Key Equivalent ASTM Grades
| Property | EN 10025-2 S355J2 | ASTM A572 Grade 50 | ASTM A992 (Alternative) |
|---|---|---|---|
| Yield Strength (min) | 355 MPa (~51 ksi) | 345 MPa (~50 ksi) | 345-450 MPa (~50-65 ksi) |
| Tensile Strength | 470-630 MPa | 450 MPa (min) | 450 MPa (min) |
| Elongation (min) | 22% (thickness-dependent) | 18-21% (varies) | 18-21% (similar) |
| Impact Test | Charpy V-notch @ -20°C (J2 suffix) | Typically not required (unless specified) | Often specified for seismic zones |
| Common Applications | Bridges, buildings, general structures | Structural frameworks, heavy construction | High-rise buildings, seismic-resistant structures |
Additional Notes
Impact Toughness – S355J2 requires Charpy impact testing at -20°C, while ASTM A572 Gr. 50 typically does not (unless supplementary requirements apply).
Chemical Composition – A572 Gr. 50 has tighter phosphorus (P) & sulfur (S) limits compared to S355J2.
Alternative ASTM Grades – If low-temperature toughness is critical, ASTM A709 Grade 50 (bridge steel) or ASTM A588 (weathering steel) may be considered.
Conclusion
For general structural applications, ASTM A572 Grade 50 is the closest match. If impact testing at -20°C is mandatory, ASTM A709 Grade 50 or custom-specified A572 with supplementary requirements (SRT) may be needed.
