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Product Description
ASTM A131 specification covers structural steel plates, sections, and steel rods used in shipbuilding.
ASTM A131 marine steel plates can be used to manufacture hull structures for ocean-going, coastal and inland navigation vessels. Steel plates for shipbuilding are required to have certain strength, toughness, low temperature and corrosion resistance as well as good welding performance.
Marine steel plate refers to the hot-rolled steel sheets used to manufacture the hull structure produced in accordance with the requirements of the classification society’s construction rules.
Structural shipbuilding steel plates are divided into strength grades according to their minimum yield points: general strength structural steel plates and high strength structural alloy steel plates. Structural naval steel plates are divided into two types: general strength ship plate and high strength ship plate. General strength steel is divided into four grades of A, B, D and E according to quality; high strength steel is divided into two strength grades and three quality grades; AH32 , DH32, EH32, AH36, DH36, EH36.
The general-strength structural steels in China Classification Society standards are divided into four quality grades: A, B, C, and D (i.e. CCSA, CCSB, CCSC, CCSD); the high-strength structural steels in China Classification Society standards are three Intensity levels, four quality levels.
Classification society rules
CCS (China), ABS (USA), GL (Germany), BV (France), DNV (Norway), KDK (Japan), LR (UK).
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Standards and Classifications
| Standard | Shipbuilding and Offshore Structure Steel Plate Grades | |||
| ASTM A131 | Grade A | Grade B | Grade D | Grade E |
| AH32 | DH32 | EH32 | FH32 | |
| AH36 | DH36 | EH36 | FH36 | |
| AH40 | DH40 | EH40 | FH40 | |
| EN 10225 | S355G2+N | S355G3+N | S355G5+M | S355G6+M |
| S355G7+M | S355G7+N | S355G8+M | S355G8+N | |
| S355G9+N | S355G9+M | S355G10+N | S355G10+M | |
| S420G1+Q | S420G1+M | S420G2+Q | S420G2+M | |
| S460G1+Q | S460G1+M | S460G2+Q | S460G2+M | |
| API SPEC 2H | API 2H-42 | API 2H-50 | ||
Product Display
We have a large stock of steel plates, such as carbon steel plate, alloy steel sheet, hot rolled steel plate, cold rolled steel sheets, etc. Welcome to visit our factory at any time.
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We can supply various types of carbon steel paltes for hull to meet your various needs.
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| ASTM A131 Steel Plate Chemical Composition (max.) | ||||||
| Grade | C | Mn | Si | P | S | Others |
| Grade A | 0.21 | 2.5xC | 0.5 | 0.035 | 0.035 | |
| Grade B | 0.21 | 0.6 | 0.35 | 0.035 | 0.035 | |
| Grade D | 0.21 | 0.6 | 0.01-0.35 | 0.035 | 0.035 | |
| Grade E | 0.18 | 0.7 | 0.01-0.35 | 0.035 | 0.035 | |
| AH32/DH32/EH32 | 0.18 | 0.90-1.60 | 0.10-0.50 | 0.035 | 0.035 | Cb 0.02-0.05, V 0.05-0.10, Ti 0.02, Cu 0.35, Cr 0.20, Ni 0.40, Mo 0.08, Als min. 0.015 |
| AH36/DH36/EH36 | ||||||
| AH40/DH40/EH40 | ||||||
| FH32/FH36/FH40 | 0.16 | 0.90-1.60 | 0.10-0.50 | 0.025 | 0.025 | |
| ASTM A131 Steel Plate Mechanical Properties | ||||
| Grade | Yield Strength | Tensile Strength | Elongation in 8 in. | Elongation in 2 in. |
| min. MPa) | MPa | min. % | min. % | |
| Grade A, B, D, and E | 235 | 400-520 | 21 | 24 |
| AH32 DH32 EH32 FH32 | 315 | 440-590 | 19 | 22 |
| AH36 DH36 EH36 FH36 | 355 | 490-620 | 19 | 22 |
| AH40 DH40 EH40 FH40 | 390 | 510-650 | 19 | 22 |
| ASTM A131 Steel Plate Charpy V-Notch Impact Test Temperature | |
| Grade | Temperature ⁰F [⁰C] |
| Grade A | 68 [20] |
| Grade B AH32 AH36 AH40 | 32 [0] |
| Grade D DH32 DH36 DH40 | -4 [-20] |
| Grade E EH32 EH36 EH40 | -40 [-40] |
| FH32 FH36 FH40 | -76 [-60] |
| Standard | Shipbuilding and Offshore Structure Steel Grades | |||
| ASTM A131 | Grade A | Grade B | Grade D | Grade E |
| AH32 | DH32 | EH32 | FH32 | |
| AH36 | DH36 | EH36 | FH36 | |
| AH40 | DH40 | EH40 | FH40 | |
| EN 10225 | S355G2+N | S355G3+N | S355G5+M | S355G6+M |
| S355G7+M | S355G7+N | S355G8+M | S355G8+N | |
| S355G9+N | S355G9+M | S355G10+N | S355G10+M | |
| S420G1+Q | S420G1+M | S420G2+Q | S420G2+M | |
| S460G1+Q | S460G1+M | S460G2+Q | S460G2+M | |
| API SPEC 2H | API 2H-42 | API 2H-50 | ||
| Steel Grade | C | Si | Mn | P | S | Als |
| A | ≤0.21 | ≤0.50 | ≥2.5c | ≤0.035 | ≤0.035 | |
| B | ≤0.21 | ≤0.35 | 0.8~1.2 | ≤0.035 | ≤0.035 | |
| D | ≤0.21 | ≤0.35 | 0.6~1.2 | ≤0.035 | ≤0.035 | ≥0.015 |
| E | ≤0.18 | ≤0.35 | 0.7~1.2 | ≤0.035 | ≤0.035 | ≥0.015 |
| AH32 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| DH32 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| EH32 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| FH32 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| AH36 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| DH36 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| EH36 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| FH36 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| AH40 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| DH40 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| EH40 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
| FH40 | ≤0.18 | ≤0.50 | 0.9~1.6 | ≤0.035 | ≤0.035 | ≥0.015 |
Exhibition Of Cooperation
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Packing & Delivery
Shipping By Sea
1. Standard packaging
2. Packaging according to customer requirements
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FAQ
Q: Can I get samples before order ?
A: Yes, of course. Usually our samples are free,we can produce by your samples or technical drawings.
Q: Can I go to your factory to visit?
A: Of course, we welcome customers from all over the world to visit our factory.
Q: What product information do I need to provide?
A: You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.
Q: Does the product have quality inspection before loading?
A: Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept third party inspection.
Q: How do we trust your company?
A: We specialise in steel business for years, headquarter locates in Liaocheng, Shandong province, you are welcome to investigate in any ways, by all means, we have CE and ISO9001 certificate, quality can be guaranteed.
