European S355J2 (EN 10025-2) is the equivalent of GB Q355C channels, matching low-temperature toughness:
Impact Toughness: Q355C requires 34 J at -20°C (GB/T 1591), while S355J2 requires 27 J at -20°C (EN 10025-2). For most applications, this difference is acceptable, as S355J2's 27 J still meets Chinese design codes (GB 50017-2017) for cold regions. For critical projects (e.g., arctic pipelines), specify S355J2 with enhanced impact energy (34 J at -20°C)-a custom option from European mills.
Mechanical Properties: S355J2 (355 MPa yield, 470–630 MPa tensile) matches Q355C, ensuring same load capacity. Elongation (21% min) is identical to Q355C's 22% min, with no fabrication issues.
Chemical Composition: S355J2 has tighter impurity limits (P: max 0.030%, S: max 0.025%) than Q355C (P/S: max 0.035%), reducing cold brittleness risk.
S355J2 is used in European cold-climate projects (e.g., Scandinavian bridges), making it a proven substitute for Q355C in northern China.