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CCS Grade DH32 Shipbuilding Steel Plate - Certified High-Strength Marine Steel Plate

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CCS DH32 shipbuilding steel plates are specifically designed for medium-to-high stress marine environments, offering exceptional high yield strength and excellent low-temperature impact toughness at -20°C. They are suitable for applications such as ship hull structures, offshore drilling platforms and marine engineering projects. We supply high-quality CCS DH32 shipbuilding steel plates that have been fully certified by the China Classification Society (CCS). All our CCS DH32 shipbuilding steel plates undergo rigorous testing and are supplied with a factory MTC.

Certification :
CCS Rules
Standard :
GB/T 712
Grade :
CCS Grade DH32 (CCSDH32)
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 DH32 shipbuilding steel plate?

CCS DH32 shipbuilding steel plate is a high-strength structural steel plate for marine applications certified by the China Classification Society (CCS). It is characterised by stable mechanical properties, excellent weldability, good corrosion resistance and reliable low-temperature impact resistance, and fully complies with GB/T 712-2022 and the official CCS certification standards. Designed specifically for the harsh marine and offshore engineering environments, CCS DH32 shipbuilding steel plates are widely recognised and adopted in shipbuilding projects worldwide, serving as a common structural material for coastal and ocean-going vessels, as well as offshore marine facilities.

2. Meaning of the designation

CCS: Certified by the China Classification Society

D: Quality Grade D (requiring impact toughness at -20°C)

H: High-strength steel

32: Minimum yield strength: 315 MPa (≈ 32 kgf/mm²)

Available Specifications and Dimensions

Product	CCS Grade DH32 Shipbuilding Steel Plate
Certification	CCS
Grade	DH32
Material Category	Heigh-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	The surface is in its original condition; surface treatments such as sandblasting, rust removal, oiling and painting are available.
Testing	Tensile test, Charpy V-notch impact test, Ultrasonic testing (UT), Z-direction property test (Grades Z15/Z25/Z35), Dimensional inspection.
Applications	Key structures in shipbuilding, offshore engineering, marine machinery and port engineering facilities, 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	Nb	V	Ti	Mo	Als
CCS DH32	≤ 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 (wt %)

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

Tensile Test

Grade	Yield Strength (ReH), MPa	Tensile Strength (Rm), MPa	Elongation (A), %
CSS DH32	≥ 315	450 - 570	≥ 22

Charpy (V-notch) Impact Test

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
CCS DH32	≤ 50	0	≥ 31	≥ 22
	> 50 - 70	0	≥ 38	≥ 26
	> 70 - 150	0	≥ 46	≥ 31

Applications

CCS DH32 shipbuilding steel plates are widely used in critical structures within shipbuilding and offshore engineering. Specific applications are as follows:

1. Hull Structures

Critical hull components of bulk carriers, ocean-going cargo ships, container ships and oil tankers, such as hull plating and decks, hull frames, and compartment bulkheads.

2. Offshore Engineering

Offshore drilling and production platforms, offshore oil and gas platforms, supporting structures for offshore wind farms, and large-scale deep-sea projects.

3. Marine Machinery

Structural components for large marine equipment, ship cargo hold plates, and stern structural components.

4. Port Engineering Facilities

Load-bearing structures for port machinery, port and onshore facilities, and marine ancillary facilities.

Other Information

Product Advantages of Our CCS DH32 Shipbuilding Steel Plates

Compared to standard shipbuilding steel plates, our CCS DH32 marine steel plates offer outstanding overall performance, addressing the common issues associated with traditional steels, such as poor low-temperature toughness, welding difficulties and structural instability:

1. Excellent Low-Temperature Toughness

CCS DH32 shipbuilding steel plates have undergone rigorous impact testing at -20°C. They can withstand impact loads and structural vibrations in cold marine environments, effectively preventing brittle fracture of the hull structure and ensuring the long-term operational safety of ships and offshore platforms.

2. Exceptional weldability and workability

An optimised low-carbon composition reduces susceptibility to weld cracking. The steel plate supports conventional welding processes as well as subsequent cutting, bending and forming operations, thereby reducing construction complexity and engineering costs.

3. Stable high-strength mechanical properties

With stable yield strength and tensile strength, it meets the heavy-load structural load-bearing requirements of ship hulls and offshore platforms.

4. Reliable Marine Corrosion Resistance

Optimised alloy element composition effectively resists seawater erosion, marine atmospheric corrosion and fatigue under cyclic loading, extending the service life of ships and offshore structures.

5. Diverse Supply Conditions

Available in hot-rolled, controlled-rolled, normalised and TMCP delivery conditions, with support for custom processing to meet diverse engineering and construction requirements.

6. Comprehensive CCS Certification

All shipbuilding steel plates are certified by the China Classification Society (CCS) and are eligible for third-party inspection by international classification societies such as ABS, DNV, BV and LR, meeting the construction standards for global shipbuilding and offshore engineering projects.

Our Service Advantages

As a specialist supplier of CCS DH32 shipbuilding steel plates, we adhere to rigorous quality control standards and offer end-to-end customised services, providing one-stop steel solutions for shipyards and offshore engineering companies worldwide:

1. Authenticity Certification and Quality Assurance

We provide comprehensive factory test certificates and support full compliance with industry standards.

2. Extensive Stock of Specifications

We stock a full range of plate dimensions and can custom-produce special thicknesses on demand, catering to both bulk orders and small-batch trial orders.

3. Cost-Effective Discounted Pricing

With stable supply capabilities, we offer competitive discounted prices to customers worldwide.

4. Value-Added Processing Support

We provide value-added services including cutting, welding and surface treatment.

5. Global Delivery

We have established long-term partnerships with multiple international logistics companies to ensure rapid delivery.

6. After-Sales Service

Our professional 24/7 after-sales team promptly resolves technical and customer service issues.

FAQ

# 1Q:Does your CCS DH32 shipbuilding steel plate support third-party certification?

Yes. All our CCS DH32 shipbuilding steel plates carry official CCS certification and are suitable for testing and certification by international classification societies such as ABS, DNV, BV and LR, in accordance with global requirements for shipbuilding and offshore engineering.

# 2Q:What processing services do you offer for CCS DH32 shipbuilding steel plates?

We provide customised processing services including ultrasonic testing, Z-direction testing, low-temperature impact testing, cut-to-size cutting, surface treatment (sandblasting, rust removal, oiling and painting, etc.), and heat treatment, to meet a wide range of engineering and construction requirements.

# 3Q:What is the main difference between CCS DH32 and ABS DH32?

The key difference between the two lies in the certification body and the corresponding flag state requirements.

CCS DH32: Applicable to vessels flying the Chinese flag, certified by the China Classification Society (CCS).

ABS DH32: More widely recognised for projects in the United States, South Korea and the Middle East, certified by the American Bureau of Shipping (ABS).

DH32 is a high-strength marine steel plate, and certification from multiple classification societies may be applied for simultaneously as required.

# 4Q:Can your CCS DH32 shipbuilding steel plates be dual-certified by other classification societies?

Yes. Depending on your project requirements, we can supply steel plates with dual or multiple certifications (e.g. CCS/ABS/DNV/BV/LR Grade DH32), offering you maximum flexibility for international shipbuilding projects.

# 5Q:What is the difference between CCS Grade AH32 and DH32 steel?

In the China Classification Society (CCS) rules, both AH32 and DH32 are classified as high-strength structural steels for shipbuilding (both with a yield strength of 315 MPa). The key difference between them lies in the temperature at which the impact toughness test is conducted, which directly determines their resistance to brittle fracture at different ambient temperatures.

Performance	CCS AH32	CCS DH32	Notes
Yield Strength (ReH)	≥ 315 MPa	≥ 315 MPa	With the same yield strength.
Tensile Strength (Rm)	450 - 570 MPa	450 - 570 MPa	With the same tensile strength.
Elongation (A)	≥ 22%	≥ 22%	The same capacity for plastic deformation.
冲击试验温度	0 °C	-20 °C	Key differences.
Impact Energy Requirements (KV2)	≥ 31 J	≥ 31 J	Toughness requirements at low temperatures.