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Differences Between DNV Grade AH32 and DNV Grade AH36 Shipbuilding Steel Plates
DNV Grade AH32 and AH36 are both DNV (Det Norske Veritas)-certified Grade A high-strength marine structural steel plates; their main difference lies in their strength grades. DNV Grade AH32 shipbuilding steel plates have a minimum yield strength of 315 MPa, while DNV Grade AH36 shipbuilding steel plates have a minimum yield strength of 355 MPa. In comparison, AH36 offers a higher strength margin and is more suitable for the construction of large vessels and critical structural components subjected to high loads.
Welding Process for DNV Grade AH36 Shipbuilding Steel Plates
DNV Grade AH36 shipbuilding steel plates are high-strength hull structural steel plates certified by Det Norske Veritas (DNV), with a yield strength of ≥355 MPa, a tensile strength of 490–630 MPa, and an impact energy at 0°C of ≥34 J. This steel grade features a low-carbon, microalloyed design (C ≤ 0.18%) with grain-refining elements such as V, Ti, and Nb. It is primarily rolled using the TMCP (Thermomechanical Control Process), resulting in a low carbon equivalent, excellent overall weldability, and low susceptibility to cold cracking. It is a mainstream steel grade for shipbuilding and offshore platform structures.
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