Inquiry Now

LR Grade E Shipbuilding Steel Plate - Ordinary-Strength Marine Structural Steel

info@yx-steel.com 8615837212056 Get a Quote

LR Grade E is a ordinary-strength shipbuilding structural steel plate certified by Lloyd’s Register (LR) that features low-temperature impact toughness down to -40°C, as well as excellent weldability, structural stability, and resistance to seawater corrosion and cold fatigue. It is widely used in polar vessels, cryogenic offshore engineering, and projects in extreme marine environments. We offer the full range of specifications, with products accompanied by official LR certification and factory test reports, and support dual or multiple certifications from major classification societies such as CCS, ABS, BV, and DNV.

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

LR Grade E shipbuilding steel plates are ordinary-strength hull structural steel plates certified by Lloyd’s Register (LR) and developed specifically for extreme low-temperature marine environments.

Their core properties include excellent low-temperature toughness at -40°C, good structural stability, resistance to seawater corrosion, weldability, and workability, making them a key material for polar vessels, cryogenic offshore platforms, and extreme marine engineering projects.

2. Grade Interpretation

LR: Certified by Lloyd’s Register (LR)

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

Available Specifications and Dimensions

Product Name	LR Grade E Shipbuilding Steel Plate
Certification	LR (Supports third-party certification by SGS, BV, DNV, ABS, CCS, and others.)
Grade	LR E
Classification	Ordinary-Strength Structural Steel for Ship and Ocean Engineering
Thickness	5 - 150 mm
Width	1500 - 4000 mm
Length	6000 - 18000 mm
Delivery Conditions	Thermo-Mechanical Controlled Processed (TMCP), Normalized (N), Quenched and Tempered (Q+T).
Surface Conditions	Original black oxide layer, 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), etc.
Applications	Widely used in shipbuilding for polar waters and cryogenic offshore engineering projects.
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

Element	C	Si	Mn	P	S	Cu	Cr	Ni	Als
Content (wt %)	≤ 0.18	≤ 0.35	≥ 0.70	≤ 0.025	≤ 0.025	≤ 0.35	≤ 0.30	≤ 0.30	≥ 0.015

Carbon Equivalent

Thickness (mm)	5 - 50	50 - 150
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), %
LR E	≥ 235	400 - 520	≥ 22

Charpy (V-notch) impact test

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

Applications

1. Construction of Polar/Ice-Class Vessels

Core load-bearing structures for polar expedition vessels, icebreaking support vessels, high-latitude ocean-going bulk carriers, and cargo ships.

2. Cryogenic Offshore Engineering Facilities

Polar offshore platforms, deep-sea cryogenic drilling support equipment, floating offshore facilities, and support structures for cryogenic pipelines.

3. Ship Repair and Refitting

Structural renewal, thickening and reinforcement, and replacement of damaged sections for ocean-going vessels, ice-class vessels, and offshore platforms.