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LR Grade EH32 Shipbuilding Steel Plate - Low-Temperature Marine Structural Steel

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LR Grade EH32 shipbuilding steel plate is a cryogenic high-strength hull structural steel certified by Lloyd’s Register (LR). It combines excellent resistance to seawater corrosion, weldability, fatigue resistance, and workability, making it a core structural material for polar vessels, ocean-going vessels operating in extremely cold regions, and deep-sea engineering projects with stringent low-temperature safety requirements. We supply LR Grade EH32 shipbuilding steel plates in a full range of specifications. The products come with complete LR certification and factory test reports, and we provide comprehensive support for one-stop custom processing services and third-party authoritative inspections.

Certification :
LR Rules
Grade :
LR Grade EH32 (LR EH32)
Thickness :
5.0 - 150.0 mm
Width :
1,500.0 - 4,000.0 mm
Length :
6,000.0 - 18,000.0 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 LR Grade EH32 shipbuilding steel plate?

LR Grade EH32 shipbuilding steel plate is a cryogenic high-strength hull structural steel certified by Lloyd’s Register (LR), specifically designed for polar-class vessels, Arctic offshore operations, cryogenic offshore engineering, and deep-sea structural projects. Its core properties include impact toughness at -40°C, stable mechanical strength, excellent weldability and formability, as well as outstanding resistance to seawater corrosion, fatigue, and extreme temperature fluctuations. Under extremely cold conditions and alternating marine loads, this material maintains complete structural stability and long-term durability, making it the preferred cryogenic structural steel for polar shipbuilding, Arctic offshore platforms, and cryogenic marine infrastructure projects worldwide.

2. Meaning of the Designation

LR: Certified by Lloyd’s Register (LR)

E: Quality grade E (Must meet the requirements of the impact test at -40°C)

H: High strength

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

Available Specifications and Dimensions

Product Name	LR Grade EH32 Shipbuilding Steel Plate
Certification	LR (Supports dual or multiple certifications from major classification societies such as CCS, ABS, BV, DNV, and NK.)
Grade	EH32
Classification	High-Strength Structural Steel for Ship and Ocean Engineering
Thickness	5 - 150 mm
Width	1,500 - 4,000 mm
Length	6,000 - 18,000 mm
Delivery Conditions	Normalized (N), Thermo-Mechanical Controlled Processed (TMCP).
Surface Conditions	Original as-rolled scale, No cracks, scarring, delamination, inclusions, or deep scratches.
Machining Services	Precision cutting, bending, drilling, beveling, surface rust removal, shot blasting, anti-corrosion coating, and customized secondary processing.
Inspection	Charpy V-notch impact test, Ultrasonic testing (UT), Z-direction property test (Grades Z15/Z25/Z35), Third-party test (such as SGS, BV), etc.
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

Chemical Composition

(Heat Analysis, wt %)

Grade	C	Si	Mn	P	S	Cu	Cr	Ni	Nb	V	Ti	Mo	Als
LR EH32	≤ 0.18	≤ 0.50	0.90 - 1.60	≤ 0.025	≤ 0.025	≤ 0.35	≤ 0.20	≤ 0.40	0.02 - 0.05	0.05 - 0.10	≤ 0.02	≤ 0.08	≥ 0.015

Carbon Equivalent

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

Grade	Yield Strength (ReH), MPa	Tensile Strength (Rm), MPa	Elongation (A), %
LR EH32	≥ 315	450 - 570	≥ 22

Impact Properties

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
LR EH32	≤ 50	- 40	≥ 31	≥ 22
	> 50 - 70	- 40	≥ 38	≥ 26
	> 70 - 150	- 40	≥ 46	≥ 31

Characteristics and Advantages

1. Comprehensive Certification by the Authoritative LR

The entire product line holds LR classification society certification and Manufacturer’s Test Certificates (MTC), and third-party inspection support from SGS, BV, and others is available upon request.

2. Exceptional Toughness at -40°C

Effectively eliminates the risk of brittle fracture in structural steel in cold-water regions, ensuring safe service in extremely cold environments.

3. Stable Medium-to-High Strength Load-Bearing Performance

Capable of withstanding medium-to-heavy loads on ship hulls and offshore facilities over the long term and reliably, while withstanding wave impact, seawater pressure, and cyclic stresses.

4. Excellent Low-Temperature Weldability and Workability

Facilitates precision on-site machining and high-quality welding in cold environments, significantly improving construction efficiency and reducing overall project costs.

5. Outstanding Adaptability to Extreme Marine Environments

Combines excellent resistance to seawater corrosion, salt spray aging, wet-dry cycling erosion, and wave scouring.

6. Consistent and Stable Batch Quality

Relying on mature, standardized processes and multi-stage quality control, it ensures highly consistent product performance that meets the stringent requirements of high-end marine engineering projects.

7. Reliable Bulk Supply Capacity

Adequate spot inventory supports the fulfillment of large-volume custom orders and global export orders.

Applications

1. Polar and Offshore Vessel Construction

Core load-bearing structures for large polar merchant ships, ultra-large bulk carriers, crude oil tankers, and container ships, including hull plating for cold-region operations, heavy-duty decks, keels, reinforced bulkheads, and pressure-bearing bottom components.

2. Polar Offshore Engineering

Primary load-bearing structures, equipment foundations, support trusses, and auxiliary deck components for polar and deep-sea oil and gas platforms, polar wind power facilities, and cryogenic offshore engineering equipment.

3. Cold-Region Ports and Coastal Infrastructure

Low-temperature-resistant structural components for large-scale docks in extremely cold regions, heavy-duty port auxiliary facilities, Arctic shipping route infrastructure, and cold-region marine piers.

4. Specialized Low-Temperature Vessels

Polar research vessels, Arctic auxiliary transport vessels, cold-region engineering vessels, and heavy-duty floating port facilities subject to stringent low-temperature safety requirements.

5. Low-Temperature Vessel Maintenance and Structural Upgrades

Structural replacement, low-temperature toughness reinforcement, and safety performance upgrades for vessels and offshore facilities in cold regions.

FAQ

Q1:

What is the main difference between LR EH32 and LR DH32 marine steel plates?

The key difference between the two lies in their low-temperature impact toughness ratings.

LR EH32: Requires impact toughness at -40°C, offers excellent resistance to brittle fracture, and is suitable for polar and extremely cold marine environments;

LR DH32: Requires impact toughness at -20°C only; it is suitable for conventional low-temperature scenarios but does not meet the safety standards for polar projects.

Both have a minimum yield strength of 315 MPa, but LR EH32 has a broader low-temperature operating range and is suitable for more severe polar conditions.

Q2:

What is the application of LR Grade EH32 shipbuilding steel plate?

LR Grade EH32 is a Grade 32 high-strength structural steel plate for shipbuilding that offers excellent low-temperature impact toughness at -40°C and stable load-bearing capacity. It is primarily used in the core load-bearing structures of polar ocean-going vessels, oil tankers, and bulk carriers operating in cold regions, as well as in critical support components for polar deep-sea offshore platforms and marine engineering facilities in extremely cold regions. It is the ideal material for shipbuilding and polar marine engineering projects in extremely cold regions worldwide.