S355N
1.0545Normalized fine-grain structural steel. Same yield as S355JR/J2 but with guaranteed fine-grain structure from normalizing. Better weldability and impact toughness than standard S355. Used for bridges, cranes, heavy structural steelwork, and pressure vessels where normalized delivery is specified.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | S355N | 1.0545 | 100% |
Sources: EN 10025-3:2019
Chemical composition comparison (wt%)
Side-by-side: S355N (EN) (EN 10025-3:2019) vs S355N (EN) (EN 10025-3:2019)
| Element | S355N (EN) | S355N (EN) | Overlap |
|---|---|---|---|
| C | 0–0.2% | 0–0.2% | OK |
| Si | 0–0.5% | 0–0.5% | OK |
| Mn | 0–1.65% | 0–1.65% | OK |
| P | 0–0.03% | 0–0.03% | OK |
| S | 0–0.025% | 0–0.025% | OK |
| V | 0–0.12% | 0–0.12% | OK |
| Al | ≥ 0.02% | ≥ 0.02% | OK |
| Ti | 0–0.05% | 0–0.05% | OK |
| Nb | 0–0.05% | 0–0.05% | OK |
Mechanical properties
Normalized
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 470–630 | MPa |
| Yield Strength | ≥ 355 | MPa |
| Elongation | ≥ 22 | % |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
Related materials
S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
S690QL
1.8928High-strength quenched and tempered fine-grain structural steel with minimum yield strength of 690 MPa. Used for heavily loaded structures like mobile cranes, mining equipment, bridges, and pressure vessels.
S275JR
1.0044Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).
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