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Help CenterSteel Sheet & Plate & Ship Building Plate，AH32、DH32、EH32、FH32，AH36、DH36、EH36、FH36，AH40、DH40、EH40、FH40
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1. Product Overview
Ship Building Plate is a hot-rolled structural steel plate manufactured in strict accordance with major classification society specifications. Featuring excellent low-temperature impact toughness, reliable weldability, fatigue resistance and lamellar tearing resistance, Ship Building Plate serves as the core load-bearing steel material for shipbuilding and marine engineering fields. Our factory mainly supplies two major series: Ordinary Strength Ship Building Plate and High Strength Ship Building Plate. Various grades of Ship Building Plate can meet diverse construction demands for inland waterway ships, ocean-going cargo vessels, container ships, oil tankers and offshore platforms. Adopting mature clean steel smelting and controlled rolling & cooling technology,Ship Building Plate possesses pure internal structure and stable mechanical properties, with optional Z-direction performance and flaw detection. It is widely applied in ship hull shells, decks, bulkheads, hull structural components, offshore drilling platforms and port construction machinery, acting as a special structural steel plate with huge market demand in the global shipbuilding industry.
2. Product Classification
According to strength grade, impact temperature and engineering application, Ship Building Plate is mainly divided into two core categories, covering most ship and marine engineering construction scenarios:
1. Ordinary Strength Ship Building Plate: Ordinary Strength Ship Building Plate features a yield strength level of 235MPa, excellent welding performance and outstanding cost performance, with four impact quality grades: A/B/D/E. Ordinary Strength Ship Building Plate is mostly used for decks, cabin bulkheads and non-critical hull structural parts of inland waterway ships and small and medium-sized sea-going vessels, and is widely selected by shipyards for hull blanking and welding processing.
2. High Strength Ship Building Plate: High Strength Ship Building Plate adopts grain refinement technology by adding niobium, vanadium and other alloy elements, with yield strength ranging from 315MPa to 355MPa. It delivers superior low-temperature toughness and bearing capacity compared with ordinary Ship Building Plate. High Strength Ship Building Plate is ideal for key stress-bearing parts of large bulk carriers, container ships, oil tankers, polar ships and offshore platforms, and is the preferred material for large-scale ocean-going engineering projects.
3. Special-purpose Ship Building Plate: Including Ship Building Plate with Z-direction performance and flaw-detected Ship Building Plate. Custom delivery states such as normalizing and TMCP controlled rolling are available to adapt to special working conditions of thick plate welding and high-stress marine engineering components.
3. Implementation Standards & Material Grades
All Ship Building Plate products are produced in strict compliance with national standards and international mainstream classification society regulations, with pure and controllable material composition. We can provide classification society certificates and quality inspection documents to meet the order requirements of domestic shipyards and export marine engineering projects:
Implementation Standards: GB/T 712-2022, GB/T 709, GB/T 5313 (Z-direction); Classification Society Certification: CCS, ABS, DNV-GL, LR, BV, NK, KR
Ordinary Strength Ship Building Plate Grades: A, B, D, E (CCSA, CCSB, CCSD, CCSE), suitable for inland waterway ships, small and medium-sized sea-going vessels and secondary hull structures
High Strength Ship Building Plate Grades: AH32, DH32, EH32, FH32, AH36, DH36, EH36, FH36, AH40, DH40, EH40, FH40, suitable for key load-bearing parts of large ocean-going ships and offshore platforms
The high-end Ship Building Plate supplied by our factory adopts strict smelting and rolling control with low inclusion content and stable low-temperature impact performance, which effectively reduces the risk of hull welding cracking and improves the service safety of Ship Building Plate in projects.
4. Specification Parameters
4.1 Thickness Range
Conventional thickness: 6mm-100mm. Custom ultra-thick non-standard Ship Building Plate is available to meet the design requirements of different hull and marine engineering structures.
4.2 Width Range
Conventional width: 1500mm-3000mm with strictly controlled width tolerance. Custom cutting according to drawings is supported to improve material utilization rate.
4.3 Length Range
Conventional length: 6000mm-12000mm. Custom fixed and multiple lengths are available to reduce secondary cutting loss for shipyards.
4.4 Surface & Delivery Condition
Delivered in hot-rolled black surface state; optional TMCP controlled rolling, normalizing treatment, Z15/Z25/Z35 Z-direction performance, and Grade 1/2/3 ultrasonic flaw detection. The plate surface is flat and supports cutting, bending and welding processing.
5. Core Product Advantages
1. Excellent Low-temperature Impact Toughness: Manufactured with clean steel smelting technology, Ship Building Plate with A-E and AH-FH grades meets different low-temperature impact standards. Ship Building Plate maintains stable impact resistance in cold sea areas, ensuring the safe operation of hulls in complex marine environments.
2. Stable and Reliable Welding Performance: Ordinary Strength Ship Building Plate and High Strength Ship Building Plate feature reasonable carbon equivalent control and stable performance of welding heat-affected zones, avoiding welding cracks during hull plate splicing and adapting to mass welding operations in shipyards.
3. Fatigue and Lamellar Tearing Resistance: High-quality Ship Building Plate contains few internal impurities.Ship Building Plate with additional Z-direction performance further improves the thickness-direction tearing resistance, ideal for thick-plate high-stress welded joints.
4. Certified by Mainstream Classification Societies: Qualified Ship Building Plate holds certification certificates from CCS, ABS, DNV-GL and other authoritative classification societies, complying with ship classification audit standards and applicable for bidding of domestic and international shipbuilding projects.
5. Complete Specifications and Customization Support: The thickness, length and width of Ship Building Plate can be customized. Custom services for Z-direction performance, flaw detection and heat treatment are available to match the drawing requirements of various ships and marine engineering projects.
6. Stable Supply for Project Schedules: Standard-grade Ship Building Plate is in sufficient stock for mass delivery. Special thick-plate specifications can be scheduled for production to adapt to the construction progress of shipyards and marine engineering projects.
6. Main Application Scenarios
1. Civil Shipbuilding Industry: Ship Building Plate is widely used for the hull shell, decks and bulkheads of bulk carriers, container ships, oil tankers and ro-ro ships; Ordinary Strength Ship Building Plate is applied to the construction of inland waterway ships and small and medium-sized sea-going vessels.
2. Ocean-going and Polar Ship Projects: AH36/DH36/EH36 series High Strength Ship Building Plate is used for key stress-bearing components of large ocean-going ships and ice-reinforced ships to resist alternating loads in complex sea conditions.
3. Offshore Engineering Platforms: High Strength Ship Building Plate is adopted for the main structures of offshore drilling platforms, floating production storage and offloading units, and offshore jackets, resisting marine wind, wave and seawater erosion.
4. Port Construction Machinery Equipment: Ship Building Plate is used for structural parts of port cranes, terminal mechanical equipment and floating cranes, adapting to humid and high-salinity marine atmospheric environments.
5. Ship Supporting Steel Structures: Most ship superstructures, internal hull components and ship storage tanks are fabricated by cutting and welding Ship Building Plate.
6. Special Marine Equipment: Engineering operation ships, search and rescue ships and fishery processing ships are massively equipped with graded Ship Building Plate to meet ship inspection specifications.
7. Processing Methods
1. Flame / Plasma Cutting Processing: Ship Building Plate can be cut and blanked according to drawings to manufacture various special-shaped hull components, meeting the production needs of ship parts.
2. Bending and Rolling Processing: Ship Building Plate can be bent and rolled into shapes to fabricate curved hull shells, tanks and other components.
3. Plate Splicing and Welding Processing: Ordinary Strength Ship Building Plate and High Strength Ship Building Plate can be directly spliced and welded to form large-scale structures such as hull decks and bulkheads.
4. Heat Treatment Processing: Partial Ship Building Plate can be subjected to subsequent normalizing and tempering treatment to further optimize material toughness for harsh low-temperature marine engineering working conditions.
8. Packaging, Quality Inspection & Delivery
1. Packaging Standard: Finished Ship Building Plate is multi-point reinforced with steel strapping bands and supported by wooden battens at the bottom. Export orders adopt marine moisture-proof packaging to avoid salt spray corrosion during long-distance ocean transportation.
2. Quality Inspection Guarantee: Each batch of Ship Building Plate undergoes chemical composition analysis, tensile test and low-temperature impact test. Ultrasonic flaw detection and Z-direction tensile test are implemented on demand. We can provide classification society certificates and MTC material reports, and support third-party witnessed ship inspection.
3. Delivery Cycle: Standard-grade and standard-specification Ship Building Plate, Ordinary Strength Ship Building Plate and High Strength Ship Building Plate are in sufficient stock and delivered within 5-7 working days. Custom thick plates with heat treatment, Z-direction performance and flaw detection are delivered within 10-20 working days.
4. Logistics Distribution: Support full-truck domestic transportation and port docking for export shipment, adapting to international trade terms such as FOB and CIF.
9. Storage & Usage Precautions
1. Ship Building Plate is preferably stored in a ventilated and dry yard with height isolation from the ground. Yards near the sea must be covered with rainproof and salt spray-proof materials to reduce plate surface rusting, as excessive rust will affect subsequent welding and flaw detection results.
2. Ordinary Strength Ship Building Plate and High Strength Ship Building Plate shall be stacked separately by grade, impact level and thickness with clear marks. Mixing and misapplication are strictly prohibited to prevent hull components from failing to meet classification society specifications.
3. Special lifting tools and clamps must be used for handling Ship Building Plate. Direct scratching of the plate surface by steel wires is forbidden to avoid surface defects affecting flaw detection accuracy.
4. Select graded Ship Building Plate according to the actual sea area environment of the project. Ordinary Strength Ship Building Plate cannot replace High Strength Ship Building Plate for low-temperature and ice-area marine engineering projects to avoid the risk of hull low-temperature brittle fracture.
5. Welding of Ship Building Plate must strictly follow classification society welding procedure qualification. Z-direction performance Ship Building Plate shall be adopted for thick-plate components when necessary to prevent welding lamellar tearing.
10. Supporting Derivative Products
- Z-direction Ship Building Plate: Z15/Z25/Z35 grades, optimizing the plasticity of steel plates in the thickness direction, used for high-stress welded key joints of thick plates with excellent lamellar tearing resistance
- Flaw-detected Ship Building Plate: Grade 1/2/3 ultrasonic flaw-detected Ship Building Plate with strictly controlled internal defects, suitable for core load-bearing parts of offshore platforms
- Custom Cut Ship Building Plate: Processed from original Ship Building Plate according to construction drawings, providing one-stop supply of fixed-size plates and special-shaped parts
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