API 2H Offshore and Marine Structural Steel Plate
API 2H steel plates are high-strength carbon steel materials designed for offshore and marine structures. We supply certified industrial-grade plates for demanding environments.
- High Strength and Corrosion Resistance
- Strict Compliance with API 2H Standards
- Optimized for Heavy-Duty Applications
API 2H Offshore and marine structural steel description
API 2H is a high-strength carbon-manganese steel plate designed for offshore and marine applications, including platforms, ships, and coastal infrastructure. As a leading China-based manufacturer and bulk exporter, we supply API 2H Grade 50 plates with superior toughness, corrosion resistance, and weldability.
Our plates comply with API (American Petroleum Institute) standards and are available in thicknesses from 6mm to 40mm, ideal for EPC contractors, shipbuilders, and offshore fabricators. Suitable for harsh environments, they ensure durability in load-bearing structures.
API 2H Offshore and marine structural steel Data Sheet
| API 2H Chemical Composition (%) | ||
| Element | Grade 42 | Grade 50 |
| Carbon (C) | ≤ 0.18 | ≤ 0.20 |
| Manganese (Mn) | ≤ 1.60 | ≤ 1.70 |
| Phosphorus (P) | ≤ 0.035 | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 | ≤ 0.035 |
| Silicon (Si) | ≤ 0.55 | ≤ 0.55 |
| Niobium (Nb) | – | ≤ 0.05 |
| Vanadium (V) | – | ≤ 0.10 |
| Titanium (Ti) | – | ≤ 0.03 |
| API 2H Mechanical Properties | ||
| Property | Grade 42 | Grade 50 |
| Yield Strength (MPa) | ≥ 290 | ≥ 345 |
| Tensile Strength (MPa) | 415-565 | 450-600 |
| Elongation (%) | ≥ 20 | ≥ 20 |
| Charpy Impact (J) | ≥ 27 (at -20°C) | ≥ 27 (at -20°C) |
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API 2H Offshore and marine structural steel Application
API 2H steel plates are specifically designed for offshore and marine applications, offering high strength, toughness, and corrosion resistance in harsh environments. In offshore oil & gas platforms, they are widely used for fabricating jackets, decks, and subsea structures due to their excellent load-bearing capacity and fatigue resistance. For shipbuilding, API 2H Grade 50 and Grade 60 are ideal for hulls, bulkheads, and other critical components that require durability in seawater exposure.
The energy sector relies on these plates for wind turbine foundations and floating LNG terminals, where structural integrity under dynamic loads is essential. Additionally, API 2H is trusted in bridge construction, port infrastructure, and heavy-duty marine equipment due to its superior weldability and impact performance at low temperatures. Its reliability in extreme conditions makes it a preferred choice for EPC contractors and marine engineers worldwide.
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