S460N

S460N is a structural steel grade defined in the European standard EN 10025-3 for hot-rolled products intended for welded structures. The designation N indicates that the steel is delivered in a normalized or normalized rolled condition, which enhances toughness and notch toughness, particularly at lower temperatures, compared with non-normalized grades.

Chemical composition for S460N is controlled to EN limits and typically features a low carbon content with manganese and silicon to support strength and deoxidation, while microalloying elements such as niobium, vanadium or titanium may be present in small amounts to refine grain structure and improve weldability. Exact limits can vary by producer and product form, so specifications should be confirmed on the delivery document.

Mechanical properties are specified with a nominal yield strength around 460 MPa. Tensile strength is usually in the approximate range of 540 to 700 MPa, with ductility and toughness suitable for structural welded applications. The normalization process contributes to good impact toughness, including at low temperatures, making S460N well suited for components exposed to demanding service conditions.

Applications of S460N include structural steelwork where higher strength and reliable weldability are required, such as bridges, large framework structures, crane girders, heavy equipment frames, and certain offshore or wind energy components, depending on project requirements and local codes.

Manufacture and processing involve hot rolling followed by normalization or normalized rolling. It is typically supplied as hot-rolled coil or sections and is intended for welding; fabricators should follow appropriate welding guidelines and consider preheating or post-weld heat treatment according to thickness and joint design.