EH40 crack arrest steel plate for container ship and manufacturing method of EH40 crack arrest steel plate

The invention relates to an EH40 crack arrest steel plate for a container ship and a manufacturing method of the EH40 crack arrest steel plate, and belongs to the field of ferrous metallurgy. The steel comprises the following chemical components in percentage by mass: 0.03%-0.06% of C, 0.15%-0.30% of Si, 1.10%-1.30% of Mn, less than or equal to 0.0080% of P, less than or equal to 0.0030% of S, 0.010%-0.020% of Nb, 0.035%-0.055% of V, 0.008%-0.020% of Ti, 0.45%-0.65% of Ni, 0.10%-0.30% of Cu, 0.0005%-0.0020% of Ca, less than or equal to 0.00015% of H, less than or equal to 0.42% of Ceq and the balance of Fe and inevitable impurity elements. The yield strength ranges from 409 MPa to 440 MPa, the tensile strength ranges from 595 MPa to 625 MPa, and the yield ratio ranges from 0.84 to 0.88; the longitudinal impact toughness value at-60 DEG C is not less than 250J; in an oscillographic impact test, the absorption energy E4 after crack arrest/instability expansion of the crack arrest/instability expansion power E3