strength range of S890QL1?
The typical tensile strength range of S890QL1 is 940-1100 MPa. This range balances strength and ductility, allowing the steel to resist deformation and fracture under high tensile forces.
Does S890QL1 have corrosion resistance?
S890QL1 has moderate atmospheric corrosion resistance. For harsh corrosive environments, additional protection like painting, galvanizing, or coating is recommended to extend service life.
What is the difference between S890QL1 and S890QL?
The main difference is impact toughness: S890QL1 has a minimum impact energy of 30 J at -20°C, while S890QL has 40 J. Both meet EN 10025-6 but suit different low-temperature requirements.
Can S890QL1 be cold-formed?
S890QL1 can be cold-formed with caution. Due to its high strength, it has lower ductility than mild steel, so gradual forming and proper tooling are needed to avoid cracking.
What is the density of S890QL1?
The density of S890QL1 is approximately 7.85 g/cm³, the same as most carbon and low-alloy steels. This allows for accurate weight calculation in component design.
Is S890QL1 weldable?
Yes, S890QL1 has good weldability. Proper preheating and post-weld heat treatment are recommended to avoid cold cracking, ensuring the welded joints maintain the steel's original strength and toughness.