ABS AH32, DNV AH32, LR AH32 and CCS AH32: What Is the Difference?

ABS AH32, DNV AH32, LR AH32, and CCS AH32 all refer to AH32 shipbuilding steel supplied under the requirements of different classification societies. For buyers, the main difference is generally which classification society approves or certifies the material, rather than simply the name “AH32.”

ABS AH32 is associated with projects classified by the American Bureau of Shipping. DNV AH32 is supplied according to DNV requirements, while LR AH32 is associated with Lloyd’s Register. CCS AH32 is certified according to China Classification Society requirements. Other recognized societies, including BV and RINA, may also approve AH32 for applicable marine projects.

The basic AH32 designation identifies the steel grade and strength category, but the applicable classification rules determine requirements for production, testing, inspection, certification, and traceability. Therefore, buyers should not automatically assume that a certificate from one society can be substituted for another.

For example, if a vessel is being built under DNV classification, the buyer may need DNV-approved material rather than simply purchasing generic AH32 plate. The final requirement should be confirmed from the vessel specification and classification documentation.

When comparing quotations, buyers should therefore look beyond the price per ton. Check the classification society, certificate type, plate dimensions, approved manufacturer, inspection requirements, MTC documentation, and traceability.

A clear RFQ should specify the required classification society from the beginning. This allows the steel supplier to confirm whether the requested AH32 material is available from stock or needs to be produced and certified for the specific project.