Mechanical Behaviour of AISI 204 Cu Metastable Low Nickel Austenitic Stainless Steel Sheets at Various Constantly Maintained Elevated Temperatures

Abstract

Mechanical behaviour of AISI 204 austenitic stainless steel is analyzed at 298-873K and also a comparison with that of AISI 304 is done. Room temperature tensile properties are obtained based on an average of properties evaluated on specimens prepared with specimen length axes at 0°, 45° and 90° to sheet rolling direction. Room temperature flow curves are obtained as a function of nickel content and sheet thickness. High temperature tensile properties and flow curves are obtained for 373-873K. YS and UTS are high for low nickel grades. Ductility is high for high nickel grades. Coefficients n and mare same for all grades. YS and UTS decreases with temperature, ductility increases with temperature, and n and m increases with temperature. DSA keeps ductility as maximum at 373K. DSA is more in AISI 204 and hence ductility is reduced in comparison with AISI 304.