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Differences Between DNV Grade AH32 and DH32 and EH32

DNV Grades AH32, DH32, and EH32 all belong to Grade 32 high-strength shipbuilding steel plates (yield strength ≥315 MPa). They differ in mechanical properties, chemical composition, delivery conditions, manufacturing processes, and application scenarios. The key distinction among them is the progressive improvement in low-temperature impact toughness: A → D → E, with impact test temperatures of 0°C → -20°C → -40°C, respectively. As low-temperature toughness improves, so does the cost.