Nickel ally 400 me te Monel 400, e mohiotia ana hoki ko te uns N04400, ko te alloy nickel-paramu-paramu e rua-toru-tuatoru me te kotahi-tuatoru pararau. Ko te Nickel alloy 400 e mohiotia ana mo tana whakaeke ki te maha o nga tikanga piripiri, tae atu ki a Alkalis (waikawa), te wai tote, te waikawa hydrofluoric, me te waikawa hupa. Mai i te Monel 400 ko te alloy 400 he whakarewa mahi a te makariri, he nui te uaua, he uaua me te kaha. Na te makariri e mahi ana i te Sold e mahi ana i te Bar Stock, ko te alloy e tika ana ki nga taumata o te ahotea, e whakarereke ana i nga huringa o te microstructure a te alcoy.