CCS Grade D Shipbuilding Steel Plate – High-Quality Marine Steel for Demanding Ocean Conditions
CCS Grade D shipbuilding steel plate is a normal-strength structural steel certified by the China Classification Society (CCS), specifically designed for the construction of ships and marine vessels that operate in cold ocean waters with temperatures as low as -20°C. As a member of the general strength structural steel family, CCS Grade D offers excellent low-temperature impact toughness, superior weldability, and reliable mechanical properties essential for safe marine operations.
Whether you are building ocean-going cargo vessels, offshore platforms, or specialized marine equipment, CCS Grade D shipbuilding steel plate delivers the durability and performance standards required by international classification societies.
Quality Assurance | Fully Certified & Traceable
One-stop steel procurement
Certifications: We supply CCS D certificate.
Traceability: Each plate is stamped with grade, heat number, and dimensions.
Inspection: Third-party inspections (SGS, BV) are welcome at our loading port.
Key Specifications of CCS Grade D Shipbuilding Steel Plate
Chemical Composition (Ladle Analysis)
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.21 |
| Manganese (Mn) | ≥ 0.60 |
| Silicon (Si) | 0.10 – 0.35 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Aluminum (Als) | ≥ 0.015 (for fine grain treatment) |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (min) | 235 MPa (34 ksi) |
| Tensile Strength | 400 – 520 MPa (58 – 75 ksi) |
| Elongation (min) | 21% – 22% |
| Impact Test Temperature | -20°C |
| Impact Energy (Longitudinal) | ≥ 27 J (average) |
Available Dimensions
| Parameter | Range |
|---|---|
| Thickness | 3mm – 300mm (up to 400mm upon request) |
| Width | 1000mm – 4200mm |
| Length | 3000mm – 18000mm |
Heat Treatment Options
AR (As Hot Rolled)
N (Normalized) – Recommended for thickness > 40mm
TMCP (Thermo-Mechanical Controlled Processing)
Q+T (Quenched and Tempered)
CR (Controlled Rolling)
Applications of CCS Grade D Shipbuilding Steel Plate
Ship Hull Construction
Shell plates, deck plates, and bulkhead structures.
Offshore Projects
Fixed platforms, floating production storage and offloading (FPSO) units.
Marine Engineering
Ship frames, keels, and structural reinforcements.
Cold-Water Vessels
Ships operating in polar and sub-polar regions where low-temperature toughness is critical.
| Feature | CCS Grade A | CCS Grade B | CCS Grade D | CCS Grade E |
|---|---|---|---|---|
| Yield Strength (min) | 235 MPa | 235 MPa | 235 MPa | 235 MPa |
| Tensile Strength | 400 – 520 MPa | 400 – 520 MPa | 400 – 520 MPa | 400 – 520 MPa |
| Elongation (min) | 22% | 22% | 22% | 22% |
| Impact Test Temperature | +20°C (not required) | 0°C | -20°C | -40°C |
| Impact Energy (Longitudinal) | 27 J (expected at 20°C) | 27 J | 27 J | 27 J |
| Deoxidation Method | Any method (t≤50mm); Killed (t>50mm) | Any method (t≤50mm); Killed (t>50mm) | Killed & fine-grained | Killed & fine-grained |
| Carbon (C) Max | 0.21% | 0.21% | 0.21% | 0.18% |
| Manganese (Mn) Min | ≥ 2.5 × C | ≥ 0.80% | ≥ 0.60% | ≥ 0.70% |
| Silicon (Si) Max | 0.50% | 0.35% | 0.35% | 0.35% |
| Aluminum Treatment | Not required | Not required | ≥ 0.015% (t>25mm) | ≥ 0.015% |
| Typical Applications | General ship structures, interior components | Ship hulls in moderate climates | Vessels for cold ocean waters (below -20°C) | Arctic and extreme cold environment vessels |
| Condition of Supply (t≤35mm) | Any | Any | Any | Normalized or TMCP |
| Condition of Supply (t>35mm) | Normalized/CR/TM | Normalized/CR/TM | Normalized/CR/TM | Normalized or TMCP |
How to Choose the Right Grade
CCS Grade A: Suitable for general structural components in non-critical areas where low-temperature impact performance is not required.
CCS Grade B: Recommended for hull structures operating in moderate climates where basic impact toughness at 0°C is acceptable.
CCS Grade D: The preferred choice for vessels navigating cold ocean waters where the operating temperature can drop to -20°C. Features killed and fine-grained steel for superior low-temperature performance.
CCS Grade E: Designed for the harshest conditions, including Arctic and polar waters, with impact testing at -40°C and stricter chemical composition limits.
why choose us?
✅ Certified Quality: 100% compliant with CCS latest standards.
✅ Excellent Low-Temperature Performance: Impact tested at -20°C for guaranteed reliability.
✅ Customizable Dimensions: Wide size range to meet diverse project requirements.
✅ Fast Delivery: 10,000 tons monthly production capacity.
✅ Full Certification: Mill test certificates under EN 10204 Format 3.1/3.2.
✅ Competitive Pricing: Direct from manufacturer, no middleman fees.
Get the quotation within 24 hours
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User Evaluation
"We ordered 850 tons of CCS Grade D plates for a new fishing trawler operating in the Barents Sea. The impact test results at -20°C were flawless, and the weldability was outstanding even in cold shop conditions. Delivery was ahead of schedule. Highly recommended.
Captain Mikhail Petrov
Shipyard Manager
Ms. Li Wei,
Procurement Director, Dalian Shipbuilding Co.
Mr. Hans Müller
Senior Engineer, Hamburg Offshore Engineering
FAQ
01.What is the difference between CCS Grade D and Grade A shipbuilding steel?
The primary difference is the impact test temperature. Grade A does not require impact testing (tested at +20°C), while Grade D is impact tested at -20°C with a minimum energy absorption of 27 Joules. Grade D also requires killed steel and fine grain treatment for better low-temperature performance, making it suitable for cold ocean waters where Grade A would be unsafe.
02.Can CCS Grade D be welded without preheating?
03.What heat treatment condition should I choose for CCS Grade D plates?
It depends on your thickness and application:
As-rolled (AR): Suitable for thicknesses up to 35mm in general structures.
Normalized (N): Recommended for thicknesses above 40mm to refine grain structure and ensure uniform mechanical properties.
TMCP: Preferred for heavy plates (over 60mm) requiring high toughness and excellent weldability.
We can advise based on your specific design requirements.
04.Do you provide third-party inspection and certification?
Absolutely. We offer full third-party inspection services by SGS, TUV, or BV, and all plates come with mill test certificates under EN 10204 Type 3.1 as standard. Type 3.2 certification is also available upon request, witnessed by your nominated classification society (ABS, LR, DNV, etc.). We can also arrange ultrasonic testing (UT) and Z-direction tests as needed.
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