321 Amantongomane e-Hex angenasici asetshenziswa ezinhlotsheni ezihlukile zohlelo lokusebenza. Izinto ezibonakalayo ziyinsimbi ezinzile ze-autenitic ezingenacala. Ngaleso sikhathi, ama-ans angenazinsimbi ama-unx ama-s32100 hex bolts ayi-alloy e-auntenitic ehlokiwe, efana ne-alloy 304, kepha okungenani i-titanium ephindwe kahlanu kunekhabhoni. Okuqukethwe kuqukethe i-chromium engu-17%, i-9% nickel ne-titanium futhi zizinzile nge-carbon, iron, manganese, nitrogen, phosphorus, isibabule kanye ne-silcon.