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• X52 steel plate surface quality standards that need to be met
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• Reasons for choosing Q690D steel

What is the difference between DNV GL AH32 ship plate and Q345B steel plate

DNV GL AH32 ship plate is high strength shipbuilding steel, Q345B steel plate is ordinary low alloy steel plate. The differences between DNV GL AH32 ship plate and Q345B steel plate are as follows:

1. DNV GL AH32 ship plate and Q345B steel plate are used in different places. The former is for shipbuilding, and the latter is for general steel structure or used as mechanical plate.

DNV GL AH32 ship plate chemical composition:
Carbon (C): ≤ 0.18
Manganese (Mn): 0.70-1.60
Aluminum (Al): ≥ 0.015
Silicon (Si): 0.10-0.50
P: ≤ 0.04
S: ≤ 0.04
Niobium (Nb): 0.015-0.050
Vanadium (V): 0.030-0.100

2. The chemical composition and properties of DNV GL AH32 ship plate and Q345B steel plate are different. DNV GL AH32 ship plate requires high acid and alkaline resistance and corrosion resistance. Because it is necessary to sail at sea. Q345B steel plate has much lower requirements, just strength and toughness.