S355J2 Structural Steel (EN 10025-2) — High-Strength Cold-Climate European Grade
EN 10025-2 · Published: 2026-06-11 · Updated: 2026-06-12
S355J2 is the higher-strength structural steel in EN 10025-2, providing 29% higher yield strength than S275JR. The J2 designation guarantees 27J minimum Charpy impact energy at -20°C — essential for dynamically loaded structures and cold-climate...
S355J2 is the higher-strength structural steel in EN 10025-2, providing 29% higher yield strength than S275JR. The J2 designation guarantees 27J minimum Charpy impact energy at -20°C — essential for dynamically loaded structures and cold-climate construction across Northern Europe. This is the standard grade for bridge construction, offshore platforms, and wind turbine towers in European practice.
Quick Facts
| Category | |
| Standard | EN 10025-2 |
| Density | 7.85 g/cm³ |
| Yield Strength | 355 MPa |
| Tensile Strength | 470-630 MPa |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| ASTM A572 Gr50 | Compare |
| JIS SM490A | Compare |
| GB Q345D | Compare |
| DIN St52-3 | Compare |
Related Materials
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Frequently Asked Questions
S355J2 vs S355JR — when should I upgrade to J2?
Specify J2 when the structure will be exposed to temperatures below 0°C during its service life. JR (20°C impact) is acceptable for indoor or temperate-climate structures. J2 (-20°C) is required for outdoor structures in Northern/Central Europe, bridges, and any structure subject to dynamic loading where brittle fracture at low temperature is a design concern.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu