C17200 Copper (CDA 172)

C17200 kuma ana kiranta da Alloy 25 kuma shine mafi yawan amfani da beryllium jan ƙarfe na ƙarfe kuma sananne ne don nuna ƙarfi da taurin mafi girma idan aka kwatanta da kayan haɗin gwal na kasuwanci. Ƙarfinsa da taurinsa suna kama da na ƙarfe. C17200 jan ƙarfe na ƙarshe na tensile da kaddarorin taurin Rockwell a cikin mafi girman yanayin tsufa suna cikin kewayon 200 ksi da RC 45 bi da bi (mafi ƙarancin wutar lantarki 22% IACS).