DNV Grade EH32 Shipbuilding Steel Plate - NV E32 High-Strength Marine Structural Steel

1. What is DNV Grade EH32 shipbuilding steel plate?

DNV Grade EH32 shipbuilding steel plate is a high-quality, cryogenic, high-strength structural steel for marine applications. This material offers excellent low-temperature toughness, strength, weldability, and corrosion resistance. It is capable of withstanding extreme cold marine environments and effectively resisting brittle fracture, saltwater corrosion, and long-term alternating marine loads, thereby ensuring the structural safety and long-term service life of polar vessels and offshore facilities. It is widely used in high-end shipbuilding and the fabrication of structures for polar and cold-region marine engineering projects worldwide.

The DNV Grade EH32 shipbuilding steel plates we supply are produced using advanced TMCP (Thermomechanically Controlled Rolling) technology and standardized heat treatment, offering excellent processing efficiency and construction stability. All products undergo rigorous factory inspections and are DNV-certified, fully complying with international marine engineering construction and bidding standards. They are the preferred high-performance structural steel for cold-region ocean-going vessels, polar engineering equipment, and critical offshore structures.

2. Meaning of the Designation

DNV: Certified by Det Norske Veritas (DNV)

E: Stands for “Quality Grade,”  indicating that the steel has passed an impact test at -40°C

H: Stands for “High Strength”

32: Stands for “Strength Grade,” indicating that the minimum yield strength of the steel is 315 MPa (≈ 32 kgf/mm²)

Chemical Composition (Heat Analysis, wt %)

Carbon Equivalent (wt %)

Calculation formula (IIW): CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15

Tensile Test

Charpy (V-notch) Impact Test

DNV Grade EH32 is a 315 MPa-grade high-strength structural steel plate for shipbuilding. Its key advantage is its low-temperature impact toughness at -40°C, making it suitable for use in extremely cold waters, high-stress ship hulls, and load-bearing structures in offshore engineering.

I. Civil Ocean-Going Commercial Vessels

1. Large bulk carriers, container ships, crude oil tankers, and chemical tankers

Application areas: High-strength deck stringers, top-tier side plates, keel, main frames, high-strength crossbeams, longitudinal bulkheads, outer side plates, and high-stress areas at the bow and stern.

2. LNG/LPG Liquefied Gas Carriers

Application Areas: Peripheral support structures of liquid cargo tanks, enclosure structures in cryogenic zones, and tank stiffeners.

II. Special-Purpose Vessels for Polar/Extremely Cold Waters

1. Icebreakers, Polar Research Vessels, and Arctic Route Transport Vessels

Application Areas: Bow ice-strike zone, ice-breaking reinforced hull plates, thickened bow stem structure, and ice-zone side protection plates (meeting PC5–PC7 ice class requirements).

2. Cold-water Tugs, Offshore Rescue Vessels, and Arctic Fishing Vessels

Application Areas: Hull outer shell, collision protection structures, and load-bearing deck platforms.

III. Offshore Oil and Gas Engineering Platforms

1. Fixed Offshore Drilling and Production Platforms

Application Areas: Jack-up jacket node reinforcement plates, column reinforcement rings, deck main girders, pile leg connection structures, and load-bearing bases for upper modules.

2. Self-elevating/Semi-submersible Drilling Rigs

Application Areas: Float hulls, lifting mechanism support structures, and cantilever beam bases.

3. Offshore Wind Power Foundations

Application Areas: Jack-up foundation flanges, tower base reinforcement plates, main load-bearing structures of offshore substations.

IV. Military and Special-Purpose Vessels

1. Military Transport Ships and Landing Ships

Application Areas: Auxiliary hull reinforcement structures, deck armor backing plates, hull compartment reinforcement plates.

2. Submarines

Application Areas: Auxiliary support structures for non-pressure hulls.

3. Coastal Patrol Vessels

Application Areas: High-stress hull side structures.

V. Port and Coastal Engineering Infrastructure

Application Areas: Large-scale wharf mooring piers, steel structures for breakwaters, bases for port crane vessels, main structures of barge vessels, steel box girders for the offshore sections of cross-sea bridges, and load-bearing steel girders for offshore jetties.

VI. Ship Repair and Refitting

1. Upgrading and weight-reduction retrofits for aging vessels;

2. Installation of ice-breaking and reinforcement structures on ice-class vessels;

3. Replacement parts for damaged decks and hull sides of large vessels;

4. Reinforcement and replacement of high-stress structures.

Key Advantages of DNV Grade EH32 Shipbuilding Steel Plates

1. Excellent Cryogenic Toughness

Maintains stable impact toughness and structural integrity at extreme low temperatures of -40°C, effectively preventing brittle fracture and ensuring long-term operational safety.

2. Excellent Weldability and Machinability

With a low carbon equivalent, there is no risk of weld cracking defects. It offers good machinability for cutting, bending, drilling, and other operations.

3. Superior Adaptability to Marine Environments

It exhibits good resistance to salt spray corrosion and atmospheric corrosion, effectively extending the service life of marine structures and equipment.

4. High Structural Safety and Stability

It features a uniform internal structure, strong load-bearing capacity, and high impact resistance.

Our Service Advantages

1. Authoritative Official DNV Certification

All products have passed rigorous DNV certification and come with factory test reports.

2. Full-Range Customization Services

We support customization across all specifications and dimensions, as well as value-added processing services.

3. Stable Supply Capacity

With ample stock on hand, we support both custom production and bulk export orders.

4. Professional Global Export Services

We are well-versed in international maritime steel trade regulations and provide global logistics and professional after-sales technical support.

• Differences Between DNV Grade AH32 and DH32 and EH32