Does high-strength ship plate or Q345B carbon steel plate has higher resistance to pressure
Which has higher resistance to pressure, the high-strength ship plate or Q345B carbon steel plate? It depends on the thickness specification of Q345B carbon steel plate. There are many steel grades for high-strength ship plates. 32kg (yield strength of 315mpa) and above are all high-strength ship plates, which can be divided into ordinary strength ship plates (yield strength of 235mpa), high-strength ship plates (yield strength of 315mpa, 355MPa and 390mpa) and ultra-high strength ship plates (yield strength of 420MPa, 460Mpa, 500MPa, 550MPa, 620MPa and 690mpa).
The yield strength of Q345B carbon steel plate is 345 MPa, and with the increase of the thickness of Q345B carbon steel plate, the yield strength requirement decreases, that is to say, thickness effect. There is no thickness effect at all levels of ship plates. Therefore, the yield strength of 36 kg (yield strength of 355 MPa) and above is higher than that of Q345B carbon steel plate.