Patent ID: 7081173

Claim:
A tube formed from a super-austenitic stainless alloy with a combination of high corrosion resistance, good general corrosion resistance and good structure stability comprising in weight-percent: Cr 23.0–30.0 Ni 30.0–35.0 Mo 2.0–7.0 Mn 3.0–6.0 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 Ce 0.01–0.06 up to 2.0 of one or more elements of the group Mg, Ca, B, La, Pr, Zr, Ti, and Nd, and the balance being Fe and normally occurring impurities and steel making additions, wherein an elongation of the super-austenitic stainless alloy is about 60 to 72%.