銅(tong)(tong)合(he)(he)金(jin)(jin)就(jiu)是純銅(tong)(tong)和其(qi)他金(jin)(jin)屬(shu)或(huo)者非金(jin)(jin)屬(shu)融合(he)(he)在(zai)一起，形成(cheng)(cheng)有金(jin)(jin)屬(shu)特性(xing)(xing)的(de)元素(su)所構成(cheng)(cheng)的(de)合(he)(he)金(jin)(jin)混合(he)(he)物。也就(jiu)是說這(zhe)種合(he)(he)金(jin)(jin)中(zhong)一定含(han)有銅(tong)(tong)，至(zhi)于含(han)有其(qi)他什么就(jiu)不(bu)一定了。不(bu)同的(de)銅(tong)(tong)合(he)(he)金(jin)(jin)成(cheng)(cheng)分不(bu)同。銅(tong)(tong)具有優良的(de)導(dao)電(dian)性(xing)(xing)﹑導(dao)熱性(xing)(xing)﹑延展性(xing)(xing)和耐(nai)蝕(shi)性(xing)(xing)。主要用于制作發電(dian)機﹑母線﹑電(dian)纜(lan)﹑開(kai)關裝(zhuang)置﹑變(bian)壓(ya)器(qi)(qi)等(deng)電(dian)工器(qi)(qi)材和熱交換器(qi)(qi)﹑管(guan)道(dao)﹑太(tai)陽能加(jia)熱裝(zhuang)置的(de)平板(ban)集熱器(qi)(qi)等(deng)導(dao)熱器(qi)(qi)材。常(chang)用的(de)銅(tong)(tong)合(he)(he)金(jin)(jin)分為(wei)黃銅(tong)(tong)﹑青銅(tong)(tong)﹑白銅(tong)(tong)3大類。
銅合金種類：純銅﹑黃銅﹑紫銅﹑青銅（鋁青銅﹑錫青銅﹑硅青銅）﹑白銅﹑鈹銅﹑鈹鈷銅
