I-UNS NO8904, evame ukubizwa ngokuthi 904L, iyinsimbi engagqwali ephansi ye-carbon high alloy austenitic esetshenziswa kakhulu ezinhlelweni lapho izakhiwo zokugqwala ze-AISI 316L ne-AISI 317L zinganele. I-904L inikeza ukumelana okuhle kokugqwala kokucindezeleka kwe-chloride, ukumelana nomgodi, nokumelana nokugqwala okujwayelekile okungaphezu kuka-316L kanye no-317L we-molybdenum ethuthukisiwe izinsimbi ezingenasici.