对两种精炼工艺生产的厚50 mm及20 mm规格的B钢船板的化学成分、拉伸性能、冲击性能、厚度方向性能及显微组织等进行了对比，并分析了其是否满足船级社的规范要求。结果表明：两种精炼工艺生产B钢船板的各项性能均满足船级社的规范要求，生产无厚度方向性能要求的B钢船板时可使用LATS精炼工艺，生产有厚度方向性能要求的B钢船板时可使用LF+RH精炼工艺。

The chemical compositions, tensile, impact, thickness directional properties and microstructure of the B grade ship plates with thickness 50 mm and 20 mm specifications produced by two refining processes were compared, and whether they meet the requirements of the classification society were analyzed. The results show that the properties of the B grade ship plates produced by the two refining processes meet the requirements of the classification society. LATS refining process was selected when produced the B grade ship plates without thickness direction property requirements, and LF+RH refining process was selected when produced the B grade ship plates with thickness direction property requirements.