EN10225-1 S355G7+M Offshore and marine structural steel plate
EN10225-1 S355G7+M is an offshore and marine structural steel plate designed for demanding environments. We provide certified industrial supply for reliable performance.
1. Superior Weldability and Impact Toughness
2. Multiple Grades and Thickness Options
3. Certified to International Standards
EN10225-1 S355G7+M Offshore and marine structural steel description
We are a leading China-based manufacturer and bulk exporter of EN10225-1 S355G7+M steel plates, designed for demanding offshore and marine applications. Our high-strength, low-alloy structural plates offer superior corrosion resistance, excellent weldability, and enhanced toughness for harsh environments.
EN 10225-1 S355G7-Chemical Composition/Tensile Requirements
| EN 10225-1 S355G7-Chemical Composition | |||
| Element (%) | S355G7+N | S355G7+M | S355G7+QT |
| C (max) | 0.16 | 0.16 | 0.16 |
| Si (max) | 0.5 | 0.5 | 0.5 |
| Mn (max) | 1.6 | 1.6 | 1.6 |
| P (max) | 0.025 | 0.025 | 0.025 |
| S (max) | 0.015 | 0.015 | 0.015 |
| Cu (max) | 0.3 | 0.3 | 0.3 |
| Ni (max) | 0.5 | 0.5 | 0.5 |
| Cr (max) | 0.3 | 0.3 | 0.3 |
| Mo (max) | 0.1 | 0.1 | 0.1 |
| Nb (max) | 0.05 | 0.05 | 0.05 |
| V (max) | 0.1 | 0.1 | 0.1 |
| Ti (max) | 0.03 | 0.03 | 0.03 |
| Al (min) | 0.015 | 0.015 | 0.015 |
| CEV (max) | 0.43 | 0.43 | 0.43 |
| EN 10225-1 S355G7– Tensile Requirements | |||
| Property | S355G7+N | S355G7+M | S355G7+QT |
| Yield Strength (MPa) | ≥ 355 | ≥ 355 | ≥ 355 |
| Tensile Strength (MPa) | 470 – 630 | 470 – 630 | 470 – 630 |
| Elongation A₅ (%) | ≥ 22 | ≥ 22 | ≥ 22 |
| Impact Energy (J) | ≥ 40 (-20°C) | ≥ 40 (-20°C) | ≥ 40 (-20°C) |
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EN10225-1 S355G7+M Offshore and marine structural steel Application
widely used in demanding offshore and marine environments due to their high strength, toughness, and corrosion resistance. In offshore oil & gas platforms, they are ideal for fabricating jacket legs, topside modules, and subsea structures, ensuring reliability in harsh seawater conditions. The shipbuilding industry relies on S355G7+M for hulls, decks, and bulkheads, where its excellent weldability and impact resistance at low temperatures enhance structural integrity.
Renewable energy projects, such as wind turbine foundations and transition pieces, benefit from this steel’s fatigue resistance and durability in corrosive marine atmospheres. The material is also trusted in port infrastructure, including heavy-load quay walls and crane runways, due to its high load-bearing capacity.
With stringent compliance to EN10225-1 standards, S355G7+M is a preferred choice for EPC contractors and marine engineers worldwide, offering long-term performance in extreme offshore and marine applications.
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