The invention relates to the use of an alloy having the composition (in mass per cent) C max. 0.02%, S max. 0.01%, N max. 0.03%, Cr 20.0 - 23.0%, Ni 39.0 - 44.0%, Mn 0.4 - < 1.0%, Si 0.1 - < 0.5%, Mo > 4.0 - < 7.0%, Nb max. 0.15%, Cu > 1.5 - < 2.5%, Al 0.05 - < 0.3%, Co max. 0.5%, B 0.001 - < 0.005%, Mg 0.005 - < 0.015%, remainder Fe and impurities resulting from fusion, which is further processed via the molten phase as an alloyed solid in the form of a wire, strip, rod or powder and is used in the oil, gas and chemical industry in wet corrosion applications.