Difference between BV EH32 and BV EH36 steel plate

BV EH32 is a high-strength shipbuilding steel plate certified by Bureau Veritas (BV) . The "E" grade signifies it is impact tested at -40°C, ensuring reliable performance in cold marine environments . It has a minimum yield strength of 315 MPa (the "32" represents 32 ksi, approximately 315 MPa) and tensile strength ranging from 440 to 590 MPa, with minimum elongation of 22% . The chemical composition features carbon ≤0.18%, manganese 0.90-1.60%, and silicon 0.10-0.50% . This grade requires fine grain treatment and is typically supplied in normalized, TMCP, or quenched and tempered conditions . It is widely used for hull construction and structural components of ships operating in cold regions.

BV EH36 is a higher-strength marine steel also certified by Bureau Veritas (BV) with impact toughness tested at -40°C . The "36" denotes a minimum yield strength of 355 MPa (36 ksi) . It has a tensile strength ranging from 490 to 620 MPa and minimum elongation of 21% . The chemical composition includes carbon ≤0.18%, manganese 0.90-1.60%, and microalloying elements such as Nb, V, and Ti for grain refinement . To enhance corrosion resistance in saltwater environments, BV grade EH36 typically contains copper (0.20-0.35%) . This grade is designed for critical load-bearing components in icebreakers, offshore platforms, and vessels operating in extreme cold conditions down to -40°C.

Both BV EH32 and BV EH36 are BV-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: EH32 offers a minimum yield strength of 315 MPa with tensile strength of 440-590 MPa, suitable for general high-strength hull construction, while EH36 provides a higher minimum yield strength of 355 MPa with tensile strength reaching 490-620 MPa, designed for more demanding load-bearing applications such as icebreakers and critical offshore structures . Both grades feature controlled chemical composition with carbon ≤0.18% and manganese 0.90-1.60%, and require fine grain treatment with microalloying elements to achieve their mechanical properties while maintaining good weldability for marine service . BV EH36 also typically includes copper addition (0.20-0.35%) for enhanced corrosion resistance in saltwater environments.

Chemical Composition

Mechanical Property