321 insimbi engagqwali, eyaziwa nangokuthi yi-UNS S32100 nebanga le-17% kuya ku-19% i-chromium, ama-silfickes angu-1%, ama-pulfur, ama-5 x (c + n) .70%. Mayelana nokumelana nokugqwala, insimbi engagqwali ilingana nebanga le-304 esimweni esivelele futhi liphezulu uma uhlelo lubandakanya insiza ku-797¡Ã♥. I-321 Insimbi Engagqwali ihlanganisa amandla aphezulu, ukumelana nokuqina nokuqina kwesigaba ngokumelana nokuqina okulandelayo kwamanzi.
I-Stainless, Duplex, Alloy ekhethekile, Info, Monel, Monel, Hastelloy, Nitronic & Carbon Insimbi - I-Zhengzhou Huitong Pipeline Equipment Co, Ltd.
Insimbi engenasici kumele ibe okungenani i-10,5% chromium. Kuya ngebanga, kungaqukatha amazinga aphezulu aphezulu we-chromium, kanye nezithako ezengeziwe zokuqalisa njenge-molybdenum, nickel, titanium, i-aluminium, ithusi, i-nitrogen, phosphous noma i-pelenium.