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BV Grade EH36 Shipbuilding Steel Plate - High-Strength Marine Structural Steel

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BV Grade EH36 is a high-strength, low-alloy cryogenic marine structural steel plate certified by Bureau Veritas (BV), used in heavy-duty polar ship hull structures, large offshore platforms in ice-prone areas, and marine engineering projects in extremely cold environments with high load-bearing requirements. We supply BV-certified EH36 steel plates in a full range of specifications, available in TMCP (Thermomechanical Control Process), normalized (N), and quenched and tempered (Q+T) conditions. Every batch undergoes 100% quality inspection throughout the entire production process, comes with a Mill Test Certificate (MTC), and supports inspection by internationally recognized third-party organizations.

Certification :
BV Rules
Grade :
BV Grade EH36 (BV EH36)
Thickness :
5.0 - 150.0 mm
Width :
1,500.0 - 4,000.0 mm
Length :
6,000.0 - 18,000.0 mm

Special thickness, width, and length can be negotiated separately.
We also provide customized processing services.If you have any questions, please contact us.

Overview

1. What is BV Grade EH36 shipbuilding steel plate?

BV Grade EH36 shipbuilding steel plate is a high-strength, low-alloy, cryogenic marine structural steel plate certified by Bureau Veritas (BV), specifically developed and designed for heavy-duty polar hull structures, large offshore platforms in ice-prone areas, and marine engineering projects operating in extremely cold environments under high-load conditions.

This steel plate offers the following core properties:

1) High structural strength: Yield strength ≥ 355 MPa

2) Cryogenic impact toughness: -40°C

3) Excellent fatigue resistance

4) Excellent weldability

5) Excellent machinability

6) Excellent resistance to seawater corrosion

Under conditions of extreme low-temperature corrosion, severe ice impact, and long-term high-load operation, BV EH36 steel plates maintain exceptionally stable mechanical properties, effectively mitigating the risks of structural deformation, brittle fracture, and fatigue failure. The product is widely used in polar icebreakers, heavy-duty polar container ships, large offshore platforms in high latitudes, and deep-sea, ultra-low-temperature, heavy-load marine engineering projects, making it the ideal choice for structural steel under these demanding operating conditions.

2. Meaning of the Designation

BV: Certified by Bureau Veritas (BV)

E: Quality grade "E" (Impact toughness grade "E", mandatory impact test at -40°C)

H: High strength steel

36: Yield strength ≥ 355 MPa (≈ 36 kgf/mm²)

Available Specifications and Dimensions

Product Name	BV Grade EH36 Shipbuilding Steel Plate
Certification	BV
Grade	EH36
Classification	High-Strength Steel Plates for Ship Hull Structures
Thickness	5 - 150 mm
Width	1,500 - 4,000 mm
Length	6,000 - 18,000 mm
Delivery Conditions	Thermo-Mechanical Controll Process (TMCP), Normalized (N), Quenched and Tempered (Q+T).
Surface Conditions	Original hot-rolled black scale. No cracks, scarring, delamination, inclusions, or deep scratches.
Machining Services	Precision cutting, bending, drilling, rust removal, shot blasting, anti-corrosion coating, and heat treatment.
Additional Inspection	Ultrasonic Testing (UT), Z-direction performance testing (Z15/Z25/Z35 grades), third-party inspections (e.g., SGS, BV), and multiple classification society certifications (ABS, CCS, DNV, LR, NK, etc.)
MOQ	20 tons (small orders can be negotiated).
Delivery Time	15 - 20 days after order confirmation (urgent orders accepted).
Packaging	Standard export packaging for sea transport, or as required.
Country of origin	China

Chemical Composition

( Heat Analysis )

Elements	C	Si	Mn	P	S	Cu	Cr	Ni	Nb	V	Ti	Mo	Als
Content ( wt % )	≤ 0.18	≤ 0.50	0.90 - 1.60	≤ 0.025	≤ 0.025	≤ 0.35	≤ 0.20	≤ 0.40	0.02 - 0.05	0.05 - 0.10	≤ 0.02	≤ 0.08	≥ 0.015

Carbon Equivalent

Thickness (mm)	5 - 50	50 - 150
Typical CEV (wt %)	≤ 0.38	≤ 0.40

* Calculation formula (IIW): CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15

Mechanical Properties

Grade	Yield Strength (ReH), MPa	Tensile Strength (Rm), MPa	Elongation (A), %
BV EH36	≥ 355	490 - 630	≥ 21

Impact Properties

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
BV EH36	≤ 50	- 40	≥ 34	≥ 24
	> 50 - 70	- 40	≥ 41	≥ 27
	> 70 - 150	- 40	≥ 50	≥ 34

Characteristics and Advantages

1. High-Strength Load-Bearing Capacity

Supports the design of lightweight, high-strength, large-scale ship hull structures that effectively withstand impacts from polar sea ice collisions, heavy cargo loads, and long-term extreme alternating marine loads, making it ideally suited for the high-load operating conditions of large polar cargo ships, heavy-duty icebreakers, and ultra-large offshore platforms.

2. Impact Toughness at -40°C

Stable toughness at extreme low temperatures effectively mitigates the risk of brittle fracture in steel in polar and ice-covered regions. It maintains structural integrity under prolonged exposure to sub-zero freezing conditions and severe ice-wave erosion, significantly enhancing the operational safety and service life of heavy-duty marine structures in extremely cold environments.

3. Excellent Fatigue Resistance

It delays structural fatigue failure under long-term extreme low-temperature cyclic loads and intense ice impact, meeting the requirements for long service life and high reliability of core components in heavy-duty polar ship hulls and critical ultra-large offshore structures in cold regions.

4. Excellent Weldability

It exhibits low susceptibility to welding cracks under low-temperature conditions and supports efficient all-position welding processes, requiring no complex low-temperature preheating or only simple preheating treatment.

5. Excellent Workability

It exhibits excellent ductility and plasticity at low temperatures, facilitating on-site processing operations such as cutting and bending. This significantly improves the efficiency of heavy-duty polar offshore engineering construction and reduces construction and maintenance costs.

6. Excellent Resistance to Seawater Corrosion

It effectively resists seawater erosion, high-salt-fog corrosion, and aging caused by polar freeze-thaw cycles, thereby extending the service life of core components in heavy-duty polar ship hulls and critical offshore structures in cold regions.

Applications

1. Heavy-duty polar and deep-sea vessels

Suitable for core load-bearing and brittle-resistance structural components of polar icebreakers, large polar research vessels, ultra-large polar cargo ships, heavy-duty polar container ships, high-latitude luxury cruise ships, and heavy-duty fishing vessels in northern cold regions, including main load-bearing hull plates, thick outer plates, cold-resistant heavy-duty decks, reinforced bulkheads, and high-stress reinforcement structures.

2. Polar Deep-Sea Platforms and Arctic Heavy-Duty Facilities

Suitable for critical cold-resistant load-bearing structures in polar deep-sea platforms, ultra-large polar drilling platforms, heavy-duty FPSO facilities in cold regions, heavy-duty cold-region jetties, deep-sea wind power foundation structures, and ultra-large auxiliary offshore engineering projects. These include platform heavy-duty decks, large drilling equipment supports, large support trusses, and heavy-duty components resistant to freezing and corrosion.

3. Polar Ports and Marine Infrastructure

Suitable for large-scale, heavy-load ports along the Arctic coast and marine infrastructure in extremely cold environments, including primary load-bearing structures for polar deep-water terminals, heavy-duty fenders, large-scale vessel mooring facilities, and heavy-duty support structures for coastal engineering projects in cold regions.

4. Heavy-Duty Polar Marine Machinery and Cryogenic Auxiliary Equipment

Suitable for critical load-bearing components of heavy-duty polar marine machinery and auxiliary equipment, including ship-mounted heavy-duty crane bases, large winch supports, main load-bearing structures in engine rooms, and heavy-duty fixed frames for offshore construction equipment designed to withstand extreme cold and prevent freezing.

FAQ

Q1:

Does BV EH36 shipbuilding steel plate require Z-direction performance testing?

Z-direction performance refers to the steel plate’s resistance to laminar tearing in the thickness direction. When BV EH36 steel plates are used in critical areas subject to high welding stresses or tensile forces in the thickness direction (such as offshore platform joints and T-welds), additional laminar tearing resistance tests at the Z15, Z25, or Z35 levels are typically required.

Q2:

What dimensions are available for your BV EH36 marine steel plates?

We supply BV EH36 marine steel plates in the following dimensions:

Items	Range
Thickness	5.0 - 150.0 mm
Width	1,500.0 - 4,000.0 mm
Length	6,000.0 - 18,000.0 mm

Q3:

What is the application of BV EH36 shipbuilding steel plates?

BV EH36 shipbuilding steel plates are high-strength structural steel plates for marine applications with a yield strength of 355 MPa and impact toughness at ultra-low temperatures of -40°C. The product is primarily used in heavy-duty icebreakers, large polar ocean-going merchant ships, ultra-large offshore platforms in ice-covered regions, heavy-duty marine energy facilities in extremely cold environments, and various cryogenic, heavy-load marine engineering projects with stringent requirements for strength and low-temperature toughness. It serves as a critical material for core freeze-resistant load-bearing structures in the harsh environments of polar ice zones.

Q4:

What is the main difference between BV DH36 and BV EH36 marine steels?

The key differences between the two lie in their low-temperature impact toughness grades and application scenarios:

BV DH36: Requires impact toughness at -20°C and is suitable for conventional cold-water regions and seasonal low-temperature operating conditions;

BV EH36: Requires impact toughness at -40°C and is suitable for polar and extreme sub-zero marine environments.

Selection Recommendations:

1) For projects in conventional cold waters, BV DH36 offers better value for money and avoids the performance redundancy and additional costs associated with BV EH36.

2) Projects in polar and extremely low-temperature marine environments must use BV EH36 to prevent structural brittle fracture under harsh, extremely low-temperature marine conditions.