Method for producing h-shaped steel

A method for producing H-shaped steel, the method comprising:

• a rough rolling step;
• an intermediate rolling step;
• and
• a finish rolling step, wherein:
• a rolling mill that performs the rough rolling step is engraved with a plurality of calibers configured to roll and shape a material to be rolled, the number of the plurality of calibers being five or more;
• shaping in one or a plurality of passes is performed on the material to be rolled in the plurality of calibers;
• a first caliber and a second caliber of the plurality of calibers are formed with projections configured to create splits vertically with respect to a width direction of the material to be rolled to form divided parts at end portions of the material to be rolled;
• a third caliber and subsequent calibers excluding a final caliber of the plurality of calibers are formed with projections configured to come into contact with the splits to sequentially bend the divided parts formed;
• the final caliber of the plurality of calibers is a flat shaping caliber;
• in the second caliber and subsequent calibers excluding the final caliber of the plurality of calibers, reduction is performed in a state where end surfaces of the material to be rolled are in contact with peripheral surfaces of the calibers in shaping in at least one pass or more;
• and
• in at least one pass or more of rolling and shaping in the plurality of calibers, the rolling and shaping is performed with a rolling roll gap for a predetermined section at a rear end portion in a rolling longitudinal direction of the material to be rolled expanded as compared with a rolling roll gap for other than the predetermined section.