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ABS Grade B Shipbuilding Steel Plate - Certified Marine Steel Supplier in China

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Looking for high-standard ABS Grade B Shipbuilding Steel Plate? Our ABS Grade B marine steel plate is certified by the American Bureau of Shipping (ABS), meeting strict international marine industry standards for strength, toughness and weldability. As a professional ABS Grade B shipbuilding steel plate supplier, we provide high-quality ABS Grade B steel plates with competitive prices and timely delivery, which are widely used in ship hull construction, marine equipment and offshore structures. Choose our ABS Grade B shipbuilding steel plate for reliable performance and professional service.

Certification :
ABS Rules
Grade :
ABS Grade B
Thickness :
5.0 - 150.0 mm
Width :
1500.0 - 4000.0 mm
Length :
6000.0 - 18000.0 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 ABS Grade B Shipbuilding Steel Plate?

ABS Grade B Shipbuilding Steel Plate, also known as ABS Gr. B marine steel plate or ABS B ship steel sheet, is a kind of ordinary-strength structural steel standardized by the American Bureau of Shipping (ABS) for shipbuilding applications. It is made of hot-rolled or normalized high-strength structural steel, with excellent chemical composition, mechanical properties and impact toughness, which is the core material for building safe and durable marine structures. Different from ABS Grade A steel plate, ABS Grade B is tested for impact toughness at 0°C, making it more suitable for high-stress marine environments that require reliable ABS Grade B shipbuilding steel plate performance.

2. Key Features of ABS Grade B Shipbuilding Steel Plate

2.1 Authoritative ABS Certification

Our ABS Grade B Shipbuilding Steel Plate is fully compliant with ABS (American Bureau of Shipping) standards and ASTM A131 specifications, with complete certification documents to ensure compliance with international marine industry regulations, providing a reliable "international pass" for marine projects that use ABS Grade B ship steel.

2.2 Excellent Mechanical Properties

The ABS Grade B Shipbuilding Steel Plate has a minimum yield strength of 235 MPa (34 ksi), tensile strength ranging from 400 to 520 MPa (58-75 ksi), elongation of not less than 22%, and minimum impact energy of 27J at 0°C (adjusted according to thickness), ensuring strong load-bearing capacity and impact resistance in harsh marine conditions for ABS Grade B marine steel plate applications.

2.3 Superior Weldability & Formability

With a maximum carbon content of 0.21%, our ABS Grade B Shipbuilding Steel Plate has good weldability, reducing the risk of weld cracking during fabrication; it also has excellent formability, which can be flexibly processed into various structural parts to adapt to the curved surface forming needs of ship hulls using ABS Grade B steel plate.

2.4 Marine Corrosion Resistance

Through scientific smelting process and optional shot blasting treatment, the surface of our ABS Grade B Shipbuilding Steel Plate is clean and smooth, with strong resistance to marine salt spray corrosion, extending the service life of marine structures using ABS Grade B marine steel plate in harsh marine environments.

2.5 Flexible Specifications & Customization

We provide a full range of ABS Grade B Shipbuilding Steel Plate specifications to meet diverse project needs, with thickness ranging from 4mm to 260mm, width from 1200mm to 4000mm, and length from 3000mm to 18000mm; we also support customized ABS Grade B steel plate specifications and processing services according to customer requirements.

Available Specifications and Dimensions

Table 1: Specifications of ABS Grade B Shipbuilding Steel Plates for Sale

Grade	ABS Grade B
Certification	ABS (American Bureau of Shipping): Rules for Building and Classing Steel Vessels
Material Category	Ordinary-strength structural steel for shipbuilding
Primary Applications	Ship hull construction, Marine equipment, Offshore structures.
Dimensions	Thickness: 5 - 150 mm, width: 1500 - 4000 mm, length: 6000 - 18000 mm.
Delivery Conditions	Hot Rolled, Controlled Rolled, Normalized, Thermo-Mechanical Controlled Processed (TMCP).
Surface Conditions	Typically black skin, shot blasting, pickling, oiling and painting are available.
Additional Services	Charpy V-notch impact test, Z-direction property test (Grades Z15/Z25/Z35), Ultrasonic testing (UT), Custom cutting.
Packaging	Standard export packaging for sea transport (primarily steel strapping and moisture-proof cloth wrapping).
Country of origin	China

Chemical Composition

Table 2: Chemical Composition of ABS Grade B Shipbuilding Steel Plates (heat analysis, wt %)

Grade	C	Si	Mn	P	S	Cu	Cr	Ni
ABS Grade B	≤ 0.21	≤ 0.35	≥ 0.80	≤ 0.035	≤ 0.035	≤ 0.35	≤ 0.30	≤ 0.30

Table 2-1 Carbon Equivalent (wt %)

Thickness (mm)	5 - 50	50 - 150
Typical CEV (wt %)	≤ 0.36	≤ 0.40

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

Mechanical Properties

Table 3: Mechanical Properties - Tensile test properties

Grade	Thickness, mm	Yield Strength (ReH), MPa	Tensile Strength (Rm), MPa	Elongation (A), %
ABS Grade B	≤ 50	≥ 235	400 - 520	22

Table 4: Mechanical Properties - Impact energy KV2 (Charpy V-notch Impact Test)

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
ABS Grade B	≤ 50	0	27	20

Applications

ABS Grade B Shipbuilding Steel Plate is almost exclusively used in the shipbuilding industry and marine engineering, mainly for the construction of structural parts that require high strength and impact resistance:

1. Ship hull construction

Main hull plating, decks, keels, bulkheads and other high-stress structural parts of ocean-going ships, container ships, bulk carriers, tankers and cruise ships, all of which rely on high-quality ABS Grade B shipbuilding steel plate.

2. Marine equipment

Barges, marine auxiliary equipment, ship repairing components that require the reliability of ABS Grade B marine steel plate.

3. Offshore structures

Offshore oil drilling platforms, platform pipe joints, offshore wind power brackets, seaport terminals and other offshore engineering components using ABS Grade B shipbuilding steel plate.

Other Information

Why choose our ABS Grade B shipbuilding steel plates?

1. Rigorous quality control system

We have established a comprehensive and stringent quality control system for our ABS Grade B shipbuilding steel plates. All supplied ABS Grade B shipbuilding steel plates are certified by ABS (American Bureau of Shipping) and undergo third-party authoritative testing, with complete test reports and certification documents provided with each shipment.

2. Highly Competitive Value for Money

As a seasoned domestic supplier of ABS Grade B shipbuilding steel plates, we offer our clients market-competitive pricing whilst ensuring high product quality. Furthermore, with our extensive experience in the industry, we possess a proven track record of order fulfilment and can precisely align with our clients’ delivery schedule requirements.

3. Comprehensive logistics and transport support

We have established a comprehensive logistics and transport network covering major ports worldwide. By collaborating with specialist logistics partners and implementing scientifically planned transport solutions, we ensure that ABS Grade B shipbuilding steel plates are delivered safely and on time to the customer’s designated local port. This fundamentally prevents delays in shipbuilding projects caused by material supply issues, thereby ensuring the smooth progress of projects.

4. Professional and Efficient After-Sales Service

We have assembled an after-sales team with extensive experience in the application of ABS Grade B shipbuilding steel plates. We provide 24-hour technical consultation and after-sales support, promptly resolving any issues encountered by clients during practical application and comprehensively safeguarding their interests.

FAQ

Q1:

Do you provide ABS certification documents for your ABS shipbuilding plates?

Yes, all our ABS shipbuilding plates are certified by the American Bureau of Shipping (ABS). We will provide full certification documents and a Material Test Certificate (MTC) to ensure that our ABS steel plate products comply with international maritime industry regulations and meet the acceptance requirements for our customers’ projects.

Q2:

Can ABS Grade B shipbuilding steel plates be customised?

Yes, we can customise the thickness, width, length and delivery terms of ABS Grade B shipbuilding steel plates to meet customer requirements. We can also provide additional processing services, such as shot blasting, cutting and welding.

Q3:

Are ABS Grade B shipbuilding plates suitable for low-temperature environments?

No. ABS Grade B only requires impact testing at 0°C. For lower temperatures (–20°C or below), consider ABS Grade D or E.

Q4:

Can ABS Grade B marine steel plates be welded without preheating?

Yes, ABS Grade B marine steel offers excellent weldability. However, preheating may be required for thicknesses exceeding 50 mm or in low ambient temperatures. Please consult our technical team regarding the Welding Procedure Specification (WPS).

Q5:

Can ABS shipbuilding steel plates be supplied in normalized conditions?

Yes. Depending on the thickness (typically 40 mm or more), we can supply ABS shipbuilding steel plates in either normalized (N) or thermomechanically controlled process (TMCP) conditions to improve the grain structure.

Q6:

What is the difference between ABS Grade A, B, D and E?

The yield strength (≥235 MPa) and tensile strength of ABS Grades A, B, D and E are identical (400–520 MPa).

The key difference lies in their impact temperature:

Grade A at 20°C (room temperature), Grade B at 0°C, Grade D at –20°C and Grade E at –40°C.

Q7:

What is the minimum order quantity (MOQ) for ABS steel plates?

We accept small-volume orders, with a minimum order quantity of 20 tons.

Q8:

Do you offer shot blasting and primer coating?

Yes, we offer shot blasting to SA2.5 standard and high-quality shop primer coating.

Q9:

What is the difference between ABS Grade A and Grade B?

Both grades are ordinary-strength marine steels with identical yield and tensile strengths, but ABS Grade B undergoes impact testing at 0°C, whereas Grade A typically does not require a specific impact test temperature, making Grade B more suitable for colder environments or high-stress zones.