Monel K500 (Aloy K500), uroy (qq-n-286), nckel-jan ƙarfe-tagulla wanda ya haɗu da juriya na monel alloy 400 tare da mafi girman ƙarfi (sama da 2x maƙarƙashiya) da ƙarfi. Hakanan yana da ƙarancin rauni kuma yana da ban mamaki zuwa yanayin zafi kamar -150¡arka (-101¡yÃ). Wannan Alloy yana nuna halayen masu rikitarwar grades kamar susan 400 amma tare da haɓaka da ƙarfi bayan hazo hardening. Koyaya, ana iya ƙara ƙarfafa ta da sanyi aiki kafin hazo da hardening.