- Materials of Construction Wetted Components (Vessels, Pull Rods, and Grips): Inconel 718, Hastelloy C-276, 316 Stainless Steel, A286 Stainless Steel Non-Wetted Components (External Load Components): 17-4 PH Stainless Steel Sealing: Metal to Metal, PTFE, FFKM, PEEK, EPDM - Designed to work with existing Cortest equipment including Autoclave Systems Stirrers HPHT Circulating Loops