EVALUATION OF IRON- AND NICKEL-BASE ALLOYS FOR MEDIUM AND HIGH TEMPERATURE REACTOR APPLICATIONS PART I

摘要

The behavior of austenitic and ferritic stainless steels, ironchromium-aluminum base alloys and nickel-base superalloys, in medium and high temperature simulated reactor environments, is evaluated. Hastelloy alloys X, N, and F are the most resistant of the alloys tested to dry, purified COg up to 1100 C (2012 F) and ambient pressure. AISI 316 SS, 347 SS and 446 SS are affected least by exposure to pure water at 360 C (680 F) and 3200 psi pressure. Some Fe-Cr-Al base alloys rated best in their combined oxidation and corrosion resistance;among these the AISI 406 SS, a commercial alloy commonly used as electrical resistance heating element material, is most promising as an economic fuel cladding and a reactor core component material, especially for gas-cooled reactors to maximum temperatures of 816 C (1500 F).