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Help CenterSteel Sheet & Plate & High-Strength Ship Plate，CCSA/CCSB/CCSD/CCSE、AH32、DH32、EH32、FH32；AH36
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High-strength ship plate, namely hot-rolled steel plates for hull structures, also collectively referred to asship structural steel plate, is a special marine engineering steel plate manufactured in accordance with classification society specifications and specially used for shipbuilding and marine engineering construction. Featuring high strength, excellent low-temperature toughness, seawater corrosion resistance and superior weldability, all products have passed international classification society certifications, serving as core materials for the shipbuilding and marine engineering industries.
1. Material and Grade
1.1 General Strength Ship Plate (Yield Strength ≥235MPa)
Grades: A, B, D, E (corresponding to CCSA/CCSB/CCSD/CCSE)
Impact Temperature: A(0℃), B(0℃), D(-20℃), E(-40℃)
Application: Conventional structural parts of ships such as cargo holds, decks and ship bottoms. It is the most widely circulated category of ship structural steel plate in the market.
1.2 High-strength Ship Plate (Yield Strength: 315–690MPa)
Strength Levels: 32, 36, 40, 420, 460, 500, 550, 620, 690MPa
Quality Grades: A(0℃), D(-20℃), E(-40℃), F(-60℃)
Common Grades: AH32, DH32, EH32, FH32; AH36, DH36, EH36, FH36; AH40, DH40, EH40, FH40
Application: Key stress-bearing parts of large ocean-going vessels, offshore platforms and special ships. High-end high-strength ship plate and marine engineering steel plate all adopt this type of material.
2. Implementation Standards and Certifications
Domestic Standard: GB/T 712-2022 Steel for Hull Structures
International Classification Society Certifications: CCS, ABS, BV, DNV, LR, KR, RINA, etc. All high-strength ship plates, ship structural steel plates and marine engineering steel plates hold valid certification certificates, meeting global procurement standards and complying with the construction and acceptance requirements of various ships and marine projects.
3. Specification Range
Thickness: 3–150mm, divided into thin plate (3–14mm), medium plate (14–50mm) and thick plate (50–150mm)
Width: 1500/1800/2000/2200/2500mm, customized ultra-wide specifications are available
Length: 6000–12000mm. Custom length, special-shaped cutting and beveling processing are supported to match the material demands of various ship and marine engineering construction projects.
4. Delivery Status
AR (As Rolled): Cost-effective, mostly used for medium and thin conventional ship structural steel plates
N (Normalized): Uniform metallographic structure and excellent low-temperature toughness, suitable for thick plates and marine engineering steel plates used in low-temperature sea areas
TMCP (Thermo-Mechanical Control Process): Refined grain structure and balanced strength and toughness, the mainstream production process for current high-strength ship plates
QT (Quenched and Tempered): High strength and thorough stress relief, applicable to ultra-high-strength materials for special ships and marine engineering.
5. Core Chemical Composition (wt%)
C: ≤0.18–0.21; Si: ≤0.50–0.80; Mn: ≤1.30–1.70
P: ≤0.025, S: ≤0.015, harmful impurities are strictly controlled
Alloy elements such as Cu, Cr, Ni and Nb are added as required to further improve the comprehensive performance of high-strength ship plates and marine engineering steel plates.
6. Mechanical Properties (Typical Values)
General Strength Series: Yield strength ≥235MPa, Tensile strength: 400–520MPa, Elongation ≥24%
AH36: Yield strength ≥355MPa, Tensile strength: 490–630MPa, 0℃ Impact Energy ≥34J
EH36: Yield strength ≥355MPa, Tensile strength: 490–630MPa, -40℃ Impact Energy ≥34J
All indicators fully comply with the design and service specifications of ships and marine engineering, ensuring stable performance and high safety of ship structural steel plates.
7. Appearance and Quality Characteristics
The four sides of the plate are neatly cut without burrs or deformation; the surface has uniform oxide scale without defects such as cracks, delaminations and pores.
Steel stamps are marked on the plate surface, including furnace number, batch number, classification society logo and specifications, with labels attached on the side for easy inventory and management.
Every high-strength ship plate has passed ultrasonic testing (UT), meeting the Class I/II testing standards of classification societies for reliable service safety.
8. Application Fields
Shipbuilding: Suitable for the structural construction of bulk carriers, oil tankers, container ships, LNG ships, fishing boats, yachts and other vessels with ship structural steel plates.
Marine Engineering: Serves as the core marine engineering steel plate material for offshore platforms, jackets, offshore wind power foundations, subsea pipelines and other facilities.
Other Fields: High-end heavy industry structural construction such as port machinery, pressure vessels, heavy steel structures and large bridges.
9. Packaging and Delivery Cycle
9.1 Product Packaging
Packaged with waterproof paper and fixed with high-strength steel strips, the products are moisture-proof, rust-proof and collision-resistant. Suitable for long-distance land transportation and ocean shipping, it fully guarantees the intact delivery of high-strength ship plates, ship structural steel plates and marine engineering steel plates.
9.2 Detailed Delivery Cycle
Conventional In-stock Specifications: Common A/B/D/E grade ship plates, general ship structural steel plates such as AH36/DH36 are in sufficient stock, and can be delivered within 3-7 working days after payment confirmation for fast shipment.
Conventional Custom Specifications: Standard fixed-length and simply beveled conventional ship plates have a production cycle of 7-15 working days, and will be delivered immediately after passing quality inspection.
Special Custom Specifications: Extra-wide and extra-thick plates, FH grade low-temperature high-strength ship plates, quenched and tempered ultra-high-strength ship plates and special-shaped processed parts involve complex production processes, with a delivery cycle of 15-30 working days.
Large-batch Orders: For large-tonnage bulk purchase orders, exclusive delivery time can be negotiated according to the production schedule, and phased shipment is supported to fully adapt to the construction progress of customers’marine engineering steel plate projects.
9.3 Payment Terms
Supports mainstream domestic and foreign payment methods such as T/T and L/C. Cooperation terms and payment ratios can be flexibly negotiated.
10. Product Advantages
1. Reliable Quality: Certified by multiple authoritative classification societies, the products are wind and wave resistant, low-temperature resistant and fatigue resistant, perfectly adapting to harsh marine working conditions, making them high-quality marine engineering steel plate materials.
2. Excellent Weldability: Adopting a low-carbon formula design, the plates are easy to weld with beautiful forming and no cracking, greatly reducing the on-site construction difficulty of ship structural steel plates and improving construction efficiency.
3. Durable Service Life: Possessing excellent seawater corrosion resistance and aging resistance, the products maintain stable performance in long-term marine environment service, being cost-effective high-strength ship plate products.
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