Steel material having excellent hydrogen induced cracking resistance, and manufacturing method therefor

A steel material having excellent hydrogen induced cracking resistance, comprising:

• by wt %, 0.10 to 0.25% of carbon (C), 0.05 to 0.50% of silicon (Si), 1.0 to 2.0% of manganese (Mn), 0.005 to 0.1% of aluminum (Al), 0.010% or less of phosphorus (P), 0.0015% or less of sulfur(S), 0.001 to 0.03% of niobium (Nb), 0.001 to 0.03% of vanadium (V), 0.001 to 0.03% of titanium (Ti), 0.01 to 0.20% of chromium (Cr), 0.01 to 0.15% of molybdenum (Mo), 0.01 to 0.50% of copper (Cu), 0.05 to 0.50% of nickel (Ni), 0.0005 to 0.0040% of calcium (Ca), a balance of Fe, and other inevitable impurities,
• wherein a length ratio of a short side portion to a long side portion (short side portion/long side portion) of a void formed at a central portion of the steel material is 0.7 or more, and
• wherein the steel material has a tensile strength of 515 MPa or more, and a Charpy impact absorption energy at −50° C. of 239 J or more.