Product Overview
We supply high-performance LR Marine Plate Materials engineered for harsh ocean environments. From structural hull plates to ice-class offshore platforms, our materials deliver strict chemistry control, exceptional low-temperature impact toughness, and verified weldability.
Product Specifications
LR Standards Marine Sheet Chemical Composition
|
Steel grade |
C |
Si |
Mn |
P |
S |
Als |
|
Grade A |
≤0.21 |
≤0.50 |
≥2.5C |
≤0.035 |
≤0.035 |
- |
|
Grade B |
≤0.21 |
≤0.35 |
0.8-1.2 |
≤0.035 |
≤0.035 |
- |
|
Grade D |
≤0.21 |
≤0.35 |
0.6-1.2 |
≤0.035 |
≤0.035 |
≥0.015 |
|
Grade E |
≤0.18 |
≤0.35 |
0.7-1.2 |
≤0.035 |
≤0.035 |
≥0.015 |
LR Standards Metal Used In Shipbuilding Mechanical Property
|
Steel grade |
Yield point/MPa |
Tensile point /MPa |
Elongation/% |
Temperature/° C |
V-type impact test |
||
|
Akv/J |
|||||||
|
≤50MM |
50-70MM |
70-100MM |
|||||
|
Grade A |
235 |
400-520 |
≥22 |
20 |
- |
34/24 |
41/27 |
|
Grade B |
235 |
400-520 |
≥22 |
0 |
27/20 |
34/24 |
41/27 |
|
Grade D |
235 |
400-520 |
≥22 |
-20 |
27/20 |
34/24 |
41/27 |
|
Grade E |
235 |
400-520 |
≥22 |
-40 |
27/20 |
34/24 |
41/27 |
Equivalent Grades Comparison
|
LR Grade |
ABS Grade |
ASTM Equivalent |
EN Equivalent |
CCS Equivalent |
|
LR A |
ABS A |
ASTM A131 A |
S235JR |
CCS A |
|
LR AH36 |
ABS AH36 |
ASTM A131 AH36 |
S355 |
CCS AH36 |
|
LR DH36 |
ABS DH36 |
ASTM A131 DH36 |
S355 |
CCS DH36 |
|
LR EH36 |
ABS EH36 |
ASTM A131 EH36 |
S355 |
CCS EH36 |
The Grades Of LR Standard Shipbuilding Steel Plates We Can Provide Include
|
LR Steel Plate Grade Supplier |
||||
|
General Strength |
LR/A |
LR/B |
LR/D |
LR/E |
|
High Strength |
LR/AH32 |
LR/DH32 |
LR/EH32 |
LR/FH32 |
|
LR/AH36 |
LR/DH36 |
LR/EH36 |
LR/FH36 |
|
|
LR/AH40 |
LR/DH40 |
LR/EH40 |
LR/FH40 |
|
|
Extra Strength |
LR/AH42 |
LR/DH42 |
LR/EH42 |
LR/FH42 |
|
LR/AH46 |
LR/DH46 |
LR/EH46 |
LR/FH46 |
|
|
LR/AH50 |
LR/DH50 |
LR/EH50 |
LR/FH50 |
|
|
LR/AH55 |
LR/DH55 |
LR/EH55 |
LR/FH55 |
|
|
LR/AH62 |
LR/DH62 |
LR/EH62 |
LR/FH62 |
|
|
LR/AH69 |
LR/DH69 |
LR/EH69 |
LR/FH69 |
|
Core Engineering Advantages
Micro-alloyed steel refinement with low sulfur and phosphorus content supports long-term structural integrity in challenging marine and saltwater environments.
Grain-refined TMCP manufacturing enables consistent Charpy V-Notch impact energy down to -40℃ for cold-water and offshore applications.
Low carbon equivalent (Ceq) formulations facilitate direct field welding and lower the risk of heat-affected zone cracking.
Processed through hydraulic leveling systems to achieve narrow thickness tolerances and predictable surface flatness for automated CNC cutting and welding.
Supplied as-rolled, normalized, or thermo-mechanically controlled, with optional Sa 2.5 shot blasting and shop-primer coating upon request.
Quality Assurance & Traceability
Certification Standards: Mill Test Certificates (MTC) supplied in according with EN 10204 3.1 or EN 10204 3.2, signed and stamped by certified Lloyd's Register (LR) surveyors.
Testing Procedures: 100% Ultrasonic Testing (UT) compliant with ASTM A578 Level B/C or SEL 072 (Available upon request or per project spec); optional Z-direction tensile testing (Z15/Z25/Z35) for anti-lamellar tearing resistance.
Full Product Traceability: Original heat numbers, batch codes, and official LR stamps are hard-stamped on every single plate before leaving the factory.
Production & Delivery Capabilities
Manufacturing Process: Steelmaking via LF (Ladle Furnace) + VD (Vacuum Degassing) refining ensures low inclusion levels and high internal purity.
Processing Capabilities: In-house CNC flame and plasma cutting, edge beveling, Sa 2.5 shot blasting, and weldable primer coating (15-25μm DFT).
Packaging & Shipping: Seaworthy export packaging with steel strapping, edge protectors, and moisture protection suitable for containerized or break-bulk shipping.
How We Work: Step-by-Step Order Process
Inquiry & Spec Confirmation: Send us your required grade, dimensions, quantities, and inspection level (3.1 or 3.2 MTC).
Technical Review & Quotation: We verify rolling capabilities, lead time, and provide competitive FOB/CIF pricing.
Production & LR Surveyor Witness: Manufacturing begins; LR surveyors witness sampling, mechanical testing, and UT inspection.
MTC Issuance & Document Review: Draft Mill Test Certificate sent to client for verification prior to vessel loading.
Dispatch & Final Delivery: Port delivery, customs clearance documentation, and original MTC dispatches with shipping documents.
FAQ
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