CCS Grade A Shipbuilding Steel Plate - CCS Certified Ordinary-Strength Marine Steel

1. What is CCS Grade A shipbuilding steel plate?

CCS Grade A is a standard-strength shipbuilding structural steel certified by the China Classification Society, falling under Grade A of the standard-strength shipbuilding steel series (which also includes Grades B, D and E). It is one of the most commonly used steel grades in the shipbuilding industry, primarily employed for non-critical structural components such as hulls, decks and bulkheads. These components require materials with good weldability and moderate strength, whilst placing no special demands on low-temperature toughness.

2. Meaning of the Designation

CCS: Certified by the China Classification Society

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

Chemical Composition (Heat Analysis, wt %)

Carbon Equivalent (wt %)

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

Tensile test

Charpy (V-notch) impact test

* Where the material has undergone grain refinement treatment and is supplied in a normalised condition, impact testing may be omitted. Where the material is supplied in a TMCP condition, impact testing may be omitted subject to agreement between the supplier and the purchaser.

CCS Class A marine steel plates are widely used in non-critical structural components of small and medium-sized inland and coastal vessels, offering excellent value for money and ease of welding.

1. Shipbuilding

1.1 Inland waterway vessels

Hull plating, decks, bulkheads, superstructures, non-load-bearing ribs/girders.

1.2 Small and medium-sized coastal vessels

Hull plates, secondary cargo hold structures, deckhouses, non-critical engine room supports, walkways and ladders.

2. Offshore Engineering

Non-critical structures for platforms in non-cold water regions, fenders, gangways, mooring components, etc.

3. Port and Marine Equipment

General marine steel structures such as port machinery components, floating docks and offshore storage tanks.

Key Advantages of CCS Grade A Shipbuilding Steel Plates

1. Consistent conventional strength properties

The steel plates have a minimum yield strength of 235 MPa and a tensile strength range of 400 - 520 MPa; their uniform mechanical properties ensure the structural stability of conventional marine components.

2. Excellent weldability and workability

CCS Grade A shipbuilding steel plates are easy to cut, bend and roll. Designed with a low carbon equivalent, they are easy to weld and suitable for all common marine welding processes, with a low susceptibility to cold cracking.

3. Good Resistance to Atmospheric and Seawater Corrosion

The optimised alloy composition enhances the material’s resistance to marine salt spray environments and humid atmospheres, thereby extending the service life of hull plating and deck structures.

Why choose our CCS Grade A shipbuilding steel plates?

1. CCS certification and traceability

Each batch of products comes with an original Manufacturer’s Test Certificate (MTC) and full CCS certification, and is subject to third-party inspection by SGS, BV, LR and others.

2. Customisable Dimensions

Thickness: 5 - 150 mm; Width: 1,500 - 4,000 mm; Length: 6,000 - 18,000 mm.

3. Value-Added Services

Custom cutting, bending, rolling, drilling and surface anti-corrosion treatment.

4. Competitive Pricing and On-Time Delivery

We offer a competitive pricing structure and guarantee on-time delivery.

5. 24/7 After-Sales Service

Our team provides round-the-clock technical support.

• Corrosion Resistance of CCS Grade A Shipbuilding Steel Plates in Marine Environments and Coating Solutions

• Differences between and Selection of CCS Grade A, B, D and E Ordinary-Strength Marine Steel Plates

• CCS Grade A Shipbuilding Steel Plate Dimensions and Tolerances

• Welding of CCS Grade A Shipbuilding Steel Plates

• CCS A Marine Structural Steel Equivalent Grade