DNV-GL Hull Structural Steel Plate

DNV-GL Hull Structural Steel Plate

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GNEE's DNV ship plates cover normal strength grades (NV A/B/D/E) and high-strength grades (NV AH32/EH32 as well as AH40/EH40), and also offer ultra-high strength steel grades ranging from D460 to D620 with a yield strength of 460MPa to 620MPa. The thickness range covers 4–260mm, with a full range of delivery conditions available, including AR, TMCP, normalized and QT.

 

Our DNV ship plates feature the following core advantages:

 

For ultra-large container ships and polar navigation vessels, our steel plates have dual performances of crack initiation inhibition and brittle crack arrest. Compliant with the latest IACS URI2 regulations, they can prevent crack propagation under severe conditions of -10°C to fully safeguard hull safety.

 

Strict low-temperature toughness performance – Grade D and higher materials ensure stable compliance with impact energy requirements at -20°C. Ultra-high strength grades such as D460 and D620 also meet low-temperature service demands at -20°C, ideal for ice route and polar navigation ships.

 

Full-process traceability system – Each steel plate is supplied with a DNV-approved EN10204 3.2 quality certificate. The steel stamp, lifting tag and certificate are completely consistent, realizing 100% traceability for surveyor on-site random inspections and eliminating rejection risks.

 

High-precision flatness control: The wave degree is controlled within 2mm per meter, effectively reducing thermal straightening costs.

 

Low welding cold crack sensitivity: We provide recommended welding heat input parameters. Suitable for high heat input welding, it can boost block assembly and construction efficiency by 30%.

 

Professional nesting cutting and delivery services are available: Pre-cutting processing based on your design drawings reduces on-site material waste and improves yard turnover efficiency.

 

DNV A36 MTC

 

GL Steel Plate Grade
General Strength	GL-A	GL-B	GL-D	GL-E
High Strength	GL-A32	GL-D32	GL-E32	GL-F32
	GL-A36	GL-D36	GL-E36	GL-F36
	GL-A40	GL-D40	GL-E40	GL-F40
Extra Strength	GL-A420	GL-D420	GL-E420	GL-F420
	GL-A460	GL-D460	GL-E460	GL-F460
	GL-A500	GL-D500	GL-E500	GL-F500
	GL-A550	GL-D550	GL-E550	GL-F550
	GL-A620	GL-D620	GL-E620	GL-F620
	GL-A690	GL-D690	GL-E690	GL-F690

 

 

Grade	C%≤	Mn %	Si %	p % ≤	S % ≤	Al %	Nb %	V %
A	0.22	≥ 2.5C	0.10~0.35	0.04	0.40	-	-	-
B	0.21	0.60~1.00	0.10~0.35	0.04	0.40	-	-	-
D	0.21	0.60~1.00	0.10~0.35	0.04	0.04	≥0.015	-	-
E	0.18	0.70~1.20	0.10~0.35	0.04	0.04	≥0.015	-
A32 D32 E32	0.18	0.70~1.60 0.90~1.60 0.90~1.60	0.10~0.50	0.04	0.04	≥0.015	-	-
A36 D36 E36	0.18	0.70~1.60 0.90~1.60 0.90~1.60	0.10~0.50	0.04	0.04	≥0.015	0.015~0.050	0.030~0.10

 

 

Grade	Thickness (mm)	Yieldpoint (Mpa) ≥	Tensile Strength (Mpa)	Elongation (%)≥	V-impact test			cold bend test
					Temperature (℃)	Average AKV A kv /J		b=2a 180°	b=5a 120°
						lengthways	crosswise
						≥
A	≤50	235	400~490	22	-	-	-	d=2a	-
B					0	27	20	-	d=3a
D					-10
E					-40
A32	≤50	315	440~590	22	0	31	22	-	d=3a
D32					-20
E32					-40
A36	≤50	355	490~620	21	0	34	24	-	d=3a
D36					-20
E36					-40

 

 

Thickness (mm)	theoretical weight		Thickness (mm)	theoretical weight
	Kg/ft2	Kg/m2		Kg/ ft2	Kg/m2
6	4.376	47.10	25	18.962	196.25
7	5.105	54.95	26	20.420	204.10
8	5.834	62.80	28	21.879	219.80
10	7.293	78.50	30	23.337	235.50
11	8.751	86.35	32	25.525	251.20
12	10.21	94.20	34	26.254	266.90
14	10.939	109.90	35	27.713	274.75
16	11.669	125.60	40	29.172	314.00
18	13.127	141.30	45	32.818	353.25
20	14.586	157.00	48	35.006	376.80
22	16.044	172.70	50	36.464	392.50
24	18.232	188.40

 

 

nominal thickness(mm)	The thickness deviation with following width (mm)
	≤1200	>1200~1500	>1500~1800	>1800
>6.0~8.0	±0.29	±0.30	±0.31	±0.35
>8.0~10.0	±0.32	±0.33	±0.34	±0.35
>10.0~12.0	±0.35	±0.36	±0.37	±0.43

 

nominal thickness(mm)	minus deviation (mm)	The thickness deviation with following width (mm)
		> 1000 ~1200	> 1200 ~1500	> 1500 ~1700	> 1700 ~1800	> 1800 ~2000	> 2000 ~2300	> 2300 ~2500	> 2500 ~2600	2600 ~2800	> 2800 ~3000
>12~25	-0.8	+0.2	+0.2	+0.3	+0.4	+0.6	+0.8	+0.8	+1.0	+1.1	+1.2
>25~30	-0.9	+0.2	+0.2	+0.3	+0.4	+0.6	+0.8	+0.9	+1.0	+1.1	+1.2
>30~34	-1.0	+0.2	+0.3	+0.3	+0.4	+0.6	+0.8	+0.9	+1.0	+1.2	+1.3
>34~40	-1.1	+0.3	+0.4	+0.5	+0.6	+0.7	+0.9	+1.0	+1.1	+1.3	+1.4
>40~45	-1.2	+0.4	+0.5	+0.6	+0.7	+0.8	+1.0	+1.1	+1.2	+1.4	+1.

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Application Fields	Why DNV Is More Suitable Than Other Classification Societies
Ultra-Large Container Ships (20,000TEU+)	DNV took the global lead in launching the Brittle Fracture Arrest (BSM) specification. Its steel plates feature outstanding crack propagation resistance, adopting the most stringent criteria to address fatigue fracture risks of super-large hull structures.
Polar / Ice-Class Vessels	DNV maintains the world's most comprehensive Ice Class regulations, with far stricter requirements for low-temperature impact toughness than other classification societies. It delivers more reliable performance verification ranging from -20°C to -40°C.
Floating Production Storage and Offloading Units (FPSO)	As the classification society with the largest number of offshore engineering certifications worldwide, DNV has a mature evaluation system for fatigue design, corrosion allowance and Z-direction performance of thick steel plates.
LNG / LPG Low-Temperature Transport & Storage Vessels	DNV boasts the richest experience in the certification of low-temperature materials (9% nickel steel, stainless steel clad plates) and has long-term cooperation with major global cargo tank designers such as MOSS and GTT.
Luxury Cruise Ships / Ro-Pax Vessels	DNV has the most complete system of additional class notations for shock resistance, fire protection and impact resistance (e.g., SEVIB), fully meeting shipowners' strict requirements for comfort and safety redundancy.

 

 

Our Grade (DNV-GL)	Type	ABS (USA)	CCS (China)	BV (France)	LR (UK)	NK (Japan)	KR (South Korea)
DNV-GL A	Normal Strength	ABS A	CCS A	BV A	LR A	NK A	KR A
DNV-GL B	Normal Strength	ABS B	CCS B	BV B	LR B	NK B	KR B
DNV-GL AH36	High Strength	ABS AH36	CCS AH36	BV AH36	LR AH36	NK AH36	KR AH36
DNV-GL FH36	High Strength	ABS FH36	CCS FH36	BV FH36	LR FH36	NK FH36	KR FH36
DNV-GL F460	Extra High Strength	ABS FQ47	CCS F460	BV F460	LR FH46	NK KF47	KR F47

 

 

DNV-GL Hull Structural Steel Plate is a high-performance, high-reliability marine structural steel that strictly complies with DNV-GL standards and IACS unified requirements, with excellent corrosion resistance, low-temperature toughness, weldability, and load-bearing capacity. It is divided into normal strength, high strength, and extra high strength grades, covering the needs of various shipbuilding and offshore engineering projects, from small civilian ships to large tankers and deep-sea drilling platforms.

 

Compared with other marine steel grades, DNV-GL hull structural steel has obvious advantages in international recognition, quality control, and adaptability to harsh environments, and is widely recognized by global shipyards and classification societies. DNV-GL's strict technical requirements for steel plates ensure that the products can stably serve in extreme marine environments such as low temperatures and deep seas.

 

GNEE STEEL is committed to providing high-quality DNV-GL hull structural steel plates and professional one-stop services, from product selection to after-sales support, to help you reduce costs, improve efficiency, and ensure the safety and reliability of your shipbuilding and offshore projects. Whether you need standard specifications or customized solutions, we can meet your needs with our strength and experience.

 

With DNV-GL hull structural steel plate from GNEE STEEL, you can get reliable material support for your global marine projects and achieve win-win cooperation.

Get Your Customized Steel Plate Quote Now!

 

Are you looking for high-quality, DNV-GL-certified hull structural steel plates for your shipbuilding or offshore project? Do you need professional technical guidance to choose the right grade and specifications?

Contact GNEE STEEL now to get a free quote and detailed product sample!

 

📩 Send us an inquiry with your requirements (grade, thickness, width, length, quantity, and project scenario), and our professional team will reply to you within 2 hours, providing customized solutions and the most competitive price.

✅ DNV-GL-certified products

✅ professional technical support

✅ on-time delivery

 

- GNEE STEEL is your trusted partner for DNV-GL hull structural steel plates!

 

 

 

 

 

 

We guarantee the quality and quantity of DNV-GL Hull Structural Steel Platel. If you would like more information, please contact us!

 

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

 

 

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.

Request A Quote

 

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/ HADOX450/500	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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