Austenitic steel alloy with improved corrosion resistance when exposed to high temperatures

摘要

The invention relates to an austenitic steel alloy. In order to create an austenitic steel alloy with excellent corrosion resistance under high temperature loads of over 600 ° C. up to 800 ° C., the following chemical composition is proposed in% by weight: C: 0.01 to 0.10; Si: 0.75 or less; Mn: max. 2.00; P: 0.03 or less; S: 0.03 or less; Cr: 23 to 27; Ni: 17 to 23; Nb: 0.2 to 0.6; N: 0.15 to 0.35; The remainder is iron with impurities from the melting process. The invention also relates to a tubular body made of this steel alloy, an absorber tube of a solar receiver of a solar power plant made from this tubular body and a solar receiver with this absorber tube.