S960QL is a high-strength structural grade. S960QL Steel Plate is designed with different chemical elements giving them superior performance and enhanced resistance. The S960ql is quenched and tempered, giving the subsequent modules enhanced strength and abrasion resistance across stress-induced systems. Structural Steel 960 shows outstanding resistance to wear and tear while showing enhanced tolerance to weathering.
The S960 material possesses superior surface quality and superb bendability in different environments. Designed with exceptional consistency, the Steel 960 exhibits high impact toughness while providing enhanced resistance against stress fracture. The versatile S960mc grade exhibits superior yield strengths of minimum 960mpa, giving it outstanding load-bearing capacity.
S960 Ql modules possess good weldability and excellent toughness with HAZ strength in the system. The Steel 960mc comes in thickness between 4mm up to 35mm. It has an impact hardness of 40J with excellent notch toughness. The S960QL High Strength Structural Steel Plate is widely used in heavy transport, mining industry, lifting material, and so on.
S960 QL Steel Plate Chemical Composition
| % | |
|---|---|
| Si | 00.80 |
| C | 00.20 |
| Mn | 1.70 |
| P | 00.020 |
| S | 00.010 |
| N | 00.015 |
| B | 00.0050 |
| Cr | 1.50 |
| Cu | 00.50 |
| Mo | 00.70 |
| Nb | 00.06 |
| Ni | 2.0 |
| Ti | 00.05 |
| V | 00.12 |
| Zr | 00.15 |
Mechanical Properties
|
Thickness of material (mm) |
Yield strength Rp0.2(min MPa) |
Tensile strength Rm(MPa) |
Elongation A5(min %) |
| 4.0 - 53.0 mm | 960 MPa | 980 - 1150 MPa | 12% |
| 53.1 - 120.0 mm | 850 MPa | 900 - 1100 MPa | 10% |
Quenched & Tempered S960QL Steel Plate Equivalent
| Material | SSAB Brand |
| S960QL | Strenx® 960 E |
| S960QL1 | Strenx® 960 F |
Key Industrial Applications
Heavy Machinery & Lifting:
Extensive use in the manufacturing of mobile cranes, crawler cranes, excavators, and dump trucks. Its high strength-to-weight ratio is critical for crane booms and chassis, allowing for longer reach and higher payloads.
Transportation:
Used in the automotive and logistics sectors for truck chassis, trailers, low loaders, and container frames to improve fuel efficiency and payload capacity.
Military Engineering:
Critical for constructing armoured vehicles, aircraft structural components, and naval vessels. It is also used in weapon systems, including missile structures and intricate firearm parts, due to its reliability in high-stress environments.
Energy & Offshore:
Found in wind turbine towers, oil rigs, drilling platforms, and hydraulic supports for coal mining. Its resistance to fatigue and mechanical shock makes it suitable for cyclic loading in harsh environments.
Infrastructure & Civil Engineering:
Utilized in high-rise buildings, bridges (tower and building members), and large-scale industrial plants where high load-bearing capacity is required.
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Which standards apply to S960QL?
S960QL is specified in the European standard for high-strength structural steels, specifically the part covering quenched and tempered fine-grained
steels. This standard defines chemical composition, mechanical properties, and testing requirements.
What are the typical mechanical properties of S960QL?
S960QL has a very high yield strength, a high tensile strength, and reasonable ductility. It also offers good impact toughness at low temperatures, which helps prevent brittle fracture in cold environments.
What is the typical chemical composition of S960QL?
S960QL generally has a low carbon content to maintain weldability, balanced manganese, and additions of alloying elements such as chromium, nickel, molybdenum, and sometimes vanadium or niobium. These elements enhance strength and toughness while maintaining a fine-grained microstructure.
Is S960QL weldable?
Yes, S960QL is weldable, but due to its high strength and alloy content, proper welding procedures are necessary. These may include preheating, controlled interpass temperatures, and appropriate consumables to avoid cold cracking and ensure good toughness in the heat-affected zone.
What is the microstructure of S960QL?
After quenching and tempering, S960QL typically has a fine-grained microstructure consisting mainly of tempered martensite or a mixture of tempered martensite and bainite. This structure provides the required combination of high strength and toughness.
In what condition is S960QL usually delivered?
S960QL is usually delivered in the quenched and tempered condition. This process involves heating, rapid cooling, and subsequent tempering to achieve the desired strength and toughness balance.
What thicknesses are available for S960QL?
S960QL is produced in a range of thicknesses from thin plates to thicker sections. As thickness increases, achieving the same level of strength and toughness becomes more challenging, requiring tighter process control.
What does the designation "S960QL" mean?
The letter S indicates structural steel, the number represents the minimum yield strength level, Q stands for quenched and tempered, and L signifies improved low-temperature toughness compared to basic grades.
What heat treatment is applied to S960QL?
S960QL undergoes quenching and tempering. Quenching forms a hard microstructure, while tempering reduces hardness and internal stresses, resulting in the desired strength–toughness balance.
What are the main applications of S960QL?
S960QL is commonly used in heavy lifting equipment such as crane booms, telescopic arms, and other high-performance structural components. It is also found in offshore structures, mining machinery, and heavy truck parts where high strength and low weight are critical.
Why is S960QL suitable for crane booms?
Its high strength allows designers to create lighter and more efficient boom structures while maintaining load-carrying capacity. This reduces overall machine weight, improves mobility, and increases lifting performance.
How does S960QL perform in low-temperature environments?
S960QL is designed to maintain good toughness at low temperatures, making it suitable for use in cold climates or offshore applications where materials must withstand impact loading without brittle failure.
What welding methods are used for S960QL?
Common methods include shielded metal arc welding, gas metal arc welding, and submerged arc welding. The choice depends on material thickness, production conditions, and required weld quality, with a qualified welding procedure specification always recommended.