N04400 ndi alloy wa cuckele-mkuwa wokhala makamaka ndi gawo lachitatu la nickel ndi lachitatu. Alloy N04400 amadziwika chifukwa chokana kusiyanasiyana, kuphatikizapo alkalis (kapena zinthu ngati asidi), brine, hydrofluoric acid, ndi sulufuric acid. Ubwino wina wogwiritsa ntchito alloy ndi ukulu komanso mphamvu yayikulu pakutentha kwakukulu; Itha kutsukidwanso kuti ndikhale maginito ngati mukufuna.
Kwa mapulogalamu ogwiritsa ntchito pepala amafuna magiredi a Anoy omwe alibe zokwanira kuwonongeka. Kutengera ndi zikhalidwe 22%, ali ndi austetitic: microptuction microstructuctunce yomwe imapereka mphamvu zazikulu, kukana ndi kuchuluka kwa mtengo wake.
Alloy 20 (alroy 20) ndi Aluto wochokera ku chitsulo chokhazikitsidwa kuti athe kukana sulfurosic acid kuvunda. Ili ndi kukana kwabwino kwa sulfuric acid kuvunda; Ili ndi kukana kwamphamvu ku phosphoroc acid, nitric acid ndi chloride madera, chloride kupsinjika kukhetsa, kuponderezana ndi kuwonongeka. Chifukwa chake, alloy 20 ali ndi dzina la anti-Corrosion alloy; Ili ndi ntchito zingapo: monga: mankhwala, chakudya, mankhwala, kupanga mphamvu ndi mafakitale kumagwiritsa ntchito. Chifukwa chokana kuponyera chipongwe ndi chloride chiwonongeko, kupsinjika kuwononga mavuto, etc. 20 amakonda 20 nthawi zambiri amagwiritsidwa ntchito.