S275JR Structural Steel (EN 10025): European Standard
EN 10025-2:2019
S275JR is a European hot-rolled structural steel specified under EN 10025-2:2019. With 275 MPa minimum yield strength—approximately 10% higher than S235 and ASTM A36—it enables lighter structural designs while maintaining excellent weldability. The 'JR' designation guarantees 27 Joules impact energy at +20°C, sufficient for indoor and temperate-climate structures. Widely used across EU construction, bridge building, and general engineering where Eurocode design standards apply.
Quick Facts
| Category | Carbon Steel |
| Standard | EN 10025-2:2019 |
| Density | 7.85 g/cm³ |
| Yield Strength | 275 MPa (40 ksi) |
| Tensile Strength | 410-560 MPa (59-81 ksi) |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| ASTM A36 | |
| Q235 | |
| SS400 | |
| St44-2 | |
| E250 |
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Frequently Asked Questions
What is the difference between S275JR and S355J2?
S355J2 offers significantly higher yield strength (355 MPa vs 275 MPa) and guaranteed impact toughness at -20°C (27 Joules minimum). S275JR is suitable for general construction; S355J2 is preferred for dynamically loaded structures and cold-climate applications. S355 adds approximately 30% more load-bearing capacity for the same section size.