Method for producing pipes consisting of a high-alloy steel which are formed by means of internal high pressure, said steel having high cold deformability, having TRIP and/or TWIP properties and having a partially or completely austenitic microstructure with at least 5% residual austenite, comprising the working steps of: - melting a steel melt with the following chemical composition (in wt.%): Cr: 7 to 20 Mn: 2 to 9 Ni: up to 9 C: 0.005 to 0.4 N: 0.002 to 0.3 with the remainder being iron including unavoidable, steel-associated elements, with optional addition by alloying of the following elements (in wt.%): Al: 0 to 3 Si: 0 to 2 Mo: 0.01 to 3 Cu: 0.005 to 4 V: 0 to 2 Nb: 0 to 2 Ti: 0 to 2 Sb: 0 to 0.5 B: 0 to 0.5 Co: 0 to 5 W: 0 to 3 Zr: 0 to 2 Ca: 0 to 0.1 P: 0 to 0.6 S: 0 to 0.2 - producing a pre-strip by means of a horizontal or vertical casting process approximating the final dimensions or producing slabs by means of a horizontal or vertical slab or thin slab casting process, the casting process approximating the final dimensions which is used is horizontal strip casting or vertical strip casting, wherein strip thicknesses of the pre-strip of 1 to 30 mm, advantageously 1 to 20 mm, are produced, - producing a hot strip by hot-rolling the pre-strip with a thickness greater than or equal to 2 mm or by hot-rolling the slab, wherein the cast pre-strip or the slab is hot-rolled, wherein the hot-rolling starting temperature is at least 900 to 1200°C and the end rolling temperature is at least 650°C, - optionally cold-rolling the hot strip or cold-rolling the pre-strip with a thickness less than 2 mm, - moulding the hot strip or cold strip and welding it to form a pipe, and - internal high pressure forming of the pipe by means of an active medium and the active medium has been tempered to 40 to 300°C, preferably to 80 to 240°C. - melting a steel melt with the following chemical composition (in wt.%): Cr: 7 to 20 Mn: 2 to 9 Ni: up to 9 C: 0.005 to 0.4 N: 0.002 to 0.3 with the remainder being iron including unavoidable, steel-associated elements, with optional addition by alloying of the following elements (in wt.%): Al: 0 to 3 Si: 0 to 2 Mo: 0.01 to 3 Cu: 0.005 to 4 V: 0 to 2 Nb: 0 to 2 Ti: 0 to 2 Sb: 0 to 0.5 B: 0 to 0.5 Co: 0 to 5 W: 0 to 3 Zr: 0 to 2 Ca: 0 to 0.1 P: 0 to 0.6 S: 0 to 0.2 Cr: 7 to 20 Mn: 2 to 9 Ni: up to 9 C: 0.005 to 0.4 N: 0.002 to 0.3 Al: 0 to 3 Si: 0 to 2 Mo: 0.01 to 3 Cu: 0.005 to 4 V: 0 to 2 Nb: 0 to 2 Ti: 0 to 2 Sb: 0 to 0.5 B: 0 to 0.5 Co: 0 to 5 W: 0 to 3 Zr: 0 to 2 Ca: 0 to 0.1 P: 0 to 0.6 S: 0 to 0.2 - producing a pre-strip by means of a horizontal or vertical casting process approximating the final dimensions or producing slabs by means of a horizontal or vertical slab or thin slab casting process, the casting process approximating the final dimensions which is used is horizontal strip casting or vertical strip casting, wherein strip thicknesses of the pre-strip of 1 to 30 mm, advantageously 1 to 20 mm, are produced, - producing a hot strip by hot-rolling the pre-strip with a thickness greater than or equal to 2 mm or by hot-rolling the slab, wherein the cast pre-strip or the slab is hot-rolled, wherein the hot-rolling starting temperature is at least 900 to 1200°C and the end rolling temperature is at least 650°C, - optionally cold-rolling the hot strip or cold-rolling the pre-strip with a thickness less than 2 mm, - moulding the hot strip or cold strip and welding it to form a pipe, and - internal high pressure forming of the pipe by means of an active medium and the active medium has been tempered to 40 to 300°C, preferably to 80 to 240°C. <EOS>