Difference between LR EH36 and LR EH62 steel plate

LR EH36 is a high-strength shipbuilding steel plate certified by Lloyd's Register (LR) . The "EH" designation signifies it is impact tested at -40°C, ensuring excellent toughness for cold-environment applications such as Arctic operations . It has a minimum yield strength of 355 MPa and tensile strength ranging from 490 to 620 MPa, with minimum elongation of 21% . The chemical composition is strictly controlled with carbon ≤0.18% and manganese 0.90-1.60% . This grade is widely used for hull construction, offshore platforms, decks, and critical structural components of vessels operating in harsh marine conditions .

LR EH62 is an ultra-high-strength marine steel plate also certified by Lloyd's Register (LR) with impact toughness tested at -40°C . The "62" denotes a minimum yield strength of 620 MPa and tensile strength ranging from 720 to 890 MPa, with minimum elongation of 17% . The chemical composition features carbon ≤0.20% and manganese ≤1.70%, with microalloying elements including Nb, V, Ti, Cu, Cr, Ni, and Mo . This grade requires advanced processing like TMCP or quenching and tempering and is designed for the most critically stressed structural components in modern shipbuilding and offshore engineering, offering an exceptional strength-to-weight ratio .

Both LR EH36 and LR EH62 are LR-certified high-strength marine steels with excellent low-temperature toughness tested at -40°C, ensuring reliable performance in harsh marine environments including Arctic conditions. Their primary difference lies in strength level: EH36 offers a minimum yield strength of 355 MPa with tensile strength of 490-620 MPa, suitable for general high-strength hull construction and offshore structures, while EH62 provides a substantially higher minimum yield strength of 620 MPa with tensile strength reaching 720-890 MPa, designed for the most demanding load-bearing applications requiring maximum weight reduction. Both grades feature controlled chemical composition, but EH62 requires more advanced processing like TMCP or QT to achieve its superior mechanical properties while maintaining good weldability for critical marine service.

Chemical Composition

Mechanical Property