Difference between BV D460 and BV D500 steel plate

BV D460 is a high-strength shipbuilding steel plate certified by Bureau Veritas (BV) . The "D" grade signifies it is impact tested at -20°C, with minimum impact energy of 31J (transverse) or 46J (longitudinal) . It has a minimum yield strength of 460 MPa and tensile strength ranging from 570 to 720 MPa, with minimum elongation of 17% . The chemical composition is strictly controlled with carbon ≤0.20%, manganese ≤1.70%, and silicon ≤0.55%. This grade is typically supplied in quenched and tempered (QT) or thermomechanical controlled processed (TMCP) conditions. It is widely used for hull construction, offshore platforms, and marine structures operating in cold environments.

BV D500 is an extra-high-strength marine steel also certified by Bureau Veritas (BV) with impact toughness tested at -20°C . The "500" denotes a minimum yield strength of 500 MPa . It has a tensile strength ranging from 610 to 770 MPa and minimum elongation of 16% . Impact energy requirements are 33J (transverse) or 50J (longitudinal) at -20°C . The chemical composition features carbon ≤0.20%, manganese ≤1.70%, with strict control of phosphorus and sulfur . This grade requires advanced processing and is typically supplied in quenched and tempered (QT) or TMCP conditions . It is designed for demanding structural components in shipbuilding, offshore platforms, and marine structures requiring superior strength-to-weight ratio.

Both BV D460 and BV D500 are BV-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: D460 offers a minimum yield strength of 460 MPa with tensile strength of 570-720 MPa, suitable for general high-strength hull construction and offshore structures , while D500 provides a higher minimum yield strength of 500 MPa with tensile strength reaching 610-770 MPa, designed for more demanding load-bearing applications requiring superior strength. Both grades feature controlled chemical composition with carbon ≤0.20% and manganese ≤1.70% , and require advanced processing like QT or TMCP to achieve their mechanical properties while maintaining good weldability for critical marine service.

Chemical Composition

Mechanical Property