A steel material comprising: 0.25 mass% ≤ C ≤ 0.37 mass%; 0.08 mass% ≤ V ≤ 0.28 mass%; 6.70 mass% ≤ Mn + Cr ≤ 7.40 mass%; Mn/Cr ≤ 0.150; Mn ≥ 0.60 mass%; Cr ≤ 6.60 mass%; Cu + Ni ≤ 0.84 mass%; 0.40 mass% ≤ Si ≤ 0.90 mass%; 0.60 mass% ≤ Mo ≤ 2.00 mass%; 0.001 mass% ≤ Al ≤ 0.080 mass%; and 0.003 mass% ≤ N ≤ 0.040 mass%, optionally further comprising: at least one Group selected from the group consisting of Group A, Group B, Group C, and Group D, wherein Group A is at least one element selected from the group consisting of 0.30 mass% < W ≤ 2.00 mass%, and 0.30 mass% < Co ≤ 1.00 mass%, Group B is 0.0002 mass% < B ≤ 0.0080 mass%, Group C is at least one element selected from the group consisting of 0.006 mass% < S ≤ 0.180 mass%, 0.0005 mass% < Ca ≤ 0.0500 mass%, 0.03 mass% < Se ≤ 0.50 mass%, 0.005 mass% < Te ≤ 0.100 mass%, 0.01 mass% < Bi ≤ 0.50 mass%, and 0.03 mass% < Pb ≤ 0.50 mass%, and Group D is at least one element selected from the group consisting of 0.004 mass% < Nb ≤ 0.100 mass%, 0.004 mass% < Ta ≤ 0.100 mass%, 0.004 mass% < Ti ≤ 0.100 mass%, and 0.004 mass% < Zr ≤ 0.100 mass% with the balance being Fe and unavoidable impurities, wherein elements that can be included as impurities in the steel material and contents thereof are P ≤ 0.03 mass%, S ≤ 0.006 mass%, O ≤ 0.006 mass%, W ≤ 0.30 mass%, Co ≤ 0.30 mass%, B ≤ 0.0002 mass%, Nb ≤ 0.004 mass%, Ta ≤ 0.004 mass%, Ti ≤ 0.004 mass%, Zr ≤ 0.004 mass%, Ca ≤ 0.0005 mass%, Se ≤ 0.03 mass%, Te ≤ 0.005 mass%, Bi ≤ 0.01 mass%, Pb ≤ 0.03 mass%, and/or Mg ≤ 0.02 mass%. 0.25 mass% ≤ C ≤ 0.37 mass%; 0.08 mass% ≤ V ≤ 0.28 mass%; 6.70 mass% ≤ Mn + Cr ≤ 7.40 mass%; Mn/Cr ≤ 0.150; Mn ≥ 0.60 mass%; Cr ≤ 6.60 mass%; Cu + Ni ≤ 0.84 mass%; 0.40 mass% ≤ Si ≤ 0.90 mass%; 0.60 mass% ≤ Mo ≤ 2.00 mass%; 0.001 mass% ≤ Al ≤ 0.080 mass%; and 0.003 mass% ≤ N ≤ 0.040 mass%, optionally further comprising: at least one Group selected from the group consisting of Group A, Group B, Group C, and Group D, wherein Group A is at least one element selected from the group consisting of 0.30 mass% < W ≤ 2.00 mass%, and 0.30 mass% < Co ≤ 1.00 mass%, Group B is 0.0002 mass% < B ≤ 0.0080 mass%, Group C is at least one element selected from the group consisting of 0.006 mass% < S ≤ 0.180 mass%, 0.0005 mass% < Ca ≤ 0.0500 mass%, 0.03 mass% < Se ≤ 0.50 mass%, 0.005 mass% < Te ≤ 0.100 mass%, 0.01 mass% < Bi ≤ 0.50 mass%, and 0.03 mass% < Pb ≤ 0.50 mass%, and Group D is at least one element selected from the group consisting of 0.004 mass% < Nb ≤ 0.100 mass%, 0.004 mass% < Ta ≤ 0.100 mass%, 0.004 mass% < Ti ≤ 0.100 mass%, and 0.004 mass% < Zr ≤ 0.100 mass% with the balance being Fe and unavoidable impurities, wherein elements that can be included as impurities in the steel material and contents thereof are P ≤ 0.03 mass%, S ≤ 0.006 mass%, O ≤ 0.006 mass%, W ≤ 0.30 mass%, Co ≤ 0.30 mass%, B ≤ 0.0002 mass%, Nb ≤ 0.004 mass%, Ta ≤ 0.004 mass%, Ti ≤ 0.004 mass%, Zr ≤ 0.004 mass%, Ca ≤ 0.0005 mass%, Se ≤ 0.03 mass%, Te ≤ 0.005 mass%, Bi ≤ 0.01 mass%, Pb ≤ 0.03 mass%, and/or Mg ≤ 0.02 mass%. at least one Group selected from the group consisting of Group A, Group B, Group C, and Group D, wherein Group A is at least one element selected from the group consisting of 0.30 mass% < W ≤ 2.00 mass%, and 0.30 mass% < Co ≤ 1.00 mass%, Group B is 0.0002 mass% < B ≤ 0.0080 mass%, Group C is at least one element selected from the group consisting of 0.006 mass% < S ≤ 0.180 mass%, 0.0005 mass% < Ca ≤ 0.0500 mass%, 0.03 mass% < Se ≤ 0.50 mass%, 0.005 mass% < Te ≤ 0.100 mass%, 0.01 mass% < Bi ≤ 0.50 mass%, and 0.03 mass% < Pb ≤ 0.50 mass%, and Group D is at least one element selected from the group consisting of 0.004 mass% < Nb ≤ 0.100 mass%, 0.004 mass% < Ta ≤ 0.100 mass%, 0.004 mass% < Ti ≤ 0.100 mass%, and 0.004 mass% < Zr ≤ 0.100 mass% with the balance being Fe and unavoidable impurities, wherein elements that can be included as impurities in the steel material and contents thereof are P ≤ 0.03 mass%, S ≤ 0.006 mass%, O ≤ 0.006 mass%, W ≤ 0.30 mass%, Co ≤ 0.30 mass%, B ≤ 0.0002 mass%, Nb ≤ 0.004 mass%, Ta ≤ 0.004 mass%, Ti ≤ 0.004 mass%, Zr ≤ 0.004 mass%, Ca ≤ 0.0005 mass%, Se ≤ 0.03 mass%, Te ≤ 0.005 mass%, Bi ≤ 0.01 mass%, Pb ≤ 0.03 mass%, and/or Mg ≤ 0.02 mass%.