Steel alloy with improved corrosion resistance under high temperature stress and method of making steel strip from this steel alloy

摘要

The invention relates to a steel alloy with improved corrosion resistance under high temperature stress for use temperatures of 300 ° C to 1200 ° C, in particular 800 ° C to 1200 ° C, with the following chemical composition in wt .-%: C: 0.01 to 1.0 ; Al: 3.0 to 12.0; Cr: 2.0 to 15.0; Mn: 5.0 to 30.0; Si: 0.10 to 3.0; Cu: 0.001 to 2.5; Ni: 0.001 to 5.0; S: to 0.010; P: to 0.010; N: 0.001 to 0.050; B: 0.00005 to 0.0250; Mo: 0.01 to 5.0; with: 12 Cr + 2 * Al + 3 * Si 24; and at least one of the elements Ti, V and Nb having the following contents in wt%: Ti: 0.01 to 1.0, V: 0.01 to 1.0, Nb: 0.01 to 1.0, balance Iron with melting impurities and optional addition of at least one of the rare earth elements Y, La, Ce or the elements Hf, Sr and Zr. Furthermore, a method for the production of steel strips made of this steel alloy and advantageous fields of application is given.