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.
Oil and offshore platform S355G2+N,S355G2+N steel plate,S355G2+N steel sheet specification,the steel grade S355G2+N with normalized heat treatment.S355G2+N oil platform steel plate produced to this specification are used for welded construction of offshore structures in selected critical sections that must exhibit good impact properties and resistance to fatigue and through-thickness or lamellar tearing. The primary use of these steels is in tubular joints, stiffened plate construction, and other intersections whereportions of the plates will be subjected to tension in the through-thickness (Z) direction.
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 | |
