Steel for induction hardening, roughly shaped material for induction hardening, producing method thereof, and induction hardening steel part

A roughly shaped material for an induction hardening comprising, by mass %,

• C:
• more than 0.75% to 1.20%,
• Si:
• 0.002 to 3.00%,
• Mn:
• 0.20 to 2.00%,
• S:
• 0.002 to 0.100%,
• Al:
• more than 0.050% to 3.00%,
• P:
• limited to 0.050% or less,
• N:
• limited to 0.0200% or less,
• O:
• limited to 0.0030% or less,
• at least one of
• V:
• 0.005 to less than 0.20%,
• Nb:
• 0.005 to 0.10%, and
• Ti:
• 0.005 to 0.10%, and
• the balance of iron and unavoidable impurities,
• wherein an Al content and a N content, by mass %, satisfy Al−(27/14)×N>0.050%, and wherein the roughly shaped material has a number of graphite grains with an average grain size of 0.5 μm or more, which is included in the roughly shaped material for induction hardening is 40 pieces/mm2 or less.