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CCS Grade AH36 Shipbuilding Steel Plate - High-Strength Marine Steel Plate

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CCS Grade AH36 shipbuilding steel plates are high-quality, high-strength, low-alloy structural steels for marine applications certified by the China Classification Society (CCS). Offering excellent low-temperature toughness, outstanding weldability and reliable resistance to seawater corrosion, they are a trusted structural material for merchant ships, cargo vessels, offshore platforms and marine equipment projects. Our CCS Grade AH36 shipbuilding steel plates have received full certification from the China Classification Society.

Certification :
CCS Rules
Standard :
GB/T 712
Grade :
CCS Grade AH36 (CCSAH36)
Thickness :
5.0 - 150.0 mm
Width :
1500.0 - 3950.0 mm
Length :
6000.0 - 18000.0 mm

Special thickness, width, and length can be negotiated separately.
We also provide customized processing services.If you have any questions, please contact us.

Overview

1. What is CCS Grade AH36 shipbuilding steel plate?

CCS Grade AH36 shipbuilding steel is a high-strength, low-alloy structural steel for marine applications that complies with China Classification Society (CCS) standards. As a widely used, high-quality shipbuilding steel grade, it offers stable mechanical properties, excellent resistance to seawater corrosion, good toughness and outstanding weldability.

Compared with standard-strength marine steel plates, CCS AH36 shipbuilding steel plates offer higher load-bearing capacity and superior adaptability to extreme environments. In complex marine environments characterised by strong winds, wave impact and seawater erosion, it maintains stable structural strength and toughness, effectively ensuring the structural safety and service life of ships and offshore facilities.

Our CCS Grade AH36 shipbuilding steel plates have been officially certified by CCS and fully comply with international offshore engineering standards, making them a core structural material for shipbuilding, offshore engineering and offshore platform construction.

2. Meaning of the designation

CCS: Certified by the China Classification Society

A: Quality Grade A (requiring impact toughness at 0°C)

H: High-strength steel

36: Minimum yield strength: 355 MPa (≈ 36 kgf/mm²)

Available Specifications and Dimensions

Product	CCS Grade AH36 Shipbuilding Steel Plate
Certification	CCS
Grade	AH36
Material Category	Heigh-Strength Structural Steel for Ship and Ocean Engineering
Thickness	5 - 150 mm
Width	1500 - 3950 mm
Length	6000 - 18000 mm
Delivery Conditions	Hot Rolled (HR), Controlled Rolled (CR), Normalized (N), Thermo-Mechanical Controlled Processed (TMCP).
Surface Conditions	We offer surface preparation services such as sandblasting, rust removal, oiling and spray painting.
Testing	Tensile test, Charpy V-notch impact test, Ultrasonic testing (UT), Z-direction property test (Grades Z15/Z25/Z35), Dimensional inspection.
Applications	Ship hull structures, support structures for offshore oil and gas platforms, marine engineering auxiliary facilities, quay works, marine equipment components, etc.
MOQ	50 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	Nb	V	Ti	Mo	Als
CCS AH36	≤ 0.18	≤ 0.50	0.90 - 1.60	≤ 0.030	≤ 0.030	≤ 0.35	≤ 0.20	≤ 0.40	0.02 - 0.05	0.05 - 0.10	≤ 0.02	≤ 0.08	≥ 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 AH36	≥ 355	490 - 630	≥ 21

Charpy (V-notch) Impact Test

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
CCS AH36	≤ 50	0	≥ 34	≥ 24
	> 50 - 70	0	≥ 41	≥ 27
	> 70 - 150	0	≥ 50	≥ 34

Applications

CCS Grade AH36 high-strength shipbuilding steel plates offer consistent performance, combining high strength with good toughness and weldability. They are primarily used in ship main structures, offshore engineering equipment and heavy-duty infrastructure.

1. Shipbuilding

Main hull structures for bulk carriers, oil tankers and container ships.

2. Offshore Platforms

Support structures for offshore oil and gas platforms and offshore wind power platforms.

3. Offshore Equipment

Offshore support structures, auxiliary facilities for offshore engineering, quay works and components for offshore equipment.

Other Information

Key Advantages of Our CCS Grade AH36 Shipbuilding Steel Plates

1. Full Official CCS Certification

All our CCS AH36 shipbuilding steel plates have been officially certified by the China Classification Society (CCS) and are accompanied by comprehensive test reports and certification documents.

2. Excellent Mechanical Properties

With strong load-bearing capacity and structural stability, these plates can withstand wave impacts, structural torsion and heavy loads encountered during vessel operation, thereby preventing structural deformation and damage.

3. Excellent Weldability and Workability

The steel plates feature a uniform internal structure and low carbon equivalent, resulting in excellent weldability. They also exhibit good workability for cutting, bending, drilling and other processes.

4. Reliable Corrosion Resistance

They possess excellent resistance to electrochemical corrosion in seawater and atmospheric corrosion, significantly reducing the long-term maintenance costs of marine structures.

5. Rigorous Quality Control

Manufactured in accordance with CCS regulations and the Chinese national standard GB/T 712, with quality inspections conducted throughout the entire production process.

Our Service Advantages

1. Stable Supply Chain

Ample stock, prompt delivery and competitive pricing.

2. Customisation Services

We offer cut-to-length services, surface finishing and customisation to special dimensions.

3. Comprehensive Documentation

We can provide CCS certification, factory test reports, inspection certificates and export clearance documents.

4. Global Sea Freight Logistics

We possess extensive experience in international sea freight logistics, ensuring orders are delivered on time.

5. After-Sales Support

We implement strict quality control measures and promptly address any issues relating to product quality and delivery.

FAQ

# 1Q:In which parts of a ship is CCS Grade AH36 shipbuilding steel plate primarily used?

Due to its high strength, it is often used in the manufacture of hull plating, decks, hatch coamings, the bottom of the hull and the topsides—areas that are required to withstand heavy loads.

# 2Q:What is the CCS AH36 equivalent steel in other standards?

CCS Grade AH36 is highly equivalent to ABS Grade AH36, DNV Grade AH36, BV Grade AH36 and LR Grade AH36 under international classification standards.

# 3Q:What are the main differences between CCS AH32 and AH36 shipbuilding steel plates?

The key difference between CCS AH32 and AH36 shipbuilding steel plates lies in their yield strength grades, which directly results in differences in their mechanical properties and applications. Put simply, AH36 is a higher-strength material than AH32.

Comparison Criteria	CCS AH32	CCS AH36
Minimum yield strength	≥ 315 MPa	≥ 355 MPa
Tensile strength	450 - 570 MPa	490 - 630 MPa
Impact energy	31 J (at 0°C)	34 J (at 0°C)
Typical Applications	General-strength sections of the hull structure, such as superstructures and bulkheads.	Critical sections subject to high stresses, such as the hull bottom, sides and decks.