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CCS Grade D Shipbuilding Steel Plate - CCS Certified Marine Steel Plate

Q: What is the difference between CCS Grade D and CCS Grade E shipbuilding steel plates?

Key difference: Different low-temperature impact toughness.CCS Grade D steel: Impact test temperature is -20°C.CCS Grade E steel: Impact test temperature is -40°C.

Q: What is the main difference between CCS Grade A steel and CCS Grade D steel?

The main difference between the two lies in the temperature requirements for impact testing.CCS Grade A: No impact testing is required for standard thicknesses (≤50 mm); impact testing in accordance with the specifications is only required when the thickness exceeds 50 mm.CCS Grade D: A Charpy V-notch impact test must be conducted at 0°C to ensure safe use in colder marine environments.

CCS Grade D Shipbuilding Steel Plate - CCS Certified Marine Steel Plate

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CCS Grade D shipbuilding steel plates are normal-strength hull structural steel plates certified by the China Classification Society (CCS), widely used in hull construction, offshore engineering and marine structural components. These steel plates comply with the GB/T 712-2022 standard for marine steel and offer excellent low-temperature toughness, stable mechanical properties and good weldability. The product has passed the rigorous inspections of the China Classification Society and is available for bulk supply and custom processing to customers in the global marine industry.

Certification :
CCS Rules
Standard :
GB/T 712
Grade :
CCS Grade D (CCS D)
Thickness :
5.0 - 150.0 mm
Width :
1500.0 - 3950.0 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 CCS Grade D shipbuilding steel plate?

CCS Grade D shipbuilding steel plate is a normal-strength hull structural steel certified by the China Classification Society (CCS), complying with the Chinese national standard GB/T 712-2022 ‘Structural Steel for Ship and Ocean Engineering’. This steel plate offers excellent low-temperature toughness (as demonstrated by impact testing at -20°C), stable mechanical properties (yield strength ≥ 235 MPa) and good weldability, and is widely used in ship hull structures, offshore platforms and marine engineering projects.

We supply high-quality CCS Grade D shipbuilding steel plates, fully certified by CCS, with customisable dimensions and global shipping available, and are committed to serving shipyards and marine engineering companies worldwide.

2. Meaning of the designation

CCS: Certified by the China Classification Society

D: Quality Grade D (Impact toughness grade: Impact test at -20°C)

3. Key Advantages

Among standard marine structural steels, CCS Grade D shipbuilding steel plates offer unrivalled advantages for use in low- to medium-temperature marine environments:

3.1 Excellent low-temperature toughness

Maintains stable impact resistance at -20°C, effectively preventing brittle fracture of steel plates in cold waters.

3.2 Reliable CCS certification

Approved by the China Classification Society, compliant with shipbuilding industry regulations and meeting global shipbuilding inspection standards.

3.3 Excellent welding and forming properties

Designed with a low carbon equivalent, facilitating welding, bending and cutting operations to meet the manufacturing requirements of complex hull structures.

3.4 High corrosion resistance

Optimised alloy composition enhances resistance to seawater corrosion, extending service life at sea.

3.5 Strict Quality Control

Every batch undergoes ultrasonic testing, chemical analysis and mechanical property testing to ensure consistent and reliable quality.

3.6 Customisation Flexibility

A variety of rolling processes, including rolling, controlled rolling, TMCP and normalising, are available to meet diverse engineering requirements.

Available Specifications and Dimensions

Product	CCS Grade D Shipbuilding Steel Plate
Certification	CCS
Grade	D
Material Category	Normal-Strength Structural Steel for Ship and Ocean Engineering
Thickness	5 - 150 mm
Width	1500 - 3950 mm
Length	6000 - 18000 mm
Delivery Conditions	Hot Rolled (HR), Controlled Rolled (CR), Normalized (N), Thermo-Mechanical Controlled Processed (TMCP).
Surface Conditions	Surface pretreatment (shot blasting, rust removal, oiling, painting, etc.) is available.
Testing	Tensile test, Charpy V-notch impact test, Ultrasonic testing (UT), Z-direction property test (Grades Z15/Z25/Z35), Dimensional inspection, Custom cutting.
Applications	Widely used in the hull structures of standard vessels, offshore platform support structures, offshore pipeline supports, marine support equipment, etc.
MOQ	50 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

Chemical Composition (Heat Analysis, wt %)

Grade	C	Si	Mn	P	S	Cu	Cr	Ni	Als
CCS D	≤ 0.21	≤ 0.35	≥ 0.60	≤ 0.030	≤ 0.030	≤ 0.35	≤ 0.30	≤ 0.30	≥ 0.015

Carbon Equivalent (wt %)

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

Tensile test

Grade	Yield Strength (ReH), MPa	Tensile Strength (Rm), MPa	Elongation (A), %
CSS D	≥ 235	400 - 520	≥ 22

Charpy (V-notch) impact test

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

Applications

CCS Grade D shipbuilding steel plates offer low cost and good environmental adaptability. They are widely used for the hulls, decks, bulkheads and superstructures of general-purpose vessels such as bulk carriers, cargo ships and tugs, and are also suitable for the manufacture of marine structural components such as offshore platforms, offshore pipeline supports and port machinery and equipment.

1. Hull Structures

Hulls, decks, bulkheads and superstructures.

2. Merchant Ship Construction

Bulk carriers, oil tankers, container ships, fishing vessels.

3. Offshore Facilities

Offshore platform support structures, offshore pipeline support systems.

4. Port Engineering

Steel structures for quays, marine engineering support equipment.

5. Other Marine Steel Structures

Marine storage tanks, auxiliary ship fittings.

Other Information

Why choose our CCS Grade D shipbuilding steel plates?

1. Authentic and Reliable Certification

Fully certified by CCS (China Classification Society), with full traceability of production data.

2. Excellent Value for Money

We offer competitive ex-works prices to help customers effectively control procurement costs.

3. Ample Stock and Flexible Supply

We maintain a stock of standard sizes and support both small-batch trial orders and large-scale wholesale purchases.

4. Customisation Services

We offer customised dimensions, processing and packaging services to meet specific customer requirements.

5. Professional Team Support

24/7 online technical support, providing expert advice on material selection and shipping solutions.

6. Global Shipping

Extensive export experience covering major global shipping routes.

FAQ

# 1Q:What is the difference between CCS Grade D and CCS Grade E shipbuilding steel plates?

Key difference: Different low-temperature impact toughness.

CCS Grade D steel: Impact test temperature is -20°C.

CCS Grade E steel: Impact test temperature is -40°C.

# 2Q:In which parts of a ship is CCS Grade D steel plate primarily used?

CCS Grade D General-strength structures for primarily cold-water / high-latitude routes:

Hull shell, deck, sides, bulkheads.

Keel, inner bottom plates, frames, stringers.

Non-critical high-strength sections of bulk carriers, container ships, oil tankers and offshore platforms.

# 3Q:What is the main difference between CCS Grade A steel and CCS Grade D steel?

The main difference between the two lies in the temperature requirements for impact testing.

CCS Grade A: No impact testing is required for standard thicknesses (≤50 mm); impact testing in accordance with the specifications is only required when the thickness exceeds 50 mm.

CCS Grade D: A Charpy V-notch impact test must be conducted at 0°C to ensure safe use in colder marine environments.

# 4Q:What delivery conditions are available for CCS Grade D shipbuilding steel plates?

Depending on the plate thickness and your structural requirements, we can supply CCS Grade D plates in the following conditions: as-rolled (AR), controlled rolling (CR), normalised (N) or thermomechanically control process (TMCP).

# 5Q:Can you provide a CCS 3.2 certificate for Grade D shipbuilding steel plates?

Yes. All our shipbuilding steel plates come with original factory test certificates (MTCs) stamped and approved by surveyors from the China Classification Society (CCS) in accordance with EN 10204 3.2.

# 6Q:What are the differences between CCS Grade A, B, D and E shipbuilding steel plates?

The main difference between CCS Grade A, B, D and E shipbuilding steel plates lies in the impact test temperature requirements.

Grade	Thickness	Impact Test Temperature	Impact Energy, KV₂ / J	Suitable for Marine Environments
CCS A	≤ 50 mm	20 °C	-	Warm marine environments.
CCS B	≤ 50 mm	0 °C	27(Longitudinal), 20(Transverse)	Cold-water marine environments.
CCS D	≤ 50 mm	- 20 °C	27(Longitudinal), 20(Transverse)	Polar marine environments with extremely low temperatures.
CCS E	≤ 50 mm	- 40 °C	27(Longitudinal), 20(Transverse)	Polar/ice regions and ultra-low-temperature deep-sea environments.