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CCS Grade E Shipbuilding Steel Plate - CCS Certified Marine Steel Plate

Q: What is the difference between CCS Grade D and CCS Grade E shipbuilding steel plates?

Key difference: Different low-temperature impact toughness.CCS Grade D steel: Impact test temperature is -20°C.CCS Grade E steel: Impact test temperature is -40°C.

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CCS Grade E Shipbuilding Steel Plate - CCS Certified Marine Steel Plate

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CCS Grade E is a structural steel plate for shipbuilding certified by the China Classification Society (CCS). It offers excellent low-temperature impact toughness, stable mechanical properties, good weldability and resistance to marine corrosion, making it suitable for hull structures and offshore engineering structures in extremely cold marine environments. The CCS Grade E shipbuilding steel plates we supply are high-quality hot-rolled products, strictly conforming to CCS specifications and accompanied by comprehensive certification documentation. Dimensions and heat treatment methods can be customised, and third-party inspection is available to meet the procurement standards of the global shipbuilding industry.

Certification :
CCS Rules
Standard :
GB/T 712
Grade :
CCS Grade E (CCSE)
Thickness :
5.0 - 150.0 mm
Width :
1500.0 - 4000.0 mm
Length :
6000.0 - 18000.0 mm

* Specifications and dimensions can be customized.

* Machining services are available.

Overview

1. What is CCS Grade E shipbuilding steel plate?

CCS Grade E shipbuilding steel plate is a ordinary-strength structural steel for shipbuilding certified by the China Classification Society (CCS). It offers excellent low-temperature impact toughness (-40°C), good weldability, stable ductility and resistance to marine corrosion, enabling it to withstand harsh marine environments. It serves as a key structural material for ocean-going vessels and offshore engineering projects.The high-quality CCS Grade E shipbuilding steel plates we supply are manufactured in strict accordance with official CCS standards. Having undergone rigorous mechanical property testing and non-destructive testing, they fully comply with shipbuilding safety regulations and are suitable for widespread use in the construction of bulk carriers, oil tankers, container ships and offshore platforms worldwide.

2. Meaning of the designation

CCS: Certified by the China Classification Society

E: Quality Grade E (Impact toughness grade: Impact test at -40°C)

Specifications and Dimensions

Product	CCS Grade E Shipbuilding Steel Plate
Certification	CCS
Grade	E
Material Category	Ordinary-Strength Structural Steel for Ship and Ocean Engineering
Thickness	5 - 150 mm
Width	1500 - 4000 mm
Length	6000 - 18000 mm
Delivery Conditions	Normalized (N), Thermo-Mechanical Controlled Processed (TMCP).
Surface Conditions	Surface pretreatment (shot blasting, rust removal, oiling, painting, etc.) is available.
Testing	Tensile test, Charpy V-notch impact test, Ultrasonic testing (UT), Z-direction property test (Grades Z15/Z25/Z35), Dimensional inspection, Custom cutting.
Applications	The construction of ships and offshore structures for cold or polar waters.
MOQ	20 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	Als
CCS E	≤ 0.18	≤ 0.35	≥ 0.70	≤ 0.025	≤ 0.025	≤ 0.35	≤ 0.30	≤ 0.30	≥ 0.015

Carbon Equivalent (wt %)

Thickness (mm)	5 - 50	50 - 150
Typical CEV (wt %)	≤ 0.38	≤ 0.40

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 E	≥ 235	400 - 520	≥ 22

Charpy (V-notch) Impact Test

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
CCS E	≤ 50	- 40	≥ 27	≥ 20
	> 50 - 70	- 40	≥ 34	≥ 24
	> 70 - 150	- 40	≥ 41	≥ 27

Applications

CCS Grade E shipbuilding steel plates offer reliable low-temperature toughness and marine suitability, and are widely used in ships and offshore engineering projects that require good structural stability in low-temperature environments.

1. Key structural components of ships

Widely used in the construction of core sections of large vessels that are subject to complex stresses and have extremely high safety requirements, such as hull plating, main decks, bulkheads and keels. Specifically, this includes:

a) Large bulk carriers and container ships: Used in stress-concentration areas such as the midship section and hatch coamings.

b) Ocean-going fishing vessels and specialised vessels: For example, the main structure of recently delivered ocean-going tuna fishing vessels utilises CCS-approved Grade E materials.

2. Offshore Engineering Equipment

Suitable for facilities such as offshore platforms and marine engineering machinery that are continuously exposed to harsh marine climates and low-temperature environments.

3. Vessels for Polar or Cold-Water Routes

Specifically designed for vessels navigating high-latitude, cold-water seas in winter, particularly those requiring ice-strengthened hull structures for navigation in ice-covered waters.

Other Information

Key Advantages and Features of the Product

1. Excellent Low-Temperature Toughness

Passes the -40°C Charpy V-notch impact test, effectively preventing structural brittle fracture in extremely cold marine environments.

2. Reliable Marine Corrosion Resistance

An optimised alloy composition enhances resistance to seawater corrosion, extending the service life of ship hulls and offshore steel structures.

3. Outstanding Workability

Good cutting, bending and forming properties, coupled with excellent weldability, meet the requirements of various ship hull welding applications.

4. Fully Compliant with CCS Certification

All CCS Grade E shipbuilding steel plates are certified by CCS and come with complete test reports and factory certificates.

5. Full-Range Customisation Services

Customised heat treatment, dimensions and surface treatments are available to meet specific project requirements.

Why choose our CCS Grade E shipbuilding steel plates?

1. CCS certification: Supplied with a Material Test Certificate (MTC) to ensure full traceability.

2. Strict quality control: 100% compliant with CCS standards.

3. Custom processing: We offer value-added services such as cutting and surface rustproofing.

4. Ample stock: Rapid delivery available.

5. Comprehensive after-sales service: Efficient resolution of product quality and logistics issues.

6. Global logistics: Guaranteed on-time delivery.

FAQ

Q1:

What are the weldability characteristics of CCS Grade E shipbuilding steel plates?

They are excellent. Due to its low carbon equivalent (CEV), Grade E offers excellent weldability and is not prone to weld cracking.

However, as it is intended for use in low-temperature environments, it is essential to use low-hydrogen welding consumables certified by the classification society, control the heat input, and carry out pre-welding preheating and post-welding treatment to prevent a reduction in low-temperature toughness at the weld.

Q2:

What is the difference between CCS Grade D and CCS Grade E shipbuilding steel plates?

Key difference: Different low-temperature impact toughness.

CCS Grade D steel: Impact test temperature is -20°C.

CCS Grade E steel: Impact test temperature is -40°C.

Q3:

Under what circumstances is Z-direction testing required for CCS Grade E shipbuilding steel plates?

When CCS Grade E steel plates are used in thick-plate welded T-joints or fillet joints on offshore platforms, and the stress direction is perpendicular to the plate surface, Z-direction performance testing (Z15 / Z25 / Z35) is strongly recommended to prevent the occurrence of laminar tearing.

Q4:

Is CCS Grade E steel equivalent to the grades of other classification societies?

Yes. In accordance with the IACS (International Association of Classification Societies) unified rules, CCS Grade E is equivalent to ABS Grade E, LR Grade E, DNV Grade E and BV Grade E. They possess similar chemical and mechanical properties.

Q5:

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.

Q6:

Do you provide official CCS certificates?

Yes, we can provide material certificates issued by CCS for all our CCS shipbuilding steel plates.

Q7:

What are the differences between CCS Grade A, B, D and E shipbuilding steel plates?

The main difference between CCS Grade A, B, D and E shipbuilding steel plates lies in the impact test temperature requirements.

Grade	Thickness	Impact Test Temperature	Impact Energy, KV₂ / J	Suitable for Marine Environments
CCS A	≤ 50 mm	20 °C	-	Warm marine environments.
CCS B	≤ 50 mm	0 °C	27(Longitudinal), 20(Transverse)	Cold-water marine environments.
CCS D	≤ 50 mm	- 20 °C	27(Longitudinal), 20(Transverse)	Polar marine environments with extremely low temperatures.
CCS E	≤ 50 mm	- 40 °C	27(Longitudinal), 20(Transverse)	Polar/ice regions and ultra-low-temperature deep-sea environments.