Hot-rolled stainless steel sheet having excellent hardness and low-temperature impact properties

A hot-rolled stainless steel sheet having improved hardness and low-temperature impact properties, which is manufactured by steel making, continuous casting and hot rolling, the hot-rolled stainless steel having a longitudinal direction parallel to a rolling direction and a transverse direction perpendicular to the rolling direction, the hot-rolled stainless steel comprising:

• 0.01 to 0.03 wt % of C, 11 to 14 wt % of Cr, 0.1 to 0.2 wt % of Ti, 0.1 to 0.2 wt % of Nb, 0.01 to 0.03 wt % of N, 0.2 to 0.5 wt % of Si, 0.2 to 2.0 wt % of Mn, 1.0 to 2.0 wt % of Ni, and 0.1 to 0.5 wt % of Mo with the reminder of Fe and inevitable impurities,
• wherein a sum of amounts of C and N is 0.02 to 0.05 wt %, and a sum of amounts of Ti and Nb is 0.2 to 0.3 wt %,
• wherein the hot-rolled stainless steel sheet comprises a martensitic matrix structure and a ferrite phase and has a ferrite stability ranging from 5 to 50 as represented by [Equation 1] below,
• FS =−215−619C−16.6Mn+23.7Cr−36.8Ni+42.2Mo+96.2Ti+67Nb−237N+17.2Si [Equation 1]
• where individual components denote amounts of wt % for the corresponding components, and
• wherein the hot-rolled stainless steel sheet has a first impact value of 20 J or more, the first impact value being measured in the transverse direction at a temperature of 0° C., and a second impact value higher than the first impact value by 5 J or more, the second impact value being measured in the longitudinal direction at a temperature of 0° C.