ʻO ke kāʻei Cupronickel kahi hui keleawe me ka nickel ka mea hoʻohui nui. ʻO nā'āpana keleawe-nickel e pili ana i nā'āpana keleawe-nickel me nā meaʻekolu e like me ka zinc, manganese, aluminika, a me nā mea'ē aʻe i kapaʻia he zinc-nickel-nickel strips, manganese-nickel-nickel strips, a me nā'āpana alumini-nickel-nickel e like me ia. Copper-nickel alloy he maikaʻi ka corrosion resistance, medium strength, plasticity kiʻekiʻe, a hiki ke hana ʻia e ke kaomi wela a me ke anu.
Hoʻokaʻawale ʻia nā ʻāpana keleawe keʻokeʻo i ʻelima mau ʻāpana: nā ʻāpana keleawe keʻokeʻo maʻamau, nā ʻāpana keleawe keʻokeʻo hao, nā ʻāpana keleawe keʻokeʻo manganese, nā ʻāpana keleawe keʻokeʻo zinc a me nā ʻāpana keleawe keʻokeʻo alumini.
Loaʻa i nā ʻāpana keleawe keʻokeʻo maʻamau ʻehā mau māka e like me B0.6, B5, B19, a me B30. ʻO nā mea maʻamau ʻo B19 a me B30, a ʻoi aku ka nui o nā māka ma ka moʻo maʻamau ʻAmelika. ʻO ka ʻāpana keleawe keʻokeʻo he ʻoluʻolu paʻa mau i hana ʻia e Cu a me Ni, me ka lattice cubic i waena o ke alo, e like me ka hōʻike ʻana ma ke Kiʻi 1-18. Ke emi ka mahana ma mua o 322 degere, ʻo ke kiʻikuhi keleawe-nickel phase he ākea ākea ka ʻāina wela o ka decomposition metastable, e hoʻohui ana i nā mea ʻekolu e like me Fe, Cr, Sn, Ti, Co, Si, Al i ka hui Cu-Ni. Etc., hiki ke hoʻololi i ka haku mele, ka pae wela a me ke kūlana o ka decomposition metastable, a hiki ke hoʻomaikaʻi i kekahi mau waiwai o ka alloy. ʻO ka pā keleawe keʻokeʻo maʻamau i ke anuanu a me ka hana wela. Hiki ke hana maʻalahi i nā ʻano like ʻole e like me nā papa, nā ʻāpana, nā paipu, nā koʻokoʻo, nā ʻano, a me nā uea. Maikaʻi kuʻihao hana, hiki ke hoʻohana 'ia no ka palupalu a me ka paakiki brazing, kinoea pale arc kuʻihao a me ke kū'ē kuʻihao, etc.; ʻO ka hana ʻoki ʻana he 20% o ke keleawe ʻoki manuahi HPb63-3. ʻO ka pāpaʻi keleawe keʻokeʻo maʻamau he kūpaʻa corrosion maikaʻi, ikaika waena, plasticity kiʻekiʻe, hiki ke hana ʻia e ka wela a me ke anu, a me nā waiwai uila maikaʻi. Ma kahi o ka hoʻohana ʻia ʻana e like me nā mea hana, he mea koʻikoʻi ke kūpaʻa kiʻekiʻe a me ka thermocouple alloy.