Characteristics of EN10120 P245NB Steel
Chemical Composition Characteristics
The chemical composition design of P245NB steel centers on low carbon content, with carbon strictly controlled at ≤0.16%. Simultaneously, the contents of silicon (≤0.25%), manganese (≤0.30%), phosphorus (≤0.025%), and sulfur (≤0.015%) are limited. This composition ensures that the steel maintains sufficient strength while exhibiting excellent weldability and formability. Additionally, the addition of aluminum (≥0.020%) further refines the grain structure, enhancing the material's toughness, while stringent control of nitrogen (≤0.009%) prevents defects such as porosity during welding.
Mechanical Property Characteristics
P245NB steel demonstrates a yield strength (ReL) of not less than 245 MPa, with a tensile strength (Rm) ranging between 410 and 500 MPa. The elongation after fracture (A) is ≥25% for thicknesses ≤3 mm and ≥34% for thicknesses between 3 mm and 5 mm. This balance of strength and plasticity enables the steel to withstand certain loads without permanent deformation while maintaining good ductility for easy processing and forming. The heat treatment process in the normalized or normalized-rolled condition further optimizes the material's comprehensive properties, allowing it to meet various engineering requirements at room temperature.
Process Performance Characteristics
P245NB steel exhibits excellent cold rolling, hot rolling, and annealing processability, adapting well to various forming techniques. Its surface can be finished in multiple states, including matte, bright, brushed, or 8K mirror, meeting the aesthetic and functional demands of different applications. Furthermore, the steel demonstrates outstanding weldability, allowing for connection through various welding methods. The welded joints exhibit high strength and good toughness, making the steel suitable for manufacturing complex structural components.
