Steel grades

Structural steel with 275 MPa yield and guaranteed -20°C impact toughness. Mid-range in the EN 10025-2 structural series. Used for general welded structures, cranes, conveyor frames, and building steelwork in moderate cold-climate environments.

Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).

Normalized fine-grain structural steel with 275 MPa yield. The lowest strength grade in the EN 10025-3 normalized series. Better weldability and guaranteed fine-grain structure compared to standard S275JR. Used for welded structures, bridges, and general steelwork where normalized delivery is specified.

Normalized fine-grain structural steel with guaranteed -50°C impact toughness. Lower strength than S355NL but better weldability and ductility. Used for cryogenic-adjacent structures, LNG infrastructure, cold-climate bridges, and storage tanks where low-temperature toughness is critical.

Entry-level HSLA hot-rolled steel for cold forming. The lowest strength grade in the EN 10149-2 TMCP series. Good formability with guaranteed 315 MPa yield. Used for lighter-duty truck components, agricultural equipment, structural profiles, and cold-formed sections where S235/S275 is insufficient.

Non-alloy structural steel with 355 MPa min yield and 27J impact at 0°C. The "J0" variant between JR (+20°C) and J2 (-20°C). Former designation St52-3U (DIN 17100). Good weldability (CEV ≤0.47). Used for bridges, cranes, buildings, wind turbines, heavy machinery frames, and general structural applications requiring moderate low-temperature toughness.

High-strength structural steel with impact testing at -20°C (J2). Higher toughness than S355JR (tested at +20°C). Used for bridges, crane structures, offshore platforms, and cold-weather applications where impact toughness at sub-zero temperatures is required.

High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).

Structural steel with guaranteed Charpy impact at -20°C (KV ≥40J). Same strength as S355J2 (ReH ≥355 MPa) but higher toughness: K2 = 40J at -20°C vs J2 = 27J at -20°C. Used for bridges, crane structures, offshore platforms, and welded structures in cold climates where fracture toughness at low temperature is critical.

HSLA hot-rolled steel for cold forming. Thermomechanically rolled for fine grain and good formability. The most commonly specified TMCP grade. Used for truck frames, agricultural equipment, crane booms, and structural cold-formed components.

Thermomechanically rolled fine-grain structural steel — ReH >=355 MPa with Charpy at -50°C (KV >=27J). THE workhorse for large welded steel structures in cold environments. TM rolling = low CEV = excellent weldability even in thick plate. Used for offshore platforms, wind turbine towers, bridges, crane structures, and pressure vessels. Most common TM grade by tonnage.

Normalized fine-grain structural steel. Same yield as S355JR/J2 but with guaranteed fine-grain structure from normalizing. Better weldability and impact toughness than standard S355. Used for bridges, cranes, heavy structural steelwork, and pressure vessels where normalized delivery is specified.

Normalized fine-grain structural steel with 355 MPa yield and -50°C impact toughness. The most widely used fine-grain grade in EN 10025-3. Workhorse for offshore, bridges, cranes, and wind turbine towers in cold climates. Better low-temp toughness than S355J2.

HSLA hot-rolled steel for cold forming. Between S355MC and S500MC in the EN 10149-2 strength ladder. Thermomechanically rolled for fine grain + good formability. Used for truck chassis components, crane booms, agricultural equipment, and structural cold-formed parts.

Thermomechanically rolled fine-grain structural steel — ReH >=420 MPa with Charpy at -50°C (KV >=27J). Between S355ML and S460ML in the TM strength range. Lower CEV than S420N = better weldability. Used for crane booms, offshore structures, bridge girders, and pressure vessels requiring high strength with excellent low-temperature toughness and weldability.

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.

High-strength normalized fine-grain structural steel. 420 MPa yield with -50°C impact toughness. Between S355NL and S460NL in the strength ladder. Used for bridges, crane structures, pressure vessels, and structural components in cold environments.

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.

HSLA hot-rolled steel for cold forming. Between S420MC and S500MC in the EN 10149-2 strength ladder. Thermomechanically rolled for fine grain + good formability at 460 MPa yield. Used for crane booms, truck chassis, heavy agricultural equipment, and load-bearing cold-formed structures.

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.

Highest-strength normalized fine-grain structural steel in EN 10025-3. YS 460 MPa with guaranteed weldability and impact toughness. Used for heavy crane structures, offshore platforms, bridges, and any high-load structure where normalized delivery is required.

High-strength normalized fine-grain structural steel with 460 MPa yield and impact testing at -50°C. The highest-strength grade in the EN 10025-3 normalized series. Used for offshore platforms, wind turbine towers, arctic bridges, cranes, and heavy steel structures in cold climates.

High-strength low-alloy (HSLA) hot-rolled steel for cold forming. Thermomechanically rolled for fine grain structure. 500 MPa yield strength with excellent cold formability. Used for automotive chassis, truck frames, crane booms, and agricultural equipment.

High-strength quenched and tempered structural steel — YS 690 MPa min. Part of EN 10025-6 series (S500Q to S960Q). Good weldability despite high strength (CEV controlled). Used for mobile cranes, mining equipment, truck chassis, bridge components, and any structure where weight reduction through higher strength is critical. "Q" = quenched, "L" variants add low-temp impact.