A metal sheet having a bcc structure and satisfying the following condition (a1) or (b1) at a surface thereof: (a1) an area fraction of crystal grains having a crystal orientation divergent by 20° or more from a plane parallel to a surface of the metal sheet and by 20° or more from a plane is from 0.25 to 0.35, and an average crystal grain size is less than 16 μm; or (b1) an area fraction of crystal grains having a crystal orientation divergent by 20° or more from a plane parallel to a surface of the metal sheet and by 20° or more from a plane is from 0.15 to 0.30, and an average crystal grain size is 16 μm or more; wherein the metal sheet is a steel sheet; and wherein the steel sheet is a ferrite-based steel sheet having a chemical composition of: C: from 0.0040% by mass to 0.0100% by mass; Si: from 0% by mass to 1.0% by mass; Mn: from 0.90% by mass to 2.00% by mass; P: from 0.050% by mass to 0.200% by mass; S: from 0% by mass to 0.010% by mass; Al: from 0.00050% to 0.10% by mass; N: from 0 % by mass to 0.0040% by mass; Ti: from 0.0010% by mass to 0.10% by mass; Nb: from 0.0010% by mass to 0.10% by mass; B: from 0% by mass to 0.003% by mass; a total of one or more of Cu or Sn: from 0% by mass to 0.10% by mass; a total of one or more of Ni, Ca, Mg, Y, As, Sb, Pb, or REM: from 0% by mass to 0.10% by mass; and a balance: Fe and impurities, wherein a value of F1 as defined in the following Formula is from 0.5 to 1.0: F 1 = C / 12 + N / 14 + S / 32 / Ti / 48 + Nb / 93 ; wherein the area fraction of the crystal grains and the average crystal size are measured as disclosed in the description. (a1) an area fraction of crystal grains having a crystal orientation divergent by 20° or more from a plane parallel to a surface of the metal sheet and by 20° or more from a plane is from 0.25 to 0.35, and an average crystal grain size is less than 16 μm; or (b1) an area fraction of crystal grains having a crystal orientation divergent by 20° or more from a plane parallel to a surface of the metal sheet and by 20° or more from a plane is from 0.15 to 0.30, and an average crystal grain size is 16 μm or more; wherein the metal sheet is a steel sheet; and wherein the steel sheet is a ferrite-based steel sheet having a chemical composition of: C: from 0.0040% by mass to 0.0100% by mass; Si: from 0% by mass to 1.0% by mass; Mn: from 0.90% by mass to 2.00% by mass; P: from 0.050% by mass to 0.200% by mass; S: from 0% by mass to 0.010% by mass; Al: from 0.00050% to 0.10% by mass; N: from 0 % by mass to 0.0040% by mass; Ti: from 0.0010% by mass to 0.10% by mass; Nb: from 0.0010% by mass to 0.10% by mass; B: from 0% by mass to 0.003% by mass; a total of one or more of Cu or Sn: from 0% by mass to 0.10% by mass; a total of one or more of Ni, Ca, Mg, Y, As, Sb, Pb, or REM: from 0% by mass to 0.10% by mass; and a balance: Fe and impurities, wherein a value of F1 as defined in the following Formula is from 0.5 to 1.0: F 1 = C / 12 + N / 14 + S / 32 / Ti / 48 + Nb / 93 ; wherein the area fraction of the crystal grains and the average crystal size are measured as disclosed in the description. C: from 0.0040% by mass to 0.0100% by mass; Si: from 0% by mass to 1.0% by mass; Mn: from 0.90% by mass to 2.00% by mass; P: from 0.050% by mass to 0.200% by mass; S: from 0% by mass to 0.010% by mass; Al: from 0.00050% to 0.10% by mass; N: from 0 % by mass to 0.0040% by mass; Ti: from 0.0010% by mass to 0.10% by mass; Nb: from 0.0010% by mass to 0.10% by mass; B: from 0% by mass to 0.003% by mass; a total of one or more of Cu or Sn: from 0% by mass to 0.10% by mass; a total of one or more of Ni, Ca, Mg, Y, As, Sb, Pb, or REM: from 0% by mass to 0.10% by mass; and a balance: Fe and impurities, wherein a value of F1 as defined in the following Formula is from 0.5 to 1.0: F 1 = C / 12 + N / 14 + S / 32 / Ti / 48 + Nb / 93 ; wherein the area fraction of the crystal grains and the average crystal size are measured as disclosed in the description. <EOS>