AH36 high-strength marine steel plate and smelting production method thereof

The invention provides an AH36 high-strength marine steel plate which comprises the following chemical components in percentage by mass: more than or equal to 0.06 wt% and less than or equal to 0.09 wt% of C, more than or equal to 0.15 wt% and less than or equal to 0.30 wt% of Si, more than or equal to 0.90 wt% and less than or equal to 1.10 wt% of Mn, less than or equal to 0.025 wt% of P, less than or equal to 0.005 wt% of S, more than or equal to 0.018 wt% and less than or equal to 0.045 wt% of Als, less than or equal to 0.030 wt% of Nb, less than or equal to 0.020 wt% of Ti, more than or equal to 0.007 wt% and less than or equal to 0.010 wt% of N, more than or equal to 0.03 wt% and less than or equal to 0.040 wt% of The AH36 high-strength marine steel plate is good in welding performance, high in performance stability and high in flatness. According to the smelting production method, only the LF refining treatment procedure is adopted, and the production cost is greatly reduced while the performance of the