What is CCS A Shipbuilding Steel Plate?
CCS A shipbuilding steel plate is a general-strength marine structural steel approved by the China Classification Society (CCS) . It belongs to the "A" grade under the CCS classification system, which is specifically designed for constructing ship hulls, decks, and other critical marine structures .
Unlike standard carbon steel, CCS A steel is manufactured under strict supervision by CCS-certified mills. It offers a balanced combination of strength, toughness, and weldability, making it the most widely used material for shipbuilding projects that do not require the extreme low-temperature performance of B, D, or E grades.
Why CCS Certification Matters for Your Vessel
The CCS certification serves as a "passport" for your material. As highlighted in recent industry reports, manufacturers must hold a valid CCS factory approval certificate to produce these plates. During delivery, a CCS surveyor must be present to review the process and approve the products before they leave the factory.
Key benefits of CCS certification
Compliance
Ensures the vessel meets international maritime safety standards.
Traceability
Each plate comes with a mill certificate that traces its chemistry back to the original ladle.
Insurance
Protects your project from liability issues related to material failure.
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Technical Specifications and Mechanical Properties
| Element | Composition (Max %) |
|---|---|
| Carbon (C) | ≤ 0.21 |
| Manganese (Mn) | ≥ 2.5 x C |
| Silicon (Si) | 0.10 – 0.35 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Property | Requirement |
|---|---|
| Yield Point (ReH) | ≥ 235 MPa |
| Tensile Strength (Rm) | 400 – 490 MPa |
| Elongation (δ5) | ≥ 22% |
| Impact Test Temperature | 20°C (Longitudinal) |
| Impact Energy (Average) | ≥ 27 J |
The Procurement Checklist: How to Verify Authenticity
1. Document Review (The Mill Certificate)
Ensure the manufacturer provides an original mill test certificate (MTC) that explicitly states
CCS approval stamp and the signature of the attending surveyor.
Heat number (Ladle number) for traceability.
Detailed chemical composition and mechanical test results.
2. Physical Marking
During visual inspection, certified CCS A plates must have the following clearly marked on the steel surface
CCS Mark: The official China Classification Society logo.
Grade: "CCS A" (Note: Some tenders may specify CCSB, but for A-grade, the marking is distinct).
Dimensions: Thickness, width, and length.
Heat Number: Must match the MTC.
3. Surface Quality
The steel must be free from defects such as laminations, cracks, and excessive scale, which could compromise the integrity of the hull during welding.
Industry Applications and Market Demand
The demand for high-quality shipbuilding steel is surging. Reports indicate that shipbuilding steel accounts for 25% to 30% of the total cost of a vessel .
While CCS A is a general-strength steel, it is crucial for:
Hull structures of small to medium-sized vessels.
Inner bottoms and decks where low-temperature impact properties (below 0°C) are not required.
Non-critical structural components of large ocean-going vessels.
Why Choose Us as Your Trusted CCS A Steel Supplier?
Now that you understand the technical requirements, it's time to source from a partner who prioritizes integrity. We don't just sell steel; we provide guaranteed compliance.
Direct Mill Sources: We source exclusively from CCS-approved mills. Our supply chain is transparent, ensuring you receive prime material, not reject plates.
Full Traceability: Every shipment includes the full CCS Mill Certificate. We maintain a strict protocol where the physical steel markings are photographed and matched to the certificate before dispatch.
On-Time Delivery: We understand that shipyard schedules are tight. We guarantee delivery within the agreed lead time to prevent costly project delays.
Global Standards: While we specialize in CCS A, we can also supply steel certified by other major societies including ABS (USA), DNV (Norway), LR (UK), and KR (Korea) to meet your specific project needs
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Choose YUXIN steel group, and what you purchase is not merely the steel plates, but also a complete warranty system and a sense of responsibility.
Our address
Tianjin, China
Phone Number
(86)-15937221771(WeChat)
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info@chinasteelcompany.com
FAQ
01.How are the names of the ship plates determined? For example, what does CCS A mean?
A: Indicates that the strength level is of general strength. The general strength steel plates are divided into four grades: A, B, D, and E. The main difference lies in the test temperature for impact toughness (grade A at 0°C, grade B at 20°C, grade D at -20°C, and grade E at -40°C).
02.When purchasing the ship plates, what documents can you provide?
Traceability: The furnace number and batch number on the certificate must be consistent with the physical markings on the steel plate.
Data: It must include actual measured data such as chemical composition, mechanical properties (yield, tensile strength, impact value), etc.
03.What is the minimum order quantity?
04.Can you provide cutting and processing services?
China one-stop steel processing procurement
Through years of understanding and precipitation of steel, Yuxin Group has now become a mature steel processing and manufacturer, providing various products for many construction companies and steel structure companies around the world. Thanks to Yuxin Group's professionalism and integrity, it has become a world-renowned enterprise.
