A rolled steel bar for hot forging consisting, by mass percent, of C: 0.25-0.50%, Si: 0.40-1.0%, Mn: 1.0-1.6%, S: 0.005-0.035%, Al: 0.005-0.050%, V: 0.10-0.30%, and N: 0.005-0.030%, and the balance of Fe and impurities, the contents of P and O in the impur...

[Problem to be solved] To provide a novel method for efficiently manufacturing a press product that includes, in an integrated manner, a flat part (a vane part) and a rod part (a shaft part) having a diameter greater than the thickness of the flat part. [S...