Applications of EN 10025-3 S420N Steel
Construction Engineering
High-Rise Buildings: Used in load-bearing columns and beams, reducing weight by 15%–20% compared to S355 steel and lowering transportation costs by 12%.
Large-Span Structures: Enables lightweight design for stadium roofs and similar applications, leveraging its high strength and toughness.
Bridge Engineering
Main Girders and Pylons: In the Danish Great Belt Bridge, 60 mm thick S420N plates achieved weld impact energy ≥50 J at -30°C via twin-wire submerged arc welding, with a design life of 120 years and compliance with EN 1090-2 EXC4 seismic standards.
Heavy Machinery Manufacturing
Crane Booms: The Liebherr LR 13000 lattice boom crane employs S420N welded structures, controlling yield strength fluctuations within ±15 MPa and increasing maximum lifting capacity to 3,600 tons.
Mining Equipment: Used in excavator dipper arms, electric wheel dump trucks, and other components subjected to high impact loads and harsh operating conditions.
Energy Sector
Wind Power Equipment: Applied in tower structures and foundations to support stable wind turbine operation under extreme climatic conditions.
Pressure Vessels and Piping: Manufactures medium- to high-pressure boilers and high-pressure vessels, meeting industrial demands for strength and corrosion resistance.
Transportation
Railway Vehicles: Used in car body components, maintaining stable performance at -50°C (S420NL grade), suitable for extremely cold regions.
Shipbuilding: Utilized in hull structures to resist seawater corrosion and wave impact.
