| abstract |
A steel sheet for coal/ore carrier holds that is a ferrite-pearlite steel sheet of specified components, wherein: the microstructure is a structure configured with the ferrite area fraction in the ¼ thickness region being 80-95% and the pearlite area fraction at the ¼ thickness region being 5-20%, the average aspect ratio of the ferrite grains in the ¼ thickness region being 1.0-1.5, the average grain size of the ferrite grains in the ¼ thickness region being 5-20 µm, and the average dislocation density in the ferrite in the ¼ thickness region being 7×1012/m2 or less; in a 1 mm pitch Vickers hardness test, the average Vickers hardness from the steel sheet surface to the ¼ thickness region or from the ¾ thickness region to the back surface is 80-105% of the average Vickers hardness from the ¼ thickness region to the ¾ thickness region; and the maximum Sn concentration in the ½ thickness (sheet thickness) ± 10% range in the sheet thickness direction is 0.01-5.0%. |