S355JR+N is a low-alloy high-strength steel plate. It is a European standard steel plate: it implements EN10025-2:2004 standard: S355JR+N corresponds to the domestic material Q345D. The cross-fire state: hot rolling, controlled rolling, normalizing. It is often used for cutting large parts. Components, mining and metallurgical machinery and equipment, engineering machinery, hydraulic machinery, bridge construction, high-rise buildings, etc.
S355JR+N low alloy steel plate chemical composition:
| Grade | C | Mn | Si | P | S | N | Cu | CEV |
| S355JR+N | 0.24 max. | 1.6 max. | 0.55 max. | 0.04 max. | 0.04 max. | 0.012 max. | 0.55 max. | 0.47 max. |
S355JR+N HSLA steel plate mechanical property
| Grade | Thickness (mm) | Min Yield (Mpa) | Tensile (Mpa) | Elongation (%) | Min Impact Energy | |
| S355JR+N | 8mm-100mm | 315-355 Mpa | 450-630 Mpa | 18-20% | 20 | 27J |
| 101mm-200mm | 285-295 Mpa | 450-600 Mpa | 18% | 20 | 27J | |
| 201mm-400mm | 275 Mpa | - | 17% | 20 | 27J | |
