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BV Grade E Shipbuilding Steel Plate - Ordinary-Strength Marine Structural Steel

Q: How should BV Grade E marine steel plates be stored?

1) Store indoors or in a rain-protected area;2) Avoid prolonged exposure to standing water;3) Stack in layers on raised supports;4) Keep the steel plate markings intact;5) Prevent surface damage during transportation;6) For export by sea, use moisture-proof packaging.

Q: What are the specifications and dimensions of the BV Grade E shipbuilding steel plates you supply?

We supply the following specifications and dimensions:Thickness: 5 - 150 mmWidth: 1,500 - 4,000 mmLength: 6,000 - 18,000 mmHeat Treatment: Thermo-Mechanical Control Process (TMCP), Normalizing (N), Quenching and Tempering (Q+T)Additional Inspection: Ultrasonic Testing (UT), Z-Direction Property Testing (Z15/Z25/Z35), Third-Party Inspection (SGS, BV, etc.)Machining Services: Precision cutting, bending, drilling, rust removal, shot blasting, and anti-corrosion coating.

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BV Grade E Shipbuilding Steel Plate - Ordinary-Strength Marine Structural Steel

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BV Grade E shipbuilding steel plates are BV-certified (Bureau Veritas) ordinary-strength, cryogenically resistant structural steel for shipbuilding, primarily used in ocean-going vessels, polar-class vessels, polar offshore engineering, high-latitude deep-sea projects, and the construction of ports and offshore facilities in extremely cold environments. We supply BV Grade E shipbuilding steel plates in a full range of specifications. Leveraging our ample spot inventory and stable, large-scale export capabilities, we provide customers with highly reliable and cost-effective cryogenic marine steel solutions.

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

BV Grade E shipbuilding steel plate is a standard-strength, cryogenic-grade structural steel for ship hulls certified by Bureau Veritas (BV), specifically designed for polar waters, extremely cold marine environments, and cryogenic operating conditions.

Its core properties include excellent resistance to brittle fracture at -40°C, stable mechanical properties, good weldability, and fatigue and corrosion resistance, ensuring reliable structural stability under the combined effects of cryogenic temperatures and alternating dynamic loads.

The product is widely used in ocean-going vessels, polar-class ships, high-latitude offshore engineering projects, cryogenic coastal port facilities, and other critical marine structural engineering projects with stringent low-temperature safety requirements.

2. Meaning of the Designation

BV: Certified by Bureau Veritas (BV)

E: Quality grade "E" (Must meet the requirements of the impact test at -40°C)

Available Specifications and Dimensions

Product Name	BV Grade E Shipbuilding Steel Plate
Certification	BV
Grade	E
Classification	Ordinary-Strength Structural Steel for Ship Hulls
Thickness	5 - 150 mm
Width	1,500 - 4,000 mm
Length	6,000 - 18,000 mm
Delivery Conditions	Thermo-Mechanical Controlled 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	Als
BV E	≤ 0.18	≤ 0.35	≥ 0.70	≤ 0.025	≤ 0.025	≤ 0.35	≤ 0.30	≤ 0.30	≥ 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 E	≥ 235	400 - 520	≥ 22

Impact Properties

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
BV E	≤ 50	- 40	≥ 27	≥ 20
	> 50 - 70	- 40	≥ 34	≥ 24
	> 70 - 150	- 40	≥ 41	≥ 27

Characteristics and Advantages

1. -40°C Ultra-Low-Temperature Impact Toughness (Designed for Polar and Heavy-Ice Regions)

Features BV-certified -40°C ultra-low-temperature impact toughness, specifically designed for marine environments in polar and heavy-ice regions.

2. Stable Comprehensive Mechanical Properties and Structural Durability in Polar Environments

Features a reliable balance of strength, ductility, and toughness, ensuring long-term safe service of structures in polar low-temperature environments.

3. Excellent Low-Temperature Weldability and Adaptability to Extreme Cold Construction Conditions

Maintains good weldability in extremely cold environments, adapts to low-temperature on-site construction conditions, and reduces the risk of cold cracking.

4. Enhanced Resistance to Polar Corrosion and Ice Fatigue

Effectively resists corrosion damage in polar frozen environments and fatigue failure caused by ice loads.

5. Strategy for Balancing Extreme Low-Temperature Performance and Cost in Polar Projects

Balances extreme low-temperature performance requirements with economic considerations, providing a cost-effective material option for polar marine engineering.

Applications

1. Polar Icebreakers and Ice-Class Cargo Ships

Used for the main hull structure and ice-class reinforcement sections.

2. Polar Workboats and Extreme Cold Support Vessels

Used for the load-bearing structures of vessels engaged in polar maritime operations and logistical support.

3. Main Load-Bearing and Auxiliary Structures of Polar Offshore Platforms

Used for the core load-bearing components, reinforcement components, and auxiliary facilities of polar offshore platforms.

4. High-Latitude Polar Ports and Coastal Infrastructure

Used in polar ports, docks, and coastal engineering facilities.

5. Key Load-Bearing and Auxiliary Structures for Polar Marine Equipment

Used for the core load-bearing components and auxiliary support structures of marine machinery and equipment in polar environments.

FAQ

Q1:

What is the main difference between BV Grade D and BV Grade E marine steel?

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

BV Grade D: Possesses impact toughness at ultra-low temperatures of -20°C and is suitable for conventional projects in cold, high-latitude waters;

BV Grade E: Offers ultra-low-temperature impact toughness at -40°C, maintaining structural integrity in extremely cold polar environments where Grade D is insufficient, effectively preventing brittle fracture.

BV Grade E provides a higher safety margin and greater structural stability in extreme environments, making it the highest-grade conventional low-temperature-resistant marine steel in the BV series designed for extreme polar engineering applications.

Q2:

What are the common delivery conditions for BV Grade E steel plates?

Common delivery conditions include normalized (N), thermomechanically controlled process (TMCP), and quenched and tempered (QT).

Among these, the normalized condition is the most commonly used, as it refines the grain structure and effectively ensures low-temperature impact toughness.

Q3:

What are the applications of BV E shipbuilding steel plates?

BV Grade E shipbuilding steel plate is a BV-certified, standard-strength cryogenic marine structural steel with impact toughness at -40°C.

It is primarily used in the construction of polar and deep-sea vessels, high-latitude offshore platforms, ports and coastal facilities in ice-covered regions, as well as in the maintenance, repair, and retrofitting of cryogenic marine structures. It serves as a critical structural material in polar and cryogenic marine engineering projects worldwide.

Q4: