LR EH50 steel plate is an extra-high strength, low-temperature tough shipbuilding steel approved by Lloyd's Register (LR) (a classification society) for demanding marine applications, offering high toughness and strength for vessels and offshore structures operating in cold environments, with the '50' indicating its approximate yield strength in MPa (around 350 MPa).
Key Characteristics:
LR (Lloyd's Register): Certification from this marine classification society ensures it meets rigorous standards for marine use.
EH: Denotes Extra High strength for low-temperature service, meaning it retains toughness at cold temperatures.
50: Refers to the minimum yield strength, approximately 50 ksi (around 345-350 MPa), providing superior strength-to-weight.
Toughness: Excellent resistance to brittle fracture, crucial for harsh ocean conditions.
Applications: Ideal for shipbuilding, offshore platforms, and other marine engineering projects requiring robust, cold-resistant materials.
Chemical Composition
LR EH50 extra high Strength Chemical Composition | |||||||
Grade | The Element Max (%) | ||||||
C | Si | Mn | P | S | Al | N | |
LR/EH50 | 0.20 | 0.55 | 1.70 | 0.030 | 0.030 | 0.015 | 0.020 |
Nb | V | Ti | Cu | Cr | Ni | Mo | |
0.02-0.05 | 0.03-0.10 | 0.02 |
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Mechanical Property
LR EH50 extra high strength property | |||||||
Grade |
| Mechanical Property | Charpy V Impact Test | ||||
Thickness | Yield | Tensile | Elongation | Degree | Energy 1 | Energy 2 | |
LR/EH50 | mm | Min Mpa | Mpa | Min % | -40 | J | J |
t≤50 | 500 | 610-770 | 18% | 33 | 50 | ||
50＜t≤70 | 500 | 610-770 | 18% | 33 | 50 | ||
70＜t≤100 | 500 | 610-770 | 18% | 33 | 50 | ||
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal | |||||||
Equivalent steel grade of LR/EH50 | |||||||
DNV | GL | ABS | BV | CCS | NK | KR | RINA |
NV E500 | GL-E500 | AB/EQ51 | BV/E500 | CCS/E500 | K E51 | R E51 | RI/E500 |
