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Shipbuilding Steel Plate | AH36 | DH36 | EH36 | FH36 Steel
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Shipbuilding steel plates are specialized high-strength carbon and alloy steels meticulously engineered for ship construction and marine structures. According to ABS, they are classified into grades including A, B, D, E, AH, DH, and EH series.
Common Shipbuilding Steel Plate
AH36, DH36, and EH36 are among the most widely used grades in the shipbuilding industry. Compared to regular carbon steel, AH36, DH36, EH36, and FH36 are stronger and more resistant to rust. In terms of strength, FH36 offers the highest yield strength, followed by EH36, DH36, and then AH36.
- AH36 Applications: Bulk carriers, container ships, tankers, general cargo ships
- DH36 Applications: Oil tankers, offshore supply vessels, docks, offshore platforms
- EH36 Applications: Offshore drilling rigs, offshore platforms, FPSOs, cold-weather vessels
- FH36 Applications: Icebreakers, Arctic-class vessels, oil rigs, platforms, deep-sea exploration vessels
Shipbuilding Steel Plate Dimensions Range and Certifications
SteelPro Group produces a wide range of shipbuilding steel plates, including normal strength (A-E), and high strength (AH32-FH40). We offer these plates in different delivery conditions such as TM, TMCP, N, and NR to meet various shipbuilding needs.
Below are our typical dimension ranges for shipbuilding steel plates:
- Thickness: 6 mm to 150 mm (0.24 in to 5.91 in)
- Width: 1,500 mm to 3,000 mm (59.06 in to 118.11 in)
- Length: 6,000 mm to 12,000 mm (236.22 in to 472.44 in)
We also offer custom dimensions to meet your specific project requirements. If you need shipbuilding steel plates with thicknesses below 6mm, please note that a minimum order quantity (MOQ) will apply.
Our shipbuilding steel plates are manufactured and certified to the highest standards. The following certifications ensure that our products comply with the international standards for shipbuilding and offshore applications.
- American Bureau of Shipping (ABS)
- Lloyd’s Register (LR)
- China Classification Society (CCS)
- Korean Register of Shipping (KR)
Different Grades of Shipbuilding Steel Plate
Shipbuilding steel grades include A, B, D, E, AH32, DH32, EH32, AH36, DH36, EH36, AH40, DH40, and EH40. The classification primarily depends on the steel’s tensile strength and impact resistance at low temperatures.
A, B, D, and E Grades
The grades A, B, D, and E represent the basic grades of steel in shipbuilding, commonly used for constructing hulls and other ship components. As you move from Grade A to Grade E, the steel becomes tougher and more resistant to lower temperatures.
Higher Strength Shipbuilding Steel Grades
The AH32, DH32, EH32, AH36, DH36, EH36, FH36 AH40, DH40, and EH40 grades are designed for vessels and offshore platforms requiring higher resistance to mechanical stress and fatigue. The numbers (32, 36, 40) indicate the minimum yield strength of the steel, expressed in megapascals (MPa).
For more detailed information on shipbuilding steel grades, click here.
Chemical Composition of Shipbuilding Steel Plate
| Element | C | Mn | Al | Si | P | S |
| A | ≤0.21 | ≤1.3 | ≥0.015 | 0.10~0.50 | ≤0.035 | 0.035 |
| B | ≤0.21 | ≤1.3 | ≥0.015 | 0.10~0.50 | ≤0.036 | 0.035 |
| D | ≤0.21 | ≤1.3 | ≥0.015 | 0.10~0.50 | ≤0.037 | 0.035 |
| E | ≤0.21 | ≤1.3 | ≥0.015 | 0.10~0.50 | ≤0.038 | 0.035 |
| AH32 | ≤0.18 | 0.7~1.60 | ≥0.015 | 0.10~0.50 | ≤0.04 | ≤0.04 |
| DH32 | ≤0.18 | 0.90~1.60 | ≥0.015 | 0.10~0.50 | ≤0.04 | ≤0.04 |
| EH32 | ≤0.18 | 0.90~1.60 | ≥0.015 | 0.10~0.50 | ≤0.04 | ≤0.04 |
| AH36 | ≤0.18 | 0.7~1.60 | ≥0.015 | 0.10~0.50 | ≤0.04 | ≤0.04 |
| DH36 | ≤0.18 | 0.90~1.60 | ≥0.015 | 0.10~0.50 | ≤0.04 | ≤0.04 |
| EH36 | ≤0.18 | 0.90~1.60 | ≥0.015 | 0.10~0.50 | ≤0.04 | ≤0.04 |
| FH36 | ≤0.16 | 0.90~1.60 | ≥0.015 | 0.10~0.50 | ≤0.025 | ≤0.025 |
Mechanical Properties of Shipbuilding Steel Plate
| Grade | Tensile Strength | Yield Strength | Charpy V-notch Impact | Test Temperature |
| A | 400–490MPa / 58–71ksi | Min. 240 MPa / 35 ksi | Not specified | 20°C / 4°F |
| B | Min. 240 MPa / 35 ksi | Not specified | 0°C / 32°F | |
| D | Min. 250 MPa / 36 ksi | 27 J / 20 ft-lb | -20°C / -4°F | |
| E | Min. 255 MPa / 37 ksi | 27 J / 20 ft-lb | -40°C / -40°F | |
| AH32 | 440–590 MPa / 64-86 ksi | Min. 315 MPa / 46 ksi | 27 J / 20 ft-lb | 0°C / 32°F |
| DH32 | Min. 355 MPa / 51 ksi | 27 J / 20 ft-lb | 0°C / 32°F | |
| EH32 | Min. 355 MPa / 51 ksi | 27 J / 20 ft-lb | -20°C / -4°F | |
| FH32 | Min. 355 MPa / 51 ksi | 27 J / 20 ft-lb | -40°C / -40°F | |
| AH36 | 490–620 MPa / 71–90 ksi | Min. 355 MPa / 51 ksi | 27 J / 20 ft-lb | 0°C / 32°F |
| DH36 | Min. 355 MPa / 51 ksi | 27 J / 20 ft-lb | -20°C / -4°F | |
| EH36 | 510–690 MPa / 74–100 ksi | Min. 355 MPa / 51 ksi | 27 J / 20 ft-lb | -40°C / -40°F |
| FH36 | Min. 355 MPa / 51 ksi | 27 J / 20 ft-lb | -60°C / -60°F | |
| AH40 | 510 – 660 MPa / 74 – 96 ksi | Min. 390 MPa / 57 ksi | 27 J / 20 ft-lb | -20°C / -4°F |
| DH40 | Min. 390 MPa / 57 ksi | 27 J / 20 ft-lb | -20°C / -4°F | |
| EH40 | Min. 390 MPa / 57 ksi | 27 J / 20 ft-lb | -20°C / -4°F | |
| FH40 | Min. 390 MPa / 57 ksi | 27 J / 20 ft-lb | -40°C / -40°F |
Advanced Process for Shipbuilding Steel Plate Production
At SteelPro Group, we adopt advanced technologies to ensure the production of high-quality shipbuilding steel plates.
Smelting Process
We implement pre-deoxidation methods to minimize aluminum oxidation losses. These methods utilize elements such as silicon and manganese to stabilize the steel’s composition.
Carbon Content Control
We strictly control the endpoint carbon content during the smelting process. This ensures optimal fluidity of the molten steel, which is crucial for enhancing both the casting process and the subsequent processing performance of the steel plates.
Microalloying Technology
To further enhance the material’s properties, we apply microalloying technology. This process maintains a stable aluminum content in the steel while significantly improving its toughness.
Rolling Process
Through Type II Controlled Rolling, we precisely control temperature and deformation to achieve superior mechanical properties, ensuring that the final product meets the rigorous standards of the shipbuilding industry.
Top-Quality Shipbuilding Steel Plates
Need Assistance with Your Shipbuilding Steel Plate Solution? Our shipbuilding plates, such as AH36, DH36, EH36, and FH36, comply with international regulations. Depending on your project’s needs, we offer customization options such as cutting, surface treatment, or specific testing to match your project’s specifications.
