Difference between CCS EH32 and CCS EH40 steel plate

CCS EH32 is a high-strength shipbuilding steel plate certified by the China Classification Society (CCS) . The "E" grade signifies it is impact tested at -40°C, with a minimum impact energy of 46J (transverse), ensuring excellent toughness for cold marine environments . It has a minimum yield strength of 315 MPa and tensile strength ranging from 440 to 590 MPa, with minimum elongation of 22% . The chemical composition is strictly controlled with carbon ≤0.18% and manganese 0.90-1.60% . This grade is widely used for hull structures, offshore platforms, and marine components.

CCS EH40 is an extra-high-strength marine steel plate also certified by CCS, with impact toughness tested at -40°C . The "40" denotes a minimum yield strength of 390 MPa and tensile strength ranging from 510 to 660 MPa, with minimum elongation of 20% . The chemical composition features carbon ≤0.18% and manganese 0.90-1.60%, with microalloying elements such as Nb and V for enhanced properties . This grade is designed for demanding structural applications in large vessels, offshore platforms, and marine engineering projects.

Both CCS EH32 and CCS EH40 are CCS-certified high-strength marine steels with excellent low-temperature toughness tested at -40°C, ensuring reliable performance in harsh marine environments . 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 EH40 provides a higher minimum yield strength of 390 MPa with tensile strength reaching 510-660 MPa, designed for more demanding load-bearing applications requiring superior strength. Both grades feature controlled chemical composition (carbon ≤0.18%) and maintain good weldability for critical marine service.

CCS EH32 high Strength Max Chemical Composition in Tempering and Quenching

CCS EH40 high Strength Max Chemical Composition in Tempering and Quenching

CCS EH32 high strength property in tempering and quenching

CCS EH40 high strength property in tempering and quenching