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BV Grade EH32 Shipbuilding Steel Plate - High-Strength Marine Structural Steel

Q: What is the size range for BV EH32 marine steel plates?

The standard size ranges are as follows:Thickness: 5 - 120 mmWidth: 1,500 - 4,000 mmLength: 6,000 - 18,000 mmIn addition, custom cut sizes are available upon customer request, and we support UT (ultrasonic testing), Z-direction property testing, and third-party inspection.

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BV Grade EH32 Shipbuilding Steel Plate - High-Strength Marine Structural Steel

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BV Grade EH32 - A Bureau Veritas-certified high-strength marine steel plate for polar applications, specifically designed for navigation in ice-covered waters and low-temperature offshore engineering. The product comes with the original BV certification and complete factory test data, ensuring end-to-end quality traceability and effectively reducing material risks for projects. Supporting services include third-party inspection, customized value-added processing, and delivery to ports worldwide, providing comprehensive support for polar projects - from material selection to on-site installation.

Certification :
BV Rules
Grade :
BV Grade EH32 (BV EH32)
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 EH32 shipbuilding steel plate?

BV Grade EH32 shipbuilding steel plate is a high-strength hull structural steel certified by Bureau Veritas (BV) for polar applications. It is specifically designed for vessels navigating in ice-covered waters and offshore engineering platforms in extremely cold seas, meets the low-temperature impact toughness requirements at -40°C, and is suitable for demanding projects such as the Northern Sea Route, icebreakers, and polar drilling platforms.

Key performance characteristics include: ultra-low-temperature impact toughness (-40°C), stable structural strength (yield strength ≥315 MPa, tensile strength 450–570 MPa), excellent resistance to brittle fracture, excellent fatigue resistance, good weldability, and long-term resistance to seawater corrosion.

This product effectively addresses the risks of brittle fracture and fatigue failure associated with conventional marine steels in extremely cold marine environments and is widely used in polar-class vessels, offshore engineering projects in ice-covered waters, and marine construction projects in extremely cold regions.

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

32: Yield strength ≥ 315 MPa (≈ 32 kgf/mm²)

Available Specifications and Dimensions

Product Name	BV Grade EH32 Shipbuilding Steel Plate
Certification	BV
Grade	EH32
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, wt %)

Grade	C	Si	Mn	P	S	Cu	Cr	Ni	Nb	V	Ti	Mo	Als
BV EH32	≤ 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 %)	≤ 0.36	≤ 0.38

* 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 EH32	≥ 315	450 - 570	≥ 22

Impact Properties

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
BV EH32	≤ 50	- 40	≥ 31	≥ 22
	> 50 - 70	- 40	≥ 38	≥ 26
	> 70 - 150	- 40	≥ 46	≥ 31

Characteristics and Advantages

1. High Load-Bearing Capacity

With a yield strength of ≥315 MPa and a tensile strength of 450–570 MPa, this material offers reliable structural rigidity and stable heavy-load-bearing capacity, enabling it to withstand complex alternating stresses from ocean winds and waves as well as heavy structural loads over the long term.

2. Impact Toughness at -40°C

It has passed the mandatory -40°C Charpy V-notch impact test, effectively preventing brittle fracture, structural cracking, and fatigue failure in polar waters and ultra-low-temperature environments.

3. Excellent Weldability and Processability

With low susceptibility to cold cracking during welding and excellent ductility and plasticity, the material supports processes such as precision cutting, hot and cold bending, roll forming, and high-efficiency all-position welding in low-temperature environments.

4. Enhanced Seawater Corrosion Resistance and Fatigue Performance

It effectively delays corrosion-induced aging and fatigue damage, significantly extending the safe service life of marine structures in extremely cold and harsh maritime environments.

Applications

1. Polar and Deep-Sea Vessels

Core load-bearing structures for polar cargo ships, icebreaking support vessels, and ultra-long-distance cold-region transport vessels, including main hull load-bearing plates, thickened decks, side plating, watertight bulkheads, and critical high-stress components.

2. Cryogenic Marine Engineering

Used for core components of polar offshore drilling platforms, deep-sea operation platforms, offshore wind power foundation structures, and floating production, storage, and offloading (FPSO) units in ice-covered waters, covering equipment bases, heavy-duty support trusses, pressure-bearing decks, and fixed components.

3. Large-Scale Ports and Marine Infrastructure in Cold Regions

Suitable for primary load-bearing structures of polar deep-water terminals, large-scale port auxiliary facilities, heavy-duty fenders, large-scale vessel mooring facilities, cryogenic marine infrastructure, and support structures for coastal engineering projects in ice-covered areas.

4. Polar Marine Machinery and Auxiliary Equipment Structures

Used for medium-load-bearing structural components of polar marine auxiliary equipment, including ship crane bases, large winch supports, main load-bearing structures for engine rooms, and freeze-proof mounting frames for offshore construction equipment.

FAQ

Q1:

What is the size range for BV EH32 marine steel plates?

The standard size ranges are as follows:

Thickness: 5 - 120 mm

Width: 1,500 - 4,000 mm

Length: 6,000 - 18,000 mm

In addition, custom cut sizes are available upon customer request, and we support UT (ultrasonic testing), Z-direction property testing, and third-party inspection.

Q2:

What processing services do you offer for BV Grade EH32 marine steel plates?

We provide one-stop value-added processing services, including precision cutting, bending, drilling, beveling, surface rust removal, shot blasting, anti-corrosion coating, and specialized heat treatment. These services fully meet the various custom processing needs of polar shipbuilding and offshore engineering projects in extremely cold regions.

Q3:

What are the main differences between BV DH32 and BV EH32 marine steels?

The key differences between the two lie in their low-temperature toughness ratings and applicable scenarios:

BV DH32: Features impact toughness at -20°C and is suitable for conventional cold waters and marine engineering projects in areas with seasonal low temperatures;

BV EH32: Offers impact toughness at -40°C, with superior resistance to brittle fracture and freeze-thaw cycles, and is specifically designed for more demanding environments such as polar regions, ice-covered waters, and extremely cold offshore engineering projects.

Q4:

What are the applications of BV Grade EH32 shipbuilding steel plates?

BV Grade EH32 shipbuilding steel plates are BV-certified cryogenic structural steel plates for polar vessels. They are primarily used in critical, brittle-resistant, cold-resistant structures for polar and subpolar ocean-going vessels; high-strength load-bearing components for platforms in high-latitude, extremely cold waters; cryogenic marine infrastructure; and the manufacture of specialized cold-resistant marine equipment. They serve as the core freeze-resistant structural material for vessels operating in polar and ice-covered regions, as well as for marine engineering projects.

Q5:

What are the delivery conditions for BV EH32 marine steel plates?

Delivery conditions are classified by plate thickness range as follows:

Thickness Range	Delivery Condition	Description
≤ 50 mm	Thermomechanically Controlled Process (TMCP) or Normalized (N)	Typically supplied in the TMCP condition, which offers lower cost and good weldability.
> 50 mm – 100 mm	Normalized (N)	Normalizing refines the grain structure and ensures that the core of the steel plate meets the specified low-temperature impact toughness requirements.
> 100 mm	Quenched + Tempered (Q+T)	For extra-thick steel plates, the Q+T heat treatment process is used to ensure mechanical properties throughout the entire cross-section.