Product Overview
Marine Steel Plate, also known as shipbuilding steel plate, is a special structural steel developed exclusively for marine projects in accordance with IACS unified requirements and major classification society rules. Our product portfolio covers ordinary strength grades (A/B/D/E) and high-strength grades (AH32, DH32, EH32, AH36, DH36, EH36, FH36), manufactured via strict hot rolling, controlled rolling, normalized or TMCP thermomechanical forming processes. Raw materials adopt low-carbon micro-alloy design, balancing light weight, structural rigidity and marine anti-corrosion performance, widely applied for hull frames, decks, offshore platform load-bearing components and all kinds of marine equipment.
Why Choose Our Marine Steel Plate?
One-stop marine steel material procurement
Traceable full quality control: 100% raw material spectral detection + ultrasonic flaw inspection for thick plates.
Customized delivery states: HR / CR / N / TMCP multiple rolling processes to match different hull fabrication techniques.
Global marine project supply experience: Bulk export to shipyards, offshore engineering companies worldwide with complete export packaging.
Typical Chemical Composition Limit (High-strength marine plate)
| Element | Maximum Content |
|---|---|
| Carbon (C) | ≤0.18% |
| Silicon (Si) | ≤0.50% |
| Manganese (Mn) | 0.90 – 1.60% |
| Phosphorus (P) | ≤0.035% |
| Sulfur (S) | ≤0.035% |
| Aluminum (Al) | ≥0.015% |
| Microalloy Nb/V/Ti | Controlled trace amount |
Applications
- Ship Hull Core Structure Outer hull shell plates, bilge strakes, keel plates, hull stiffeners, longitudinal & transverse load-bearing frames for bulk carriers, container ships, oil tankers.
- Deck & Superstructure Components Weather deck plates, cabin wall panels, wheelhouse structural plates, hatch cover base plates, stair and support brackets of passenger ships & yachts.
- Offshore Drilling Platforms Jack-up rig leg plates, semi-submersible buoy structural plates, FPSO topside load-bearing frames, seawater pipeline support plates.
- Port & Terminal Facilities Wharf mooring bollard base plates, container crane structural components, breakwater reinforcement steel plates.
- Marine Auxiliary Equipment Anchor machine base plates, pump valve housings, marine pipeline connecting blanks, ship repair replacement steel sections.
Common Usage Problems & Preventive Solutions
- Seawater Corrosion Solution: Shot blasting + marine epoxy anti-rust primer + intermediate & topcoat complete coating system; regular maintenance coating during vessel operation.
- Fatigue Cracking from Long-Term Wave Vibration Solution: Select matched high-strength grade according to vessel tonnage; strictly control welding heat input and avoid sharp structural stress concentration.
- Weld Seam Crack & Deformation Solution: Match dedicated marine welding consumables; preheat thick plates over 25mm before welding, control interlayer cooling speed.
- Uneven Plate Thickness & Surface Defects Solution: Adopt automatic continuous rolling line; surface grinding & sorting before delivery, protective covering during storage & transportation.
- Insufficient Low-Temperature Impact Toughness Solution: Select D/E/F series grades for cold sea routes; provide third-party impact test reports with each batch.
Quality Assurance & Classification Society Certifications
Full Process Traceable Inspection System
- Raw material incoming spectral chemical composition test
- Online rolling mechanical property sampling inspection
- Ultrasonic non-destructive flaw detection for plates above 20mm thickness
- Low-temperature Charpy impact test per grade requirement
- Surface flatness & dimensional tolerance full measurement
- Mill Test Certificate issued complying with EN 10204 Type 3.1 / 3.2
Available official certifications: ABS, CCS, DNV-GL, LR, BV, NK, KR ship survey certification, ISO9001 quality management system, SGS third-party inspection support.
why choose us?
Mass Spot Inventory: Thousands of tons standard marine steel plate in stock for fast 3–7 day delivery.
Full Custom Processing: CNC cutting, beveling, blasting and painting one-stop service to reduce your secondary machining cost.
Professional Marine Technical Team: Provide grade selection guidance according to vessel navigation sea area and tonnage.
Stable Global Logistics: Pallet & wooden case export packaging, bulk & container shipment to all major global shipbuilding ports.
Get the quotation within 24 hours
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our Partners
We trusted by
User Evaluation
Mr. Liu Jun
Qingdao Shipbuilding Factory
Ms. Olsen Inge
Oslo Offshore Engineering Norway
Mr. Rajiv Menon
Singapore Yacht Repair Yard
FAQ
01.What is the difference between A/B/D/E and AH36/DH36/EH36 marine steel?
A/B/D/E are ordinary-strength ship plates with minimum yield 235MPa; AH/DH/EH36 are high-strength grades with 355MPa yield, used for heavy-load hull main structures to save steel weight. The letter A/D/E stands for impact test temperature 0℃/-20℃/-40℃ respectively.
02.Can you supply marine steel plates with ABS & CCS dual certificates?
03.What delivery state is recommended for offshore platform thick plates?
04.Is surface anti-rust treatment included for marine plates?
Standard products come with shot blasting + grey marine anti-rust primer; customized topcoat color and coating thickness are available upon customer demand.
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