Austenitic stainless steel alloy component, e.g. tube, for use in supercritical water oxidation plants comprises predetermined amounts of chromium and nickel

摘要

An austenitic stainless steel alloy component for use in supercritical water oxidation (SCWO) plants comprises 15-30 wt.% chromium and 20-35 wt.% nickel. The component is intended to be in direct contact with supercritical or near supercritical solution. It may further comprise 0.5-6.0 wt.% copper, 0.01-0.10 wt.% carbon, not >4.0 wt.% molybdenum, 0.2-0.6 wt.% niobium, 0.4-4.0 wt.% tungsten, 0.10-0.30 wt.% nitrogen, 0.5-3 wt.% cobalt, and 0.02-0.10 wt.% titanium. An independent claim is included for use of an austenitic stainless steel alloy comprising 15-30% chromium (Cr) and 20-35% nickel (Ni) in supercritical water oxidation plants.