Difference between CCS DH36 and CCS DH40 steel plate

CCS DH36 is a high-strength shipbuilding steel plate certified by the China Classification Society (CCS) . The "D" grade signifies it is impact tested at -20°C . It has a minimum yield strength of 355 MPa and tensile strength ranging from 490 to 630 MPa . The chemical composition features carbon ≤0.18% and manganese 0.90-1.60%. This grade is typically supplied in hot-rolled, normalized, or TMCP conditions . It is widely used for hull structures, offshore platforms, and marine engineering components.

CCS DH40 is a higher-strength marine steel also certified by CCS with impact toughness tested at -20°C . The "40" denotes a minimum yield strength of 390 MPa . It has a tensile strength ranging from 510 to 660 MPa and minimum elongation of 20% . The chemical composition includes carbon ≤0.18%, manganese 0.90-1.60%, with strict control of phosphorus and sulfur . This grade is typically supplied in normalized, quenched and tempered, or TMCP conditions. It is designed for demanding structural components in shipbuilding and offshore platforms.

Both CCS DH36 and CCS DH40 are CCS-certified high-strength marine steels with impact toughness tested at -20°C, ensuring reliable performance in cold marine environments. Their primary difference lies in strength level: DH36 offers a minimum yield strength of 355 MPa with tensile strength of 490-630 MPa, suitable for general high-strength hull construction , while DH40 provides a higher minimum yield strength of 390 MPa with tensile strength reaching 510-660 MPa, designed for more demanding load-bearing applications . Both grades feature controlled chemical composition with carbon ≤0.18% and maintain good weldability for marine service.

CCS DH36 high Strength Chemical Composition in Tempering and Quenching

CCS DH40 high Strength Max Chemical Composition in Tempering and Quenching

CCS DH36 high strength property in tempering and quenching

CCS DH40 high strength property in tempering and quenching