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Marine steel plate is a specialized high-strength low-alloy steel designed for shipbuilding and offshore structures. It offers excellent weldability, corrosion resistance, and low-temperature toughness, ensuring structural integrity in harsh marine environments. These plates are classified by classification societies such as ABS, LR, DNV, and CCS, with common grades including general strength (A, B, D, E) and high-strength steels (AH32, DH32, EH32, etc.).
Common international grades include ABS (American Bureau of Shipping) grades like ABS A, ABS AH36, and ABS EH40; LR (Lloyd’s Register) grades such as LR A and LR DH36; DNV (Det Norske Veritas) grades including NV A36 and NV D40; and NK (ClassNK) grades like KA36. Other notable standards include ASTM A131 (USA), JIS G3115 (Japan, e.g., SPV235), and EN 10025 (Europe, e.g., S355J2). These grades ensure compliance with global shipbuilding requirements.
For researching marine steel plates internationally, useful English keywords include: “shipbuilding steel plate grades,” “ABS EH36 marine plate,” “DNV certified steel,” “high-tensile marine steel,” “offshore structural steel,” “Lloyd’s Register approved steel,” “corrosion-resistant hull plate,” and “low-temperature marine steel.” Additional terms like “hot-rolled ship plate,” “steel for LNG carrier,” and “EH40 plate supplier” help in sourcing technical data and suppliers.
Marine steel plates are widely used in hull construction, bulkheads, decks, and hatch covers of cargo ships, tankers, container vessels, and naval ships. They are also essential in offshore platforms, floating production storage and offloading (FPSO) units, subsea structures, and ship repair yards. High-strength grades enable weight reduction and increased cargo capacity, making them critical for modern, fuel-efficient vessel design and Arctic-class ships requiring enhanced low-temperature performance.
| steel grade | Yield point | Tensile strength σb (MPa) | Elongation σ% | carbon | manganese | silicon | sulfur | phosphorus |
| σs(MPa)≥ | ≥ | C | Mn | Si | S | P | ||
| AH32 | 315 | 440-570 | 22 | ≤0.18 | 0.9-1.6 | ≤0.50 | ≤0.035 | ≤0.035 |
| DH32 | ||||||||
| EH32 | ||||||||
| FH32 | ≤0.16 | 0.9-1.6 | ≤0.50 | ≤0.025 | ≤0.025 | |||
| AH36 | 355 | 490-630 | 21 | ≤0.18 | 0.9-1.6 | ≤0.50 | ≤0.035 | ≤0.035 |
| DH36 | ||||||||
| EH36 | ||||||||
| FH36 | ≤0.16 | 0.9-1.6 | ≤0.50 | ≤0.025 | ≤0.025 | |||
| AH40 | 390 | 510-660 | 20 | ≤0.18 | 0.9-1.6 | ≤0.50 | ≤0.035 | ≤0.035 |
| DH40 | ||||||||
| EH40 | ||||||||
| FH40 | ≤0.16 | 0.9-1.6 | ≤0.50 | ≤0.025 | ≤0.025 |
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