STRUCTURE AND PROPERTIES OF LOW-CARBON NITROGEN-CONTAINING AUSTENITE-FERRITE CORROSION-RESISTANT STEELS

The concentration of elements in existing austenite-ferrite steels var ies in a rather narrow range. This is associated with the necessity of ensuring an optimum austenite/ferrite proportion in the structure (si milar to 40-60%), which is attained by adding ferrite- and austenite-f orming elements in specified amounts. The article concerns the structu re, mechanical properties, and corrosion resistance of low-carbon aust enite-ferrite steels with 18-25% Cr, 2-6% Mo at similar to 7% Ni and 0 .15% N and the choice of the most suitable limiting concentrations of chromium and molybdenum.