Structural Steel for Shipbuilding and Offshore Engineering
Structural steel for shipbuilding and offshore engineering (referred to as "offshore steel") is a core material supporting the national strategy for maritime development. It is specifically used to construct and manufacture large-scale engineering equipment and vessels designed for long-term service in extreme marine environments. Compared with general low alloy structural steel, offshore steel must withstand the "high salinity, high pressure, high humidity, and low temperature" of the marine environment, which makes its technical barriers and production difficulty exceptionally high.
From ensuring vessel safety to advancing into deep and distant seas, steel for shipbuilding and offshore engineering is evolving toward higher strength, greater toughness, and improved corrosion resistance, providing irreplaceable foundational material support for the exploration and utilization of the blue territory.
Product Advantages
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High Strength and Lightweight Design
High Strength and Lightweight Design: Through microalloying processes, yield strength is enhanced from 355MPa to 690MPa or even higher. Higher strength means less steel is required to support heavier equipment.
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Excellent Low-Temperature Toughness
Excellent Low-Temperature Toughness: Through specialized process control of steel purity and microstructure, high toughness is maintained even at extreme low temperatures of -60°C, preventing brittle fracture.
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Superior Fatigue and Lamellar Tearing Resistance
Superior Fatigue and Lamellar Tearing Resistance: Effectively resists fatigue damage caused by cyclic loads such as wave action, and prevents lamellar tearing during welding.
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Good Weldability
Good Weldability: Through low carbon equivalent design and matched processes, the weld zone performance is essentially consistent with the base metal, ensuring overall structural safety.
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Reliable Corrosion Resistance
Reliable Corrosion Resistance: Through the addition of alloying elements (such as copper, chromium, nickel), a dense and stable protective layer is formed to resist chloride ion attack from the marine environment.
Related Certifications
- Classification Approval
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ABS Certificate -
BV Certificate -
CCS Certificate -
DNV Certificate -
KR Certificate -
LR Certificate -
NK Certificate -
RINA Certificate
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Market Applications
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Shipbuilding
The largest application segment. Hull structures ranging from large container ships and tankers to icebreakers and LNG carriers widely utilize this steel. In 2025, China's shipbuilding plate production reached 16.73 million tons, with future demand expected to exceed 21 million tons.
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Offshore Oil & Gas Development
Applied in leg rack steel and semi-circular plates of self-elevating drilling platforms, which must withstand the weight of equipment weighing hundreds of tons.
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Offshore Wind Power
The fastest-growing segment in recent years. Mainly used in key components such as jackets and tower sections that support wind turbines. In 2025, offshore wind steel demand reached approximately 2.7 million tons, with an annual growth rate of 39%.
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Polar and Deep-Sea Equipment
Used in major projects such as the Deep Sea No.1 platform and the Arctic Yamal project, with strength grades extended to 420–690MPa, and products exported overseas.
Specifications
| Execution Standard | Grade | Guaranteed Properties (mm) | Guaranteed Ultrasonic Testing (mm) | Delivery Condition |
| ABS, BV, CCS, DNV, KR, LR, NK, RINA and GB712 | A, B, D, E AH32/36/40, DH32/36/40, EH32/36/40 (including Z25, Z35) | 6～60 | 6～60 | AR, TM |
We Value Every Customer
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Phone
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Email
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Jinqiao Economic Development Zone, Yi'an District, Tongling City, Anhui Province (within Donglian Town)
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