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DNV Grade AH32 Shipbuilding Steel Plate - NV A32 High-Strength Marine Steel

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DNV Grade AH32 shipbuilding steel plates are high-quality, high-strength structural steel plates certified by DNV (Det Norske Veritas) and are widely used in ship hull structures, decks, offshore platforms, and marine engineering projects. Our DNV Grade AH32 shipbuilding steel plates strictly comply with DNV standards and come with full DNV certification and complete factory test certificates. We offer custom cutting, surface treatment, and third-party inspection services.

Certification :
DNV Rules
Grade :
DNV Grade AH32 (NV A32)
Thickness :
5.0 - 150.0 mm
Width :
1500.0 - 4000.0 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 DNV Grade AH32 shipbuilding steel plate?

DNV Grade AH32 shipbuilding steel plate is a high-quality, high-strength structural steel plate certified by DNV (Det Norske Veritas). It offers excellent toughness, weldability, and corrosion resistance, and is a commonly used structural steel plate in shipbuilding and offshore engineering, employed in the fabrication of ship hulls, offshore platform structures, and marine engineering structures.

2. Meaning of the Designation

DNV: Certified by the Det Norske Veritas (DNV)

A: Quality grade A (Impact testing must be conducted at -40°C)

H: High-strength steel

32: Minimum yield strength: 315 MPa (≈ 32 kgf/mm²)

Available Specifications and Dimensions

Product	DNV Grade AH32 Shipbuilding Steel Plate
Certification	DNV
Grade	NV A32
Classification	High-Strength Structural Steel for Ship and Ocean Engineering
Thickness	5 - 150 mm
Width	1500 - 4000 mm
Length	6000 - 18000 mm
Delivery Conditions	Hot Rolled (HR), Controlled Rolled (CR), Normalized (N), Thermo-Mechanical Controlled Processed (TMCP), Quenched and Tempered (Q+T).
Surface Conditions	The surface is in its original condition; surface treatments such as sandblasting, rust removal, oiling and painting are available.
Testing	Tensile test, Charpy V-notch impact test, Ultrasonic testing (UT), Z-direction property test (Grades Z15/Z25/Z35).
Applications	It is primarily used in critical structural components of container ships, bulk carriers, oil tankers, and other vessels, as well as in offshore platforms and pipelines.
MOQ	5 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
Quality	Provide complete Mill Test Certificates (MTCs) and DNV certification, and support third-party testing by SGS, BV, and others.

Chemical Composition

Chemical Composition (Heat Analysis, wt %)

Grade	C	Si	Mn	P	S	Cu	Cr	Ni	Nb	V	Ti	Mo	Als
NV A32	≤ 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 %)	≤ 0.36	≤ 0.38

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), %
NV A32	≥ 315	450 - 570	≥ 22

Charpy (V-notch) Impact Test

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
NV A32	≤ 50	0	≥ 31	≥ 22
	> 50 - 70	0	≥ 38	≥ 26
	> 70 - 150	0	≥ 46	≥ 31

Applications

1. Shipbuilding

Ocean-going cargo ships: Key load-bearing components of container ships, bulk carriers, and oil tankers, including decks, outer hull plating, bulkheads, and keel frames.

Special-purpose vessels: Superstructures and hull frames of ferries, cruise ships, and yachts.

2. Offshore Engineering

Offshore Oil and Gas Platforms: Main platform structures, jackets, joints, and deck supports designed to withstand wave, current, and dead loads.

Subsea Engineering: Subsea pipeline support structures, risers, and pile foundations with resistance to seawater corrosion and high-pressure environments.

Offshore Wind Facilities: Foundations and transition sections for offshore wind turbine towers, engineered for harsh marine environments.

3. Ship Repair

Hull repair, structural reinforcement, and component replacement.

4. Other Industrial Applications

Heavy Machinery: Port heavy machinery, coastal infrastructure, offshore heavy equipment, and load-bearing structures for heavy machinery.

Bridges and Buildings: Main girders and piers of coastal bridges, and load-bearing structures of high-rise buildings.

Other Information

Key Features and Advantages

1. DNV Certification

We provide DNV certification, which complies with international maritime standards and is suitable for use in export vessels and offshore engineering projects.

2. High Strength and Toughness

Yield strength ≥ 315 MPa, with excellent impact performance at 0°C, effectively withstanding wave impact, cyclic loading, and seawater corrosion.

3. Excellent Welding and Machinability

Low carbon equivalent, compatible with various welding processes; crack-free 180° cold bending, easy to cut, bend, and form.

4. Exceptional Corrosion Resistance

Enriched with corrosion-resistant alloying elements such as Cu and Ni, it resists seawater corrosion and marine microbial attack, significantly extending the service life of the hull.