ʻO kekahi o nā mea hao keleawe ikaika kiʻekiʻe loa i loaʻa ma ka mākeke i kēia lā he beryllium copper, ʻike ʻia hoʻi he puna keleawe a i ʻole beryllium bronze. ʻO nā māka pāʻoihana o ka beryllium copper he 0.4 a 2.0 pakeneka beryllium. ʻO ka lakio liʻiliʻi o ka beryllium i ke keleawe e hana i kahi ʻohana o nā ʻāpana keleawe kiʻekiʻe me ka ikaika e like me ke kila kila. ʻO ka mua o nā ʻohana ʻelua, ʻo C17200 a me C17300, he ikaika kiʻekiʻe me ka conductivity haʻahaʻa, aʻo ka ʻohana ʻelua, C17500 a me C17510, hāʻawi i ka conductivity kiʻekiʻe me ka ikaika haʻahaʻa. ʻO nā hiʻohiʻona kumu o kēia mau alloys ko lākou pane maikaʻi loa i ka mālama ʻana i ka ua-hoʻopaʻapaʻa, ka maikaʻi o ka thermal conductivity, a me ke kūʻē ʻana i ka hoʻomaha hoʻomaha.