What European I-beam grade directly replaces China’s Q355B?

The direct European replacement for GB Q355B I-beams is S355JR (per EN 10025-2:2004), used for European IPE (parallel-flange I-beams) and IPN (tapered-flange I-beams). This equivalence stems from aligned mechanical properties and chemistry: both have a minimum yield strength of 355 MPa (≤16 mm thickness) and tensile strength of 470–630 MPa, ensuring identical load-bearing capacity for structural uses like building frames or bridge girders. Chemically, S355JR has carbon (max 0.24%), manganese (1.00–1.60%), phosphorus (max 0.035%), and sulfur (max 0.035%)-nearly identical to Q355B. For cold climates, S355J0 (0°C impact test, 27 J) or S355J2 (-20°C impact test, 27 J) align with Q355B's 0°C/34 J requirement. This makes S355JR/IPE-IPN the most reliable substitute, requiring no major design changes for 90% of Chinese applications.