07MnNiMoDR steel plate for spherical tank and production process

The invention discloses a 07MnNiMoDR steel plate for a spherical tank and a production process, and relates to the technical field of steel and iron smelting. The 07MnNiMoDR steel plate for the spherical tank is prepared from the chemical compositions in percentage by mass: 0.05%-0.09% of C, 0.10%-0.30% of Si, 1.20%-1.60% of Mn, less than or equal to 0.012% of P, less than or equal to 0.0010% of S, 0.35%-0.60% of Ni, 0.020%-0.040% of Nb, 0.10%-0.30% of Mo, less than or equal to 0.005% of Ti, 0.0010%-0.0040% of Ca, 0.010%-0.040% of Al, 0.38%-0.43% of Ceq, and the balance of Fe and unavoidable impurities. The composition uses a small amount of Nb and Ni alloy elements. The production process adopts an offline quenching and tempering process. The steel plate produced meets the need for high product performance and NDT requirements. 本发明公开了一种球罐用07MnNiMoDR钢板及生产工艺，涉及钢铁冶炼技术领域，其化学成分及质量百分如下：C：0.05%～0.09%，Si：0.10%～0.30%，Mn：1.20%～1.60%，P≤0.012%，S≤0.0010%，Ni:0.35%～0.60%，Nb：0.020%～0.040%，Mo:0.10%～0.30%，Ti≤0.005%，Ca：0.0010%