Method for producing H-shaped steel

A method for producing H-shaped steel from a raw material, the method comprising:

• a rough rolling step;
• an intermediate rolling step;
• and
• a finish rolling step,
• wherein:
• the rough rolling step comprises:
• an edging rolling step of rolling and shaping a raw material into a predetermined shape including a web part;
• and
• a flat rolling step of rotating the material of the predetermined shape 90° or 270° after completion of the edging rolling step and forming a raised part at a middle of the web part of the material of the predetermined shape using upper and lower caliber rolls having a raised part forming caliber with recessed parts, each of the recessed parts being provided at respective middle parts along a respective roll barrel of the upper and lower caliber rolls;
• and
• a side surface inclination angle α formed, during the flat rolling step, between a direction perpendicular to a rolling pitch line and a side surface of the formed raised part as viewed from a rolling direction is set to 30° or more,
• wherein the flat rolling step further includes reducing the raised part by rolling and shaping the web part flat with a raised part eliminating caliber, and
• wherein the flat rolling step further includes performing widening rolling of the web part using one or a plurality of widening calibers after the web part is rolled and shaped flat.