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LR Grade EH36 Shipbuilding Steel Plate - Low-Temperature Marine Structural Steel

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LR Grade EH36 is a high-strength, cryogenic marine structural steel plate certified by Lloyd’s Register (LR). It is specifically designed for heavy-duty polar offshore engineering, Arctic deepwater platforms, large-scale shipbuilding in extremely cold regions, and marine structures operating in extreme low-temperature environments. It maintains structural integrity and long-term operational safety under harsh ice conditions and high cyclic loading. We supply LR Grade EH36 shipbuilding steel plates in a full range of specifications. The products come with complete LR certification and factory test reports, and we support inspections by internationally recognized third-party organizations (SGS, BV, etc.) as well as one-stop custom processing services.

Certification :
LR Rules
Grade :
LR Grade EH36 (LR EH36)
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 EH36 shipbuilding steel plate?

LR Grade EH36 shipbuilding steel plate is a high-strength, cryogenic marine structural steel certified by Lloyd’s Register (LR). It is specifically designed for extreme low-temperature environments such as polar heavy-duty vessels, deep-sea platforms, and polar offshore engineering projects, and meets requirements for extreme low-temperature toughness, high structural stiffness, long-term fatigue resistance, and performance under severe service conditions.

Key performance characteristics include ultra-low-temperature impact toughness at -40°C, high strength, excellent weldability, structural stability, and resistance to seawater corrosion, enabling the material to maintain structural integrity and long-term operational safety under harsh sea conditions in ice-covered waters and under high cyclic loads.

It is the ideal material choice for high-standard Arctic engineering projects, polar shipbuilding, deep-sea platforms, and critical offshore infrastructure in extremely cold regions 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

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

Available Specifications and Dimensions

Product Name	LR Grade EH36 Shipbuilding Steel Plate
Certification	LR (Supports dual or multiple certifications from major classification societies such as CCS, ABS, BV, DNV, and NK.)
Grade	EH36
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 EH36	≤ 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 %)	≤ 0.38	≤ 0.40

* 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 EH36	≥ 355	490 - 630	≥ 21

Impact Properties

Grade	Thickness, mm	Temperature, ℃	Impact Energy, KV₂ / J
Grade	Thickness, mm	Temperature, ℃	Longitudinal	Transverse
LR EH36	≤ 50	- 40	≥ 34	≥ 24
	> 50 - 70	- 40	≥ 41	≥ 27
	> 70 - 150	- 40	≥ 50	≥ 34

Characteristics and Advantages

1. Full LR Certification

Officially recognized by Lloyd’s Register (LR) with complete certification.

2. -40°C Ultra-Low-Temperature Toughness

Consistently passes impact tests in extremely cold environments, ensuring safe operation at low temperatures.

3. Excellent Load-Bearing Capacity

High-strength performance meets the design requirements for heavy-load marine structures.

4. Good Weldability and Workability

Compatible with mainstream welding and fabrication processes, offering a wide construction window.

5. Resistance to Marine Corrosion

Effectively resists seawater and salt spray corrosion, extending the service life of structures.

6. Consistent and Stable Quality

Uniform performance in mass production ensures reliable quality.

Applications

1. Construction of Large Polar Vessels

Applicable to the core load-bearing structures of polar icebreakers, large polar exploration vessels, polar ocean-going merchant ships, ultra-large bulk carriers, ultra-large crude oil carriers, and large container ships, including hull plating, heavy-duty decks, reinforced bulkheads, and pressure-bearing bottom components for operations in polar regions.

2. Polar Offshore Engineering

Applicable to key load-bearing components, support systems, and jacket structures for polar deep-sea oil and gas platforms, offshore wind power foundations in cold regions, and cryogenic heavy-duty offshore engineering equipment.

3. Ports and Coastal Infrastructure in Extremely Cold Regions

Applicable to heavy-duty auxiliary facilities at coastal ports in extremely cold regions, large-scale floating infrastructure, and coastal engineering structures in cold regions.

FAQ

Q1:

What are the main differences between LR EH36 and LR DH36 marine steels?

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

LR EH36: Suitable for extremely cold polar environments, with stable ultra-low-temperature impact toughness at -40°C;

LR DH36: Suitable only for conventional low-temperature environments down to -20°C; it does not meet the safety requirements for polar projects.

Both have a minimum yield strength of 355 MPa, but EH36 offers greater adaptability to extreme environments and broader engineering applicability, covering all application scenarios for DH36.

Q2:

Is LR EH36 shipbuilding steel suitable for the construction of polar icebreakers?

Yes. LR EH36 shipbuilding steel is the core structural steel used in polar icebreakers and heavy-duty polar offshore facilities. It features high load-bearing capacity and impact toughness at temperatures as low as -40°C, enabling it to effectively withstand extreme cold and impact loads from ice waves, and fully meet the stringent safety and durability requirements of polar navigation projects.

Q3:

Is LR Grade EH36 marine steel plate compatible with other classification society standards?

Yes. Our LR Grade EH36 marine steel plate fully complies with the relevant marine steel standards of major classification societies, including CCS, ABS, BV, NK, and DNV. We can provide dual or multiple classification society joint certifications based on customer requirements to meet the acceptance standards for offshore engineering projects in ultra-cold regions across different countries or regions.

Q4:

Does your LR Grade EH36 shipbuilding steel plate come with official LR certification?

Yes. All of our LR Grade EH36 shipbuilding steel plates hold valid official certification from Lloyd’s Register (LR) and EN 10204 3.2 factory test reports. These certificates are recognized worldwide and meet the requirements for international shipyard tenders, polar offshore engineering acceptance, and cross-border customs clearance.

Q5:

What are the main differences between LR EH32 and LR EH36 shipbuilding steel plates?

Both possess ultra-low-temperature impact toughness at -40°C. The key differences lie in their strength grades and intended applications:

LR EH32: Minimum yield strength of 315 MPa; excellent formability; better value for money; suitable for conventional ultra-low-temperature offshore structural engineering;

LR EH36: Minimum yield strength of 355 MPa; offers greater load-bearing capacity and is specifically designed for heavy-duty cryogenic offshore engineering projects with higher structural safety requirements and load demands.