Materials database

Normalized fine-grain structural steel — ReH >=420 MPa with Charpy at -20°C (KV >=27J). Between S355N and S460N. Fine grain from Al/Nb/V micro-alloying + normalizing. Used for bridges, crane structures, pressure vessels, and heavy structural applications where TM-rolling (ML grades) is not available or where normalizing is required by code.

Higher-strength structural steel with 450 MPa yield, 0°C impact. Bridges the gap between S355 and S460 in the EN 10025-2 series. Used for heavily loaded structures, crane components, and building steelwork where S355 is insufficient but normalized fine-grain (EN 10025-3) is not required.

Thermomechanically rolled weldable fine-grained structural steel with minimum yield strength 460 MPa. The highest standard strength level in EN 10025-4. M designation indicates TMCP delivery condition. Excellent weldability with low carbon equivalent despite high strength. Used for offshore wind turbine foundations, heavy crane booms, bridge girders, and weight-optimized structural applications. Equivalent to DIN StE460TM.

Thermomechanically rolled fine-grain structural steel — ReH >=460 MPa with Charpy at -50°C (KV >=27J). TM rolling = fine grain without normalizing = higher strength at lower CEV = better weldability than S460N. Used for offshore jackets, heavy crane booms, bridges in cold climates, and large welded structures needing high strength + low-temp toughness.

Quenched and tempered fine-grained structural steel with minimum yield strength 460 MPa. Q designation indicates impact testing at room temperature. Entry-level grade of the EN 10025-6 QT steels. Used for bridges, cranes, structural hollow sections, and general heavy construction where higher strength than S355 is needed with good weldability.

Quenched and tempered fine-grained structural steel with minimum yield strength 460 MPa and guaranteed impact toughness at -40°C (QL designation). Same strength as S460Q but with improved low-temperature properties through tighter P and S control. Used for bridges, offshore structures, and crane booms operating in cold climates.

Quenched and tempered fine-grained structural steel with minimum yield strength 460 MPa and guaranteed impact toughness at -60°C (QL1 designation). The most demanding low-temperature variant of the S460 series, with the strictest P and S limits for maximum toughness. Used for arctic offshore structures, cryogenic applications, safety-critical structural components in extreme cold environments, and bridge construction in polar regions.

Quenched and tempered fine-grained structural steel with minimum yield strength 500 MPa. Q designation indicates impact testing at room temperature. Combines good weldability with significantly higher strength than conventional S355 grades. Used for hydraulic supports, construction machinery, crane components, heavy vehicles, and mining equipment where weight reduction is beneficial.

Quenched and tempered fine-grained structural steel with minimum yield strength 500 MPa and guaranteed impact toughness at -40°C (QL designation). Tighter P and S control than S500Q for improved low-temperature performance. Used for construction and mining machinery, crane booms, heavy vehicle chassis, and structural components in cold climate applications.

Quenched and tempered fine-grained structural steel with minimum yield strength 550 MPa. Q designation indicates impact testing at room temperature. Intermediate strength grade between S500 and S620 in the EN 10025-6 series. Used for hydraulic supports, construction machinery, crane components, and heavy vehicle chassis where higher strength than S500 is needed.

Quenched and tempered fine-grained structural steel with minimum yield strength 550 MPa and guaranteed impact toughness at -40°C (QL designation). Tighter P and S limits than S550Q for improved low-temperature performance. Used for construction and mining machinery, crane booms, and heavy structural components in cold climate applications.

Quenched and tempered fine-grained structural steel with minimum yield strength 620 MPa. Q designation indicates impact testing at room temperature. High-performance grade bridging the gap between S550 and S690. Used for heavy-duty crane booms, mining equipment, structural components requiring weight optimization, and safety-critical applications.

Quenched and tempered fine-grained structural steel with minimum yield strength 620 MPa and guaranteed impact toughness at -40°C (QL designation). Tighter impurity control for low-temperature service. Used for crane booms in cold climates, offshore lifting equipment, and structural applications requiring both high strength and sub-zero toughness.

High-strength quenched and tempered fine-grained structural steel with minimum yield strength 690 MPa and guaranteed impact toughness at -60°C (QL1 designation). The most demanding low-temperature variant of the S690 series. Used for arctic offshore structures, mobile cranes operating in extreme cold, heavy lifting equipment, and safety-critical structural applications requiring both high strength and exceptional low-temperature toughness.

Ultra-high-strength quenched and tempered fine-grained structural steel with minimum yield strength 890 MPa. Q designation indicates impact testing at room temperature. Just below S960 in the EN 10025-6 hierarchy. Used for mobile cranes, aerial work platforms, mining equipment, and heavy transport vehicles where maximum weight reduction is desired without the extreme welding precautions of S960.

Ultra-high-strength quenched and tempered fine-grained structural steel with minimum yield strength 890 MPa and guaranteed impact toughness at -40°C. One of the highest strength grades in EN 10025-6, just below S960. Used for mobile cranes, aerial work platforms, heavy transport vehicles, mining machinery, and offshore lifting equipment where maximum weight reduction is critical. Weldable with careful parameter control.

Ultra-high-strength quenched and tempered fine-grained structural steel with minimum yield strength 960 MPa. QL designation indicates impact testing at -40°C. Used for mobile cranes, heavy lift equipment, offshore wind turbine towers, mining machinery, and weight-critical structural applications. Weldable with appropriate precautions (preheating, low hydrogen). Dramatically reduces component weight compared to conventional structural steels.