When the density (Do) of the inclusions whose major axis exceeds 5 µm observed in the axis position of a section perpendicular to the axial direction of a forged product is made 70 nos/cm2 or below and the radius of the forged product is made R, the ratio of the density (DR) of the inclusions whose major axis exceeds 5 µm observed in the R/3 position from the axis position toward the radial direction and the density Do satisfies an inequality (1) below. 0.5≤DR/DO≤1.50
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机译：当在与锻造产品的轴向垂直的截面的轴线位置上观察到的长轴超过5 µm的夹杂物的密度（Do）为70 nos / cm2以下时，锻造产品的半径为R ，在从轴位置向径向的R / 3位置观察到的长轴超过5μm的夹杂物的密度（DR）的比，且密度Do满足以下的不等式（1）。 0.5≤DR/DO≤1.50
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