Abstract: The present invention relates to a steel for a mold including: on % by mass basis, 0.55%?C?0.70%; 0.30%?Si?0.60%; 0.55%?Mn?1.2%; 5.7%?Cr?6.9%; 1.2%?Mo+W/2?1.6%; 0.55%?V?0.79%; and 0.005%?N?0.1%, with the remainder being Fe and inevitable impurities including, Al?0.020%, Ni?0.20%, S?0.0015%, and Cu?0.10%, and satisfying P1?24 and 4.9?P2?7.3, P1 and P2 being a value obtained based on the following formula (1) and (2), respectively, P1=45?13.6[Si]?7.0([Mo]+[W]/2)?12.9[Ni] (1), P2=7.4[V]+15.8[N]+38.6[Al] (2) in which [M] represents a content of an element M in % by mass basis, and relates to a mold including the steel for a mold.

Abstract: The present invention relates to a steel for a mold including: on % by mass basis, 0.55% ? C ? 0.70%; 0.30% ? Si ? 0.60%; 0.55% ? Mn ? 1.2%; 5.7% ? Cr ? 6.9%; 1.2% ? Mo + W/2 ? 1.6%; 0.55% ? V ? 0.79%; and 0.005% ? N ? 0.1%, with the remainder being Fe and inevitable impurities including, Al ? 0.020%, Ni ? 0.20%, S ? 0.0015%, and Cu ? 0.10%, and satisfying P1 ? 24 and 4.9 ? P2 ? 7.3, P1 and P2 being a value obtained based on the following formula (1) and (2), respectively, P1 = 45 - 13.6[Si] - 7.0([Mo]+[W]/2) - 12.9[Ni] (1), P2 = 7.4[V] + 15.8[N] + 38.6[Al] (2) in which [M] represents a content of an element M in % by mass basis, and relates to a mold including the steel for a mold.