Official Answer
Answer
A cikin MRI da na'urorin lantarki masu mahimmanci na sararin samaniya, ana buƙatar kayan da ƙananan ƙarfin maganadisu $ \ mu <1.01$ don hana ɓarna filin. Daidaitaccen ƙarfe na carbon da 400-jerin bakin karfe suna da ferromagnetic kuma basu dace ba. 302/304 bakin karfe sune paramagnetic a cikin yanayin da aka rufe amma zai iya zama ɗan ƙaramin maganadisu lokacin sanyi-aiki cikin maɓuɓɓugan ruwa. Don takamaiman aikace-aikacen da ba na maganadisu ba, ana amfani da Phosphor Bronze (ASTM B159) ko Monel K-500 (UNS N05500). Bronze Phosphor yana ba da kyakkyawan aiki amma ƙananan ƙarfi, yayin da Monel K-500 yana ba da ƙarfi mai ƙarfi da ingantaccen juriya na lalata yayin da ya rage mara ƙarfi ko da bayan raguwar sanyi mai nauyi.
