Application and characteristics of LR grade B shipbuilding steel plate

The LR grade B shipbuilding steel plate is mainly used for making ocean, coastal, inland river ships, deck and so on.

The working environment of LR grade B shipbuilding steel plate is usually not good. The hull must withstand chemical corrosion, electrochemical corrosion of seawater, and corrosion by marine organisms and microorganisms. In addition, the LR grade B steel hull also has larger wave and alternating loads. The complexity of ship processing requires high quality hull structural steel. Good toughness of LR grade B shipbuilding steel plate is the most critical requirement.

In addition, LR grade B shipbuilding steel plate should have high strength, good corrosion resistance, good weldability, good processing performance, good surface quality and so on. Mn/C ratio should be more than 2.5, the carbon equivalent of LR grade B steel is also strictly required by the LR Classification Society.