Flat steel product consisting of, in wt. %, C: 0.02 - 0.1%, Mn: 0.1 - 2.5%, Al: 0.02 - 0.1 %, Nb: 0.04 - 0.12%, and optionally consisting of one element or a plurality of elements from the group "Si, Ti, V, Cr, B, Ca, Mo", with the proviso that the Si content is at most 0.25%, the Ti content is at most 0.12%, the V content is at most 0.2%, the Cr content is at most 0.2%, the B content is at most 0.0025%, the Ca content is at most 0.01% and the Mo content is at most 0.3%, and the remainder consists of iron and unavoidable impurities, wherein the impurities include up to 0.05% P, up to 0.03% S, up to 0.01% N, up to 0.2% Ni, and up to 0.15% Cu, wherein the structure of the flat steel product - consists of at least 60% by area of ferrite and/or bainite and the remainder consists of pearlite and carbide precipitates or carbonitride precipitates and at most up to 2% by area of other structural constituents, and - has a grain aspect ratio of 0.2 - 0.7, wherein the proportions of the α-fiber <110> present in the ferrite are formed in parallel with the rolling direction in a proportion of at most 30%, and the proportions of the γ-fiber <111> present in the ferrite are formed in parallel with the sheet normal in a proportion of at most 20%, the grain aspect ratio, the α-fiber and the γ-fiber, measured as specified in the description, and wherein the flat steel product - has a yield strength Re for which Re > RE_BER applies, where Re_BER = 400 + 2243 * % Nb / d 0.15 where %Nb:relevant Nb content of the flat steel product in wt.%, and d: relevant thickness of the flat steel product in mm. and optionally consisting of one element or a plurality of elements from the group "Si, Ti, V, Cr, B, Ca, Mo", with the proviso that the Si content is at most 0.25%, the Ti content is at most 0.12%, the V content is at most 0.2%, the Cr content is at most 0.2%, the B content is at most 0.0025%, the Ca content is at most 0.01% and the Mo content is at most 0.3%, and the remainder consists of iron and unavoidable impurities, wherein the impurities include up to 0.05% P, up to 0.03% S, up to 0.01% N, up to 0.2% Ni, and up to 0.15% Cu, wherein the structure of the flat steel product - consists of at least 60% by area of ferrite and/or bainite and the remainder consists of pearlite and carbide precipitates or carbonitride precipitates and at most up to 2% by area of other structural constituents, and - has a grain aspect ratio of 0.2 - 0.7, - consists of at least 60% by area of ferrite and/or bainite and the remainder consists of pearlite and carbide precipitates or carbonitride precipitates and at most up to 2% by area of other structural constituents, and - has a grain aspect ratio of 0.2 - 0.7, wherein the proportions of the α-fiber <110> present in the ferrite are formed in parallel with the rolling direction in a proportion of at most 30%, and the proportions of the γ-fiber <111> present in the ferrite are formed in parallel with the sheet normal in a proportion of at most 20%, the grain aspect ratio, the α-fiber and the γ-fiber, measured as specified in the description, and wherein the flat steel product - has a yield strength Re for which Re > RE_BER applies, where Re_BER = 400 + 2243 * % Nb / d 0.15 where %Nb:relevant Nb content of the flat steel product in wt.%, and d: relevant thickness of the flat steel product in mm. - has a yield strength Re for which Re > RE_BER applies, where Re_BER = 400 + 2243 * % Nb / d 0.15 where %Nb:relevant Nb content of the flat steel product in wt.%, and d: relevant thickness of the flat steel product in mm. where %Nb:relevant Nb content of the flat steel product in wt.%, and d: relevant thickness of the flat steel product in mm.