Abstract: A super-austenitic stainless steel alloy with a composition, balanced in such a way that products made from the alloy fulfill high requirements on a combination of high corrosion resistance, especially in inorganic and organic acids and mixtures thereof, good general corrosion resistance, good structure stability as well as improved mechanical properties in combination with good workability, in particular in tubes, especially seamless tubes and seam welded tubes for application in these environments and with following composition, in weight-percent: Cr 23.0–30.0 Ni 25.0–35.0 Mo ?2.0–6.0 Mn ?1.0–6.0 N ??0–0.4 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.0 W ??0–6.0 up to 2.0 of one or more element of the group Mg, Ce, Ca, B, La, Pr, Zr, Ti, Nd, and the balance being Fe and normally occurring impurities and steel making additions.

Abstract: A super-austenitic stainless steel alloy with a composition, balanced in such a way that products made from the alloy fulfill high requirements on a combination of high corrosion resistance, especially in inorganic and organic acids and mixtures thereof, good general corrosion resistance, good structure stability as well as improved mechanical properties in combination with good workability, in particular in tubes, especially seamless tubes and seam welded tubes for application in these environments and with following composition, in weight-percent: 1 Cr 23.0-30.0 Ni 25.0-35.0 Mo  2.0-6.0 Mn  1.0-6.0 N   0-0.4 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.0 W   0-6.