Method for the production of cast steel strip

A method for the production of cast steel strip in a continuous procedure comprises casting a steel melt into a casting gap having longitudinal sides of which are formed by walls that move during the casting process, to form the steel strip, and holding the steel melt, which is present above the casting gap in a melt pool, under an atmosphere containing nitrogen and hydrogen, wherein the hydrogen content of the atmosphere is greater than 0 mol % to 10 mol %, and the Cr, Mo, Nb, Si, Ti, Ni, Mn, C or N contents of the cast steel melt, which are selectively present in each case for adjusting the characteristics of the steel strip, are in each case selected in such a way that for the ratio Creq/Nieq formed from the Cr equivalent Creq and the Ni equivalent Nieq, the following applies:

• Creq/Nieq≧1.7,
• wherein Creq=% Cr+1.37% Mo+2% Nb+1.5% Si+3% Ti,
• Nieq=% Ni+0.31% Mn+22% C+14% N+% Cu,
• % Cr=respective Cr content,
• % Mo=respective Mo content,
• % Nb=respective Nb content,
• % Si=respective Si content,
• % Ti=respective Ti content,
• % Ni=respective Ni content,
• % Mn=respective Mn content,
• % C=respective C content,
• % N=respective N content.