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

Q: What are the delivery conditions for BV Grade A marine steel plates?

Delivery conditions are classified by plate thickness:Thickness ≤ 40 mm: Hot-rolled (AR) or controlled rolling (CR) are available;Thickness > 40 mm: Must be normalized (N) or thermomechanical controlled process (TMCP) to ensure uniform microstructure, meet toughness requirements, and eliminate internal stresses.Available specifications: Thickness 5 - 150 mm, width 1,500 - 4,000 mm, length 6,000 - 18,000 mm.

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

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BV Grade A shipbuilding steel plates are general-strength marine structural steels certified by Bureau Veritas (BV). They are the most widely used and cost-effective basic marine steel products. We supply BV Grade A shipbuilding steel plates in a full range of specifications, accompanied by complete official BV certification documents and factory test certificates (MTC), and can accommodate third-party inspections (such as SGS, BV, etc.). We offer cost-effective BV Grade A marine steel solutions.

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

BV Grade A shipbuilding steel plates are ordinary-strength marine structural steels certified by Bureau Veritas (BV) and are widely used in commercial shipbuilding, conventional offshore platforms, and general marine infrastructure projects.

This product offers stable structural strength, reliable room-temperature impact toughness, as well as good formability, weldability, and resistance to seawater corrosion. While meeting the construction requirements for conventional ships and offshore engineering projects, it also ensures cost-effectiveness in procurement, achieving a reasonable balance between structural performance and overall cost.

2. Meaning of the Designation

BV: Certified by Bureau Veritas (BV)

A: Impact toughness quality grade "A" (No impact test required.)

Available Specifications and Dimensions

Product Name	BV Grade A Shipbuilding Steel Plate
Certification	BV
Grade	A
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	Hot-Rolled (HR), Thermo-Mechanical Controlled Processed (TMCP), Normalized (N).
Surface Conditions	Original hot-rolled black scale, No cracks, scarring, delamination, inclusions, or deep scratches.
Machining Services	We offer custom machining services such as precision cutting, bending, drilling, rust removal, shot blasting, anti-corrosion coating, and heat treatment.
Additional Inspection	Ultrasonic testing (UT), Z-direction property test (Grades Z15/Z25/Z35), Third-party test (such as SGS, BV), etc. Supports dual or multiple certifications from major classification societies such as CCS, ABS, BV, DNV, and NK.
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 A	≤ 0.21	≤ 0.50	≥ 0.50	≤ 0.035	≤ 0.035	≤ 0.35	≤ 0.30	≤ 0.30	-

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 A	≥ 235	400 - 520	≥ 22

Impact Properties

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

Characteristics and Advantages

1. Stable Mechanical Properties

It can withstand long-term alternating loads and structural stresses in typical marine environments, ensuring the structural stability of ships and offshore facilities.

2. Excellent Weldability and Workability

It facilitates on-site cutting, bending, and welding operations, significantly improving construction efficiency.

3. Good Adaptability to Marine Environments

When used in conjunction with standard anti-corrosion coating systems, it effectively resists salt spray and atmospheric corrosion, extending the service life of structures.

4. Cost-Effective for Standard Projects

With balanced performance and competitive pricing, it fully meets the performance requirements for traditional commercial vessels and offshore auxiliary structures, effectively controlling project costs.

5. Authoritative BV Certification

Fully complies with Bureau Veritas (BV) marine steel standards, meeting global requirements for ship inspection, vessel registration, and offshore project acceptance.

Applications

1. Civilian Shipbuilding

Applicable to general cargo ships, fishing vessels, passenger ships, inland waterway vessels, coastal transport vessels, and small- to medium-sized bulk carriers; used for hull plating, decks, general bulkheads, and auxiliary structural members.

2. Marine Engineering in Normal-Temperature Waters

Used for general load-bearing components in coastal engineering facilities, conventional offshore support platforms, floating port facilities, and wharf support structures operating in normal-temperature waters.

3. Marine Equipment and Auxiliary Structures

Used for general-purpose marine equipment, ship accessories, marine container structural components, and standard marine engineering components.

4. Ports and Coastal Facilities

Used for structural components in conventional coastal wharves, port auxiliary facilities, fairway projects, and general marine infrastructure in temperate and subtropical regions.

FAQ

Q1:

What are the delivery conditions for BV Grade A marine steel plates?

Delivery conditions are classified by plate thickness:

Thickness ≤ 40 mm: Hot-rolled (AR) or controlled rolling (CR) are available;

Thickness > 40 mm: Must be normalized (N) or thermomechanical controlled process (TMCP) to ensure uniform microstructure, meet toughness requirements, and eliminate internal stresses.

Available specifications: Thickness 5 - 150 mm, width 1,500 - 4,000 mm, length 6,000 - 18,000 mm.

Q2:

Is BV Grade A shipbuilding steel plate easy to weld and process?

Yes. BV Grade A steel plate offers excellent weldability and workability, with moderate hardness and good ductility and plasticity. It is suitable for various conventional shipbuilding welding, cutting, and bending processes; it is easy to weld and resistant to cracking and deformation. No complex preheating treatment is required during construction, which effectively improves processing efficiency and reduces project costs.

Q3:

Is BV Grade A marine steel plate compatible with the standards of other classification societies?

Yes. The BV Grade A shipbuilding steel plates we supply offer broad international compatibility; their chemical composition and mechanical properties fully meet the requirements of the corresponding marine steel standards set by major classification societies such as BV, CCS, ABS, LR, DNV, and NK. Depending on project requirements, we can provide dual or multiple classification society joint certifications to comply with marine engineering acceptance codes in different countries or regions.

Q4:

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

BV Grade A is a standard-strength marine structural steel plate certified by Bureau Veritas. It is primarily used in the construction of civilian ship hulls, structural components for conventional offshore platforms, temperate coastal infrastructure, and the manufacture of general marine equipment. It is suitable for all marine engineering applications in ambient temperature conditions that require standard BV certification and stable structural performance.