S960q Steel Plates | GNEE Steel

Ultra-high strength: Yield strength ≥960MPa, tensile strength 980-1150MPa, far exceeding ordinary structural steel.

Excellent toughness: Elongation after fracture ≥10%, impact energy at -20℃ ≥27J, adapting to structural deformation under complex stress conditions.

Low-temperature adaptability: Some variants (e.g., S960QL) still maintain impact energy ≥40J at -40℃, suitable for extremely cold regions.

Wear resistance and fatigue resistance: Wear resistance improved by more than 40% compared to ordinary steel, fatigue life extended by 3 times, significantly increasing the service life of high-frequency friction components.

Steelmaking:

Using scrap steel, pig iron, and molten iron as raw materials, initially smelted in an electric furnace (100-ton class) or converter to ensure controllable composition.

Adjusting alloy composition in an LF furnace refining to reduce sulfur and phosphorus content (P ≤0.025%, S ≤0.015%).

VD/VOD vacuum degassing treatment to reduce hydrogen and oxygen content, avoiding internal defects in steel plates.

Billet Forming:

Continuous casting or mold casting to form large-section steel billets, with surface cleaning to ensure no cracks, inclusions, or other defects.

Rolling:

Slabs are uniformly heated to approximately 1200℃ in a roller hearth heating furnace or soaking furnace to suppress element segregation.

Multi-pass controlled rolling on a 4100-4200mm plate mill, with finish rolling temperature precisely controlled near the phase transformation point.

Immediate water cooling or laminar cooling after rolling to refine austenite grains.

Heat Treatment:

Quenching: Heated to 900-950℃, followed by high-pressure water jet quenching after heat preservation (cooling rate >30℃/s) to obtain martensitic structure.

Tempering: Tempered in the range of 600-650℃ to eliminate quenching stress and balance strength and toughness (tempered sorbite structure).

Inspection:

100% ultrasonic testing (first pass/second pass/third pass classification) to detect internal defects.

Sampling for mechanical property testing (yield ≥960MPa, impact energy at -20℃ ≥30J) and Z-direction resistance to lamellar tearing .

Construction Machinery:

Excavator booms, crane booms, drills, electric shovels, electric dump truck bodies, mining dump truck bodies, etc., reducing weight by more than 30%, improving operational efficiency and reducing energy consumption.

Wear-resistant and impact-resistant components such as hydraulic supports, bulldozer blades, and drill supports, reducing maintenance costs.

Energy Equipment:

Wind turbine towers, offshore drilling platform structures, with corrosion resistance + wave impact resistance, extending service life.

Polar equipment (e.g., S960QL variant) adapting to -40℃ extremely cold environments.

Architecture and Bridges:

Core support columns of super high-rise buildings, large-span steel beams, reducing building materials usage and optimizing structural design.

High-stress components of suspension bridges and cable-stayed bridges (e.g., cable anchorage devices) with excellent fatigue resistance.

Ships and Ocean Engineering:

Ship pressure bulkheads, offshore platform structures, meeting the corrosion and wave impact requirements of marine environments.

Other Fields:

Key structural parts requiring high strength and toughness in petrochemical, heavy machinery, and other industries.