Monel 400 shine jan karfe na nickel Alhoyoy mashahuri a cikin aikace-aikacen babban aiki. Monel 400 yana da kyau acid da alkali juriya, babban ƙarfi, kyakkyawan wuce gona da iri, kyakkyawan aiki mai zafi, da kuma sanyi aiki hardening. Ana iya amfani da shi a yanayin yanayin aikace-aikace daga debe zuwa 1,000¡¡ÃEF (538¡yÃ).