Products FAQ
In ship hull structures, in which parts are CCS Grade B shipbuilding steel plates primarily used?
They are widely used in non-core or moderately stressed parts of the hull structure, primarily including:
outer plates (hull plates, non-ice-class reinforced sections), decks, inner bottom plates and bulkheads, superstructures and bridge decks.
What are the weldability characteristics of CCS Grade B shipbuilding steel plates?
CCS Grade B shipbuilding steel plates have low carbon content and carbon equivalent, and exhibit excellent weldability. Under normal circumstances, preheating is not required during welding; however, when working with thick plates or in extremely low-temperature environments, it is recommended to carry out preheating in accordance with specific process requirements.
What grade in other overseas classification societies does CCS Grade B correspond to? Are they interchangeable?
Based on the unified standards of the International Association of Classification Societies (IACS), CCS Grade B is technically equivalent to Grade B ordinary carbon steel in other classification societies. Common equivalent grades include:
ABS Grade B, LR Grade B, DNV Grade B, BV Grade B.
Note: Although the technical standards are identical, whether they can be directly interchanged in actual shipbuilding depends on the classification society supervising the construction. If a newbuild vessel is subject to a single-classification survey by CCS, the use of Grade B plates certified by other classification societies typically requires re-certification or special approval from the surveyor.
What is the maximum delivery thickness for CCS Grade B shipbuilding steel plates? What are the typical delivery conditions?
1. Thickness range
CCS B shipbuilding steel plates is typically supplied in thicknesses ranging from 5 mm to 100 mm.
2. Delivery condition
| Thickness (mm) | Delivery condition |
|---|---|
| ≤ 25 | Hot-rolled (AR), Controlled-rolled (CR) |
| > 25 – 50 | Controlled-rolled (CR), Normalised (N) |
| > 50 | Normalised (N), Thermomechanical controlled process (TMCP) |
What surface treatment options are available?
We offer pre-treatment services, including shot blasting and priming, to prevent corrosion during transport and storage.
What are equivalent grades of CCS Grade A?
International equivalents: ABS Grade A, DNV Grade A, BV Grade A, LR Grade A, etc.
All these grades have similar chemical and mechanical properties and are interchangeable in general shipbuilding.
Which standards do your CCS Grade A shipbuilding steel plates comply with?
Our CCS Grade A shipbuilding steel plates comply with the GB/T 712-2022 Chinese Standard for Shipbuilding Steels and meet the IACS Code. They have been officially certified by the China Classification Society (CCS) and are suitable for use in commercial shipping projects worldwide.
Can you carry out painting and rust removal on CCS marine steel plates?
Yes, we offer shot blasting for rust removal and primer coating services, in accordance with ISO standards.
What is the difference between CCS Grade A and Grade B shipbuilding steel plates?
The main difference lies in the impact test temperature requirements. Grade A typically does not require impact testing at room temperature, whereas Grade B must be tested at 0°C and is suitable for slightly colder marine environments.
Do you provide official CCS certificates?
Yes, we can provide material certificates issued by CCS for all our CCS shipbuilding steel plates.
