BV Marine steel sheet Material
BV is a ship plate certified by Bureau Veritas. This standard specifies the size, shape, technical requirements, inspection and testing, packaging, marking and inspection documents of hot rolled steel plates and steel strips used for ship hull structures.
GNEE BV ship steel plates have passed rigorous audits and certification by Bureau Veritas (BV) and meet the standards of nine classification societies, including CCS, ABS, DNV, LR, NK, KR, and RINA. Each steel plate comes with an EN 10204 Type 3.2 certificate of conformity, and the furnace number and batch number are fully traceable throughout the entire process.
Extreme Performance · Confidently Handled
Produced using advanced TMCP (Thermomechanical Control Process) controlled rolling and cooling, along with normalization, the measured low-temperature impact energy at -40°C remains consistently above 260 J, far exceeding the requirements of classification societies. Whether for icebreakers on Arctic routes or deep-sea drilling platforms, our steel plates maintain exceptional toughness in extreme environments, eliminating the risk of low-temperature brittle fracture.
Precision Dimensions · Cost Reduction and Efficiency
Our stock inventory covers the full range of specifications, with thicknesses from 6 mm to 700 mm and widths from 1,500 mm to 4,800 mm. We offer custom cutting and delivery services, precisely cutting to your layout drawings to reduce scrap waste by over 15%. We also support additional customizations such as Z15–Z35 laminar tear resistance (Z-direction performance) and UT ultrasonic testing (ASTM A435/A578), meeting the highest safety requirements for critical hull components.
Guaranteed Stock · Rapid Response
We maintain a stock of 5,000 tons of BV-certified ship plates, with orders shipped within 24 hours of placement. Delivery for forward orders is 30 days, which is two weeks faster than the industry average.
BV A Marine steel MTC
BV AH36 Marine steel MTC
The grades of BV standard ship plates we can provide include:
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BV Steel Plate Grade |
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General Strength |
BV/A |
BV/B |
BV/D |
BV/E |
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High Strength |
BV/AH32 |
BV/DH32 |
BV/EH32 |
BV/FH32 |
|
BV/AH36 |
BV/DH36 |
BV/EH36 |
BV/FH36 |
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BV/AH40 |
BV/DH40 |
BV/EH40 |
BV/FH40 |
|
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Extra Strength |
BV/A420 |
BV/D420 |
BV/E420 |
BV/F420 |
|
BV/A460 |
BV/D460 |
BV/E460 |
BV/F460 |
|
|
BV/A500 |
BV/D500 |
BV/E500 |
BV/F500 |
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|
BV/A550 |
BV/D550 |
BV/E550 |
BV/F550 |
|
|
BV/A620 |
BV/D620 |
BV/E620 |
BV/F620 |
|
|
BV/A690 |
BV/D690 |
BV/E690 |
BV/F690 |
|
BV standards marine steel plate mechanical property
| Grade | Thickness | Yield Strength | Tensile Strength | Elongation | Impact Energy |
| (mm) | MPa (min) | MPa | % (min) | (KV J) (min) | |
|
|
|
|
|
20 degree | |
| BV Grade A Shipbuilding Steel | 8-220 | 335 | 400-520 | 22 |
|
Grade |
Thickness |
Yield Strength |
Tensile Strength |
Elongation |
Impact Energy |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
0 degree |
|
|
BV Grade B |
4-260 |
235 |
400-520 |
22 |
27J |
Grade |
Thickness |
Yield Strength |
Tensile Strength |
Elongation |
Impact Energy |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
-20 degree |
|
|
BV Grade D |
4-260 |
235 |
400-520 |
22 |
27J |
Grade |
Thickness |
Yield Strength |
Tensile Strength |
Elongation |
Impact Energy |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
-20 degree |
|
|
BV Grade E |
4-260 |
235 |
400-520 |
22 |
27J |
Primary Applications
Liquefied Natural Gas Carriers (LNGCs)
With 70 years of experience in LNG vessel classification, BV Shipbuilding Steel Plate is one of the world's leading classification societies for LNG carriers. Its specialized regulations for cryogenic cargo containment systems-such as technical assessments of membrane tank technology-are extremely rigorous, ensuring absolute safety under extreme operating conditions of -163°C.
Floating Storage and Regasification Units (FSRUs) and Floating Production, Storage, and Offloading Units (FPSOs)
BV Hull Structure Steel Plate ranks first globally in this field, having serviced over 200 floating units. It offers a unique IVB+ Class (Independent Verification Body + Classification) service, providing dual assurance for high-risk offshore assets.
Dynamic Positioning Vessels and Specialized Engineering Vessels
For complex vessel types equipped with DP2 dynamic positioning systems (such as platform supply vessels), BV Marine Steel Plate was among the first classification societies to establish the relevant additional notation (DYNAPOS), enabling precise assessment of propulsion system redundancy and electrical system reliability.
Chemical Tankers
BV High Strength Ship Plate maintains extremely stringent certification standards for corrosion-resistant materials. For example, BV certification of duplex stainless steel composite plates signifies the acquisition of an industry-recognized "corrosion resistance passport," ensuring effective resistance to corrosion from hazardous cargoes.
Polar-class vessels
BV Hot Rolled Ship Steel Plate features specialized specifications for ice-class navigation (ICE CLASS), with control requirements for low-temperature toughness of steel plates at -40°C or lower-particularly the impact energy of EH-grade steel plates-that far exceed conventional standards.
Equivalent Grades Comparison
Marine steel is standardized globally across classification societies. If your project specifies a different standard, BV steel is often equivalent to:
| BV Grade | ABS (USA) | LR (UK) | DNV (Norway/Germany) | CCS (China) |
| BV Grade A | ABS Grade A | LR Grade A | DNV Grade A | CCS Grade A |
| BV AH36 | ABS AH36 | LR AH36 | DNV AH36 | CCS AH36 |
| BV EH36 | ABS EH36 | LR EH36 | DNV EH36 | CCS EH36 |
BV Grade A VS ABS Grade A
1. Grade Interchangeability
From a technical standards perspective, BV Grade A and ABS Grade A are essentially equivalent-both have a yield strength of 235 MPa, their chemical composition control ranges are largely consistent, and both can be used for general-strength structural components in ship hulls.
2. Differences in Elongation
In some standards, BV Grade A requires an elongation of 22%, while ABS Grade A specifies 18–22% depending on the sampling direction. This implies that BV steel plates may exhibit slightly better plastic deformation capacity in certain specifications.
3. Differences in Certification Systems
BV: As a French classification society, it enjoys high recognition in projects involving European and African shipowners, particularly in the field of high-end vessel types such as LNG carriers and FSRUs, where it possesses deep technical expertise.
ABS: As an American classification society, it holds a traditional advantage in the North American market and in projects supplying the U.S. Navy.
FAQ
What is the difference between AH36 and AH40?
The fundamental practical distinction between AH36 and AH40 lies in their design strength level and the metallurgical measures used to achieve it: AH40 is produced to a higher minimum-strength class than AH36, which influences required alloying, thermo-mechanical processing, and resulting ductility/toughness tradeoffs.
Is AH36 the same as A36?
In this condition, ASTM AH36 steel and A36 steel is totally the same. However, at most times, ASTM A36 steel means another steel type, it is A36 mild steel. A36 mild steel is for general construction, seldom used for ship building. A36 mild steel strength is lower than ASTM AH36 shipbuilding steel strength.
Why Choose GNEE STEEL?
- Global Supply Chain: We have successfully exported BV-certified steel to over 60 countries, including the Middle East, Southeast Asia, and Europe.
- Inventory Capacity: We maintain a massive stock of standard sizes for immediate shipment.
- Processing Services: Precision cutting (CNC, Laser, Plasma), drilling, and bending to your exact specifications.
- Third-Party Inspection: We welcome inspections by BV, SGS, or Intertek to guarantee quality.
Conclusion
When it comes to maritime safety and structural longevity, there is no room for compromise. GNEE STEEL's BV Marine Steel Plates offer the perfect balance of strength, durability, and cost-efficiency. Whether you are building a merchant vessel or a deep-sea platform, our steel meets the rigorous standards of Bureau Veritas.
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BV standards metal used in shipbuilding Products image
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Relying on many first-class equipment, such as CNC Shearing machine, Press Brake machine, Straightening machine, Roll Bending machine, Flat Bar Machine, Deburring machine etc, GNEE STEEL could provide various semi-productsand extensive forming services to customers.
GNEE STEEL PROCESSING
1.CTL & SL SERVICE (141 SETS)
Currently, GNEE STEEL has imported manyadvanced CTL/SL equipment from Italy and Korea and could provide customized CTL/SL services from cold rolled stainless steel and carbon steel to hot rolled stainless steel and carbon steel as well as strips and ultra-wide sheet.
CTL FACILITIES
Max Length:16500mm
Max Width:2200mm
Max Thickness:25.4mm
Max Yield Strength:1500Mpa
SL FACILITIES
Max Width:2200mm
Max Thickness:18mm
Max slit Quantity:31
Max Yield Strength:1200Mpa
2.CUTTING SERVICE
GNEE STEEL imported lots of advanced cutting machines from Germany, Sweden, America and Japan, including plasmas cutting machine, water jet cutting machine, laser cutting machine, flame cutting machine and saw machine. In order to meet customers' diversified needs, GNEE STEEL also adopts nest working multi-cutting methods and intensive production to improve production capacity and save costs for the customers.
Laser Cutting Machine
Max Cutting Length:40,000mm
Max Width:4,600mm
Max Thickness:100mm
Flame Cutting Machine
Max Cutting Length:40,000mm
Max Width:8,000mm
Max Thickness:500mm
Plasmas Cutting Machine
Max Cutting Length:30,000mm
Max Width:5,000mm
Max Thickness:100mm
Water-jet Cutting
Max Cutting Length:12,000mm
Max Width:4,010mm
Max Thickness:250mm
3.FORMING SERVICE
Steel Plate Roll Bending
Maximum Rolling Thickness: up to 200mm
Maximum Width: 4200mm
Automatic Bending Machine-Press Brake
Max Bending Capability:3000Ton
Max Bending Length:15,000mm
Expert in Bending High-Strength & Wear-Resistant Steels
Punching Machine
Max Width:3,070mm
Max Thickness:8mm
Max Pressure:250t
BEVELING SERVICE
GNEE STEEL beveling platform has edge milling machine, edge planer, flame / plasma groove cutting machine, flame groove cutting robot, desktop chamfering machine, gantry planerand other advanced equipment to provide customers with parts prefabrication services,daily processing of V-type, Y-type, X-type and U-type grooves, and guarantee subsequent processes such as welding and assembly of products.
Milling：
Max Cutting Length:18,000mm
Max Width:4500mm
Max Thickness:120mm
Beveling:
Max Length:16,000mm
Max Thickness:80mm
MACHINING SERVICE
GNEE STEEL owns CNC Portal-type Boring and Milling machine,CNC Floor-type Boring and Milling machine, Vertical Precision 5-axis Milling Machine, Portal-type Planer, Vertical Lathe, Cylindical Grinding machine, Hydraulic Planer and CNC Lathe and could provide fine machining of large spare parts and structural parts for customers.
Gantry Type Boring & Milling Maching Center
Max Length:48000mm
Max Width:12500mm
Max Height:8000mm
Max Diameter:10500mm
Deep-hole Drilling Equipment
Max Driling Depth:1,100mm
Max Bore Diameter:φ80mm
Max Diametar:φ4,500mm
MMulti-hole Drilling Equipment
Max Length:13,000mm
Max Width:10,000mm
Max Bore Diameter:φ105mm
Max Drilling Depth:250mm
Floor Boring And Milling Machine
Max Length:24,000mm
Max Height:8,000mm
Turntable Dimensions:9x5m
Vertical Lathe
Max Height:6,000mm
Max Diametar:φ22,00mm
Automated Edge Milling Machine
The Automated Edge Milling Machine is a leading product in heavy-duty milling equipment. It is primarily used for weld groove preparation (beveling) on large-format plates made of stainless steel, carbon steel, and special steel grades. It can process plates with a maximum thickness of up to 90mm, a length of 16 meters, and a width of 4 meters.
It is equipped with dual milling units and a fully automatic milling cutter head changing system, enabling automated 4-edge beveling. Its standout feature is the profiling technology used when milling wavy plates and irregularly shaped products, which ensures absolute consistency of the groove after milling.
Utilizing specially designed milling cutter heads, it can execute highly difficult and complex groove profiles in a single pass.
Materials: Plain carbon steel, pressure vessel steel, wear-resistant steel, high-strength steel, stainless steel, nickel-based alloys, etc.
Width: 1200 - 4200 mm
Length: 5800 - 16000 mm
Thickness: 5 - 90 mm
Weight: Up to 35 tons
This edge milling machine is the world's premier automated bevel milling equipment. With its excellent structural design and advanced data algorithms, it achieves full automation from plate detection to the actual milling process, significantly improving processing efficiency while guaranteeing high precision.
- Processing Accuracy
Length accuracy: ±1mm when L < 10m; ±2mm when L > 10m;
Width accuracy: ±1mm;
Diagonal accuracy: ±2mm;
Root face accuracy (blunt edge): ±1mm for Y-grooves; +0.5mm for X-grooves.
- Processing Efficiency
The processing efficiency is more than 10 times that of conventional edge milling or edge planing equipment.
HEAT TREATMENT
Heat Treatment Furnace
Max Furnace Size:36x12x13.5m
Max Rated Temperature:1100℃
Max Loading Capacity:800t
Heat Treatment of Pressure Vessels
Heat Treatment of Mining Equipment
Heat Treatment of Tube Sheet
Heat Treatment of Pressure Vessel Head
Case : Steel Plates Supply for 100,000m³ Full Containment Ammonia Storage Tank Project
GNEE STEEL is currently participating in the procurement phase of a 100,000m³ full containment ammonia storage tank project, supplying high-quality steel plates for critical tank components. Due to the corrosive nature of ammonia and the risk of Ammonia Stress Corrosion Cracking (SCC), the project requires strict metallurgical control of materials according to EN 10028-3 standards.
One of the most important technical requirements of this project is the strict limitation of the actual Yield Strength (Re) for all NL2 grade materials. To prevent SCC risks in ammonia storage environments, the actual yield strength must not exceed 390 MPa, regardless of the nominal values specified in the standard or plate thickness ranges. This requirement places higher demands on steelmaking process control, heat treatment stability, and material testing.
Raw high-strength steel plates ready for the 100,000 m³ full containment ammonia storage tank production
Project Materials and Technical Requirements
The project mainly uses P355NL2 and P275NL2 normalized pressure vessel steel plates, which are widely applied in low-temperature storage tanks due to their excellent toughness and weldability.
Key technical specifications include:
- Material grades: P355NL2 and P275NL2 (Normalized)
- Yield strength: Standard minimum / Maximum limited to 390 MPa
- Hardness: ≤ 225 HBW in base material
- Impact testing: Charpy-V notch test at -50°C, minimum 27J
- Certification: EN 10204 3.1 certificate, with optional 3.2 certification
These strict requirements ensure that the steel plates maintain stable mechanical properties and high resistance to ammonia-induced stress corrosion during long-term operation.
Precision rolling and forming of steel plates into curved sections for the 100,000 m³ ammonia storage tank.
Project Plate Quantities and Thickness Distribution
The total steel demand for this ammonia storage tank project is several thousand tons, mainly distributed across different tank sections:
P355NL2 – Inner & Outer Tank Shell Plates
- Lower shell courses: 50 mm thickness – approx. 2,000 tons
- Middle shell courses: 25 mm thickness – approx. 1,400 tons
- Upper shell courses: 10 mm thickness – approx. 500 tons
P275NL2 – Tank Bottom Plates
- Thickness: 10–15 mm – approx. 750 tons
P275NL2 – Suspended Roof Structure
- Thickness: 5–8 mm – approx. 180 tons
S275JR – Outer Roof (Ambient Structure)
- Thickness: 10 mm – approx. 450 tons
To improve tank fabrication efficiency and reduce circumferential welds, the project also requires wide steel plates to minimize welding joints, which helps reduce the potential risk of SCC in ammonia service conditions.
Formed steel segments wrapped and racked for protection, ready for 100,000 m³ ammonia storage tank assembly.
GNEE STEEL provides high-precision steel plate rolling and cylinder fabrication solutions for tank manufacturers worldwide. Send us your plate specifications or fabrication drawings for a fast quotation.
| TYPE | GRADE | SPECIFICATIONS |
| Carbon Steel / Low Alloy Coil | Q235A/B/C/D/Q355B(Q345B)/C/D/E/SS400/SAPH400-C/ASTMA283Grade C |
0.7~2.0*1250/1500mm*C 2.3~19.5*1250/1500/1800/2000mm*C |
| Medium Heavy Plate | Q235B/Q355B(Q345B)/C/D/E | 6.0-200x150mm-4000mmxL |
| Vessel Plate |
Q245R/Q345R/HP295/SA516MGR485/SA516GR70/P355NL2/P275NL2/ S275JR//SPV490/ASTM A537 Class 1/Class 2 |
2.5-120x1500mm-3000mmxL |
| High Strength Steel |
510L/610L/700L/750L/BS600MCK4/BS700MCK2/BS700MCK4/ BS960E/BWELDY700QL2/L4/BWELDY960QL4/HG60D/70D/785D/ Q460D/Q550D/690D/690E/TQ600MCD/TQ700MCD/S700MCD/ WYS600/700/STRENX700MCE/Q490E/Q490D |
1.2-60x 1500mm-2500mmxL |
| Patterned Steel | HQ235A|B | 1.2-60x 1500mm-2500mmxL |
| Wear-resistance Steel |
NM360/400/450/500/NM300TP/400TP/450TP/ ABREX400/450/500/B-HARD450XKY/ CREUSABRO4800/8000/EH C400LE/450LE/500LE/ |
3.0-50x1250mm-3300mmxL |
| Cold Rolled Coil | DC01/RECC/REDT/SPCC/ST12 | 0.5-3.0x1250mm-1500mmxC |
| Galvanized Plate | DC51D+AZ/DC51D+Z/DX51D+Z/SGH340+Z275/Z275/Z120/S350GD+ZM275 | 0.45-3.0x1250mm-1500mmxC |
| Pickled Coil | DD11/SPHC | 2.0-6.0x1500xC |
Stainless Steel Material and Surface Specifications
| TYPE | GRADE | THICKNESS | SURFACE |
| Austenitic | 304/304H/304L/304J1 | 0.25-150mm | 2B/BA/NO.4/8K/SB/HL/NO.1 |
| Austenitic | 321 | 0.4-80mm | 2B/BA/NO.4/8K/SB/HL/NO.1 |
| Austenitic | 316/316L/317L/316Ti | 0.3-80mm | 2B/BA/NO.4/8K/SB/HL/NO.1 |
| Austenitic | 201(J1/J2/J5) | 0.35-12mm | 2B/NO.1/1D |
| Ferrite | 430 | 0.4-3.0mm | 2B/BA/NO.4/8K/SB/HL |
| Ultra Pure Ferrite | 443 | 0.4-2.0mm | 2B |
| Ultra Pure Ferrite | 436L/439/444/441 | 0.5-3.0mm | 2B/2D |
Special Steel / Nickel Base Alloy
| TYPE | GRADE | GRADE (ASTM) | GRADE (EN) | THICKNESS |
| Heat-resistant Steel | 309S | S30908 | 1.4833 | 0.5-40mm |
| Heat-resistant Steel | 310S | S31008 | 1.4845 | 0.5-40mm |
| Duplex Stainless Steel | 2101 | S32101 | 1.4162 | 1.5-50mm |
| Duplex Stainless Steel | 2304 | S32304 | 1.4362 | 3.0-50mm |
| Duplex Stainless Steel | 2205 | S32205/S31803 | 1.4462 | 0.5-60mm |
| Duplex Stainless Steel | 2507 | S32750 | 1.4410 | 1.0-60mm |
| Super Austenitic-Steel | 904L | N08904 | 1.4539 | 0.6-50mm |
| Super Austenitic-Steel | 254SMO | S31254 | 1.4547 | 0.5-50mm |
| Super Austenitic-Steel | 1.4529 | N08926 | 1.4529 | 0.5-50mm |
| Super Austenitic-Steel | AL-6XN | N08367 | 1.4478 | 0.5-50mm |
| Nickel Base Alloy | Alloy 31 | N08031 | 1.4562 | 1.0-50mm |
| Nickel Base Alloy | 800 | N08800 | 1.4876 | 0.8-50mm |
| Nickel Base Alloy | 800H | N08810 | 1.4958 | 0.8-50mm |
| Nickel Base Alloy | 800HT | N08811 | 1.4959 | 0.8-50mm |
| Nickel Base Alloy | Alloy 28 | N08028 | 1.4563 | 1.0-20mm |
| Nickel Base Alloy | Alloy 20 | N08020 | 2.4660 | 1.0-20mm |
| Nickel Base Alloy | 825 | N08825 | 2.4858 | 0.8-40mm |
| Nickel Base Alloy | C276 | N10276 | 2.4819 | 0.5-50mm |
| Nickel Base Alloy | C22 | N06022 | 2.4602 | 1.0-50mm |
| Nickel Base Alloy | 625 | N06625 | 2.4856 | 0.8-20mm |
| Nickel Base Alloy | 400 | N04400 | 2.4360 | 1.0-20mm |
| Nickel Base Alloy | 600 | N06600 | 2.4816 | 1.0-50mm |
| Nickel Base Alloy | Pure Ni 201 | N02201 | 2.4061 | 0.5-20mm |
| Titanium | TA1 | Gr.1 | Class 1 | 0.5-50mm |
| Titanium | TA2 | Gr.2 | Class 2 | 0.5-50mm |
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