690MPa-grade maritime work steel with excellent hydrogen induced cracking resistance and manufacturing method of 690MPa-grade maritime work steel

The invention discloses 690MPa-grade maritime work steel with excellent hydrogen induced cracking resistance and a manufacturing method of the 690MPa-grade maritime work steel, and belongs to the technical field of steel and iron material preparation. The marine steel provided by the invention comprises the following chemical components in percentage by mass: 0.06-0.11% of C; 0.05%-0.15% of Si; 0.50% to 1.00% of Mn; p: less than or equal to 0.012%; s < = 0.002%; 0.25% to 0.50% of Cu; 0.90% to 1.50% of Ni; 0.45% to 0.95% of Cr; 0.015% to 0.04% of Nb; 0.015% to 0.03% of V; 0.45% to 0.70% of Mo; ti: 0.007% to 0.02%; b: 0.0007% to 0.002%; als: 0.005% to 0.025%; o < = 0.001%; ceq is less than or equal to 0.66%, Pcm is less than or equal to 0.33%, and Bs-Ms is less than or equal to 165 DEG C. The yield strength of the produced steel plate is greater than or equal to 690 MPa, the tensile strength is 770-940 MPa, the section elongation is greater than or equal to 16%, the Z-direction section shrinkage rate is greater