S960Q is a European standard (EN 10025-6) designation for an ultra-high-strength structural steel, known for its exceptional strength (minimum yield strength of 960 MPa), toughness, and wear resistance, achieved through a quenched and tempered (Q&T) process, making it ideal for heavy-duty applications like cranes, bridges, mining equipment, and transportation chassis where weight savings and high load capacity are critical.
Chemical Properties Of s960q steel plate
|
C |
Si |
Mn |
Ni |
P |
S |
Cr |
Mo |
V |
N |
Nb |
Ti |
Cu |
Zr |
B |
CEV |
|
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 |
max 0.82 |
Mechanical Properties Of s960q steel plate
|
Designation |
Mechanical Properties (ambient temperature) |
|||||||
|
Steel Name |
Steel Number |
Min. Yield Strength Reh MPa |
Tensile Strength Rm MPa |
Min. % elongat- ion after fracture |
||||
|
Nominal thickness (mm) |
Nominal thickness (mm) |
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|
≥3 ≤50 |
≥50 ≤100 |
≥100 ≤150 |
≥3 ≤50 |
≥50 ≤100 |
≥100 ≤150 |
|||
| S960Q | 1.8941 | 960 | –– | –– | 980/1150 | –– | –– | 10 |
Key Applications by Industry
Construction & Infrastructure:
Bridges, high-rise buildings, structural components, where high strength ensures integrity.
Heavy Machinery:
Cranes, excavators, mining equipment, requiring robust parts to handle heavy loads.
Transportation:
Truck chassis, trailers, railway parts, allowing for weight reduction without compromising strength.
Offshore & Marine:
Oil rigs, platforms, benefiting from toughness and corrosion resistance in harsh environments.
Renewable Energy:
Wind turbine towers, solar panel supports, enabling lighter, more efficient designs.
General Engineering:
Applications needing high performance in demanding conditions, including fertilizer, petrochemical, and paper industries.
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What does the designation "S960Q" mean?
The "S" indicates structural steel, the number represents a very high minimum yield strength level, and "Q" signifies that the steel is supplied in the quenched and tempered condition.
What is the typical delivery condition of S960Q?
S960Q is usually delivered in the quenched and tempered (Q&T) condition to achieve its combination of high strength and toughness.
Is S960Q suitable for cold-forming operations?
S960Q has limited cold-formability due to its high strength, so forming is often performed at room temperature with careful control of bending radii and avoiding excessive strain.
What quality control tests are commonly performed on S960Q?
Common tests include tensile testing, Charpy impact testing at low temperatures, hardness testing, ultrasonic inspection, and examination of microstructure.
What is the typical microstructure of S960Q?
S960Q generally has a fine-grained microstructure, often consisting of tempered martensite or a mixture of martensite and bainite, which provides high strength and toughness.
How does the thickness of S960Q affect its properties?
As thickness increases, the achievable strength and toughness tend to decrease, so thicker plates may have lower specified strength levels and require more stringent welding procedures.
How does S960Q compare to S690Q in terms of strength?
S960Q has a significantly higher yield strength than S690Q, making it suitable for even more demanding load-bearing applications where weight reduction is critical.
What is the difference in toughness between S960Q and quenched and tempered carbon steels?
S960Q typically offers better low-temperature toughness than conventional quenched and tempered carbon steels due to its refined microstructure and optimized alloy content.
How does the weldability of S960Q compare to that of lower-strength structural steels?
S960Q has more demanding welding requirements than lower-strength steels, often requiring higher preheat temperatures and stricter control of hydrogen to prevent cracking.
How does S960Q differ from ASTM A514 in terms of application?
Both are high-strength quenched and tempered steels, but S960Q is commonly used in European and global heavy machinery, while A514 is more typical in North American construction and equipment.