Hot rolled flat steel product made from a complex-phase steel, - wherein the flat steel product has a hole expansion of at least 60%, a yield strength Rp0.2 of at least 660 MPa, a tensile strength Rm of at least 760 MPa and an elongation at break A80 of at least 10%, - wherein the complex-phase steel consists of (in wt%) C: 0.01 - 0.1 %, Si: 0.1 - 0.45%, Mn: 1 - 2.5 %, Al: 0.005 - 0.05 %, Cr: 0.5 - 1 %, Mo: 0.05 - 0.15%, Nb: 0.045 - 0.1 %, Ti: 0.05 - 0.2 %, N: 0.001 - 0.009 %, P: less than 0.02 %, S: less than 0.005 %, Cu: up to 0.1 % Mg: up to 0.0005 %, O: up to 0.01 %, in each case optionally one element or a plurality of elements from the group "Ni, B, V, Ca, Zr, Ta, W, REM, Co " with the following stipulation Ni: up to 1 %, B: up to 0.005 %, V: up to 0.3 %, Ca: 0.0005 - 0.005 %, Zr, Ta, W: in total up to 2 %, REM: 0.0005 - 0.05 %, Co: up to 1 %, and of iron and manufacture-related unavoidable impurities as the remainder, - wherein the contents of the complex-phase steel of Ti, Nb, N, C and S meet the following conditions: % Ti > 48 / 14 % N + 48 / 32 % S % Nb < 93 / 12 % C + 45 / 14 % N + 45 / 32 % S wherein %Ti: respective Ti content, %Nb: respective Nb content, %N: respective N content, %C: respective C content, %S: respective S content, wherein %S can also be "0", and - wherein the microstructure of the flat steel product consists of at least 80 area% bainite, of less than 15 area% ferrite, of less than 15 area% martensite, of less than 5 area% cementite and of less than 5 vol% retained austenite. - wherein the flat steel product has a hole expansion of at least 60%, a yield strength Rp0.2 of at least 660 MPa, a tensile strength Rm of at least 760 MPa and an elongation at break A80 of at least 10%, - wherein the complex-phase steel consists of (in wt%) C: 0.01 - 0.1 %, Si: 0.1 - 0.45%, Mn: 1 - 2.5 %, Al: 0.005 - 0.05 %, Cr: 0.5 - 1 %, Mo: 0.05 - 0.15%, Nb: 0.045 - 0.1 %, Ti: 0.05 - 0.2 %, N: 0.001 - 0.009 %, P: less than 0.02 %, S: less than 0.005 %, Cu: up to 0.1 % Mg: up to 0.0005 %, O: up to 0.01 %, in each case optionally one element or a plurality of elements from the group "Ni, B, V, Ca, Zr, Ta, W, REM, Co " with the following stipulation Ni: up to 1 %, B: up to 0.005 %, V: up to 0.3 %, Ca: 0.0005 - 0.005 %, Zr, Ta, W: in total up to 2 %, REM: 0.0005 - 0.05 %, Co: up to 1 %, and of iron and manufacture-related unavoidable impurities as the remainder, Ni: up to 1 %, B: up to 0.005 %, V: up to 0.3 %, Ca: 0.0005 - 0.005 %, Zr, Ta, W: in total up to 2 %, REM: 0.0005 - 0.05 %, Co: up to 1 %, - wherein the contents of the complex-phase steel of Ti, Nb, N, C and S meet the following conditions: % Ti > 48 / 14 % N + 48 / 32 % S % Nb < 93 / 12 % C + 45 / 14 % N + 45 / 32 % S wherein %Ti: respective Ti content, %Nb: respective Nb content, %N: respective N content, %C: respective C content, %S: respective S content, wherein %S can also be "0", and wherein %Ti: respective Ti content, %Nb: respective Nb content, %N: respective N content, %C: respective C content, %S: respective S content, wherein %S can also be "0", - wherein the microstructure of the flat steel product consists of at least 80 area% bainite, of less than 15 area% ferrite, of less than 15 area% martensite, of less than 5 area% cementite and of less than 5 vol% retained austenite.