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S355G2+N steel plate belongs to European standard low-alloy high-strength steel, which is welded structural steel for fixed offshore structures, and belongs to welded structural steel for fixed offshore structures. "S" means structural steel, "355" means the minimum yield strength of steel plates, and G2 is relevant number of steel grade characteristics, N is normalized or normalized rolled delivery condition.
S355G2+N steel plate executive standard: EN 10225-2009.
S355G2+N steel plate heat treatment delivery status: normalized rolling, normalized.
Smelting analysis of chemical composition of S355G2+N steel plate:
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Nb | V | Ti | Alt | N | CeqMax |
| ≤0.2 | ≤0.5 | 0.9-1.65 | ≤0.035 | ≤0.03 | ≤0.5 | ≤0.3 | ≤0.1 | ≤0.35 | ≤0.06 | ≤0.12 | ≤0.03 | ≥0.02 | ≤0.015 | ≤0.43 |
Ingredient Notes: Alt/N≥2. Ceq = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
Mechanical properties of S355G2+N steel plate:
| Grade | Mechanical properties | |
| S355G2+N plate (≤16mm) | ReH(MPa) | ≥355 |
| Rm(MPa) | 470-630 | |
| A(%) | ≥22 | |
| Impact temperature | -20 | |
| Akv(J) | ≥50 | |
| S355G2+N plate (>16-25mm) | ReH(MPa) | ≥345 |
| Rm(MPa) | 470-630 | |
| A(%) | ≥22 | |
| Impact temperature | -20 | |
| Akv(J) | ≥50 | |
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