Known to be one of the more heat resistant alloys, the Alloy 600 Blind Flange may be used with the intention of closing or shutting off a nozzle or a section of a pipe in a vessel, particularly in elevated temperature settings. Inconel 600 Flanges are made up of a material that has carbon, manganese, silicon, sulfur, copper, iron, nickel and chromium. This is a nickel chromium alloy as it contains 72% nickel and 14% chromium minimum.