美國(guo)的廢雜銅(tong)(tong)依據純度進行分(fen)(fen)類.美國(guo)廢雜金(jin)屬(shu)再(zai)生研究所(suo)甚至把銅(tong)(tong)及其合金(jin)細分(fen)(fen)為53類.通常把含(han)(han)cu量(liang)大于(yu)99%的銅(tong)(tong)材叫作(zuo)1號(hao)銅(tong)(tong),可以(yi)直接重熔和使用,不(bu)要求進一(yi)步(bu)加(jia)工(gong);銅(tong)(tong)含(han)(han)量(liang)較低為94.5%的銅(tong)(tong)叫作(zuo)2號(hao)銅(tong)(tong),在(zai)以(yi)金(jin)屬(shu)銅(tong)(tong)的形(xing)態使用之前,必須重熔;其他常見的分(fen)(fen)類等級還(huan)包(bao)括加(jia)鉛(qian)黃(huang)(huang)銅(tong)(tong)、黃(huang)(huang)銅(tong)(tong)與低鋅黃(huang)(huang)銅(tong)(tong)、彈殼黃(huang)(huang)銅(tong)(tong)、汽車散熱片、高(gao)銅(tong)(tong)黃(huang)(huang)銅(tong)(tong)(紅色黃(huang)(huang)銅(tong)(tong))、高(gao)速切削黃(huang)(huang)銅(tong)(tong)等,可以(yi)以(yi)同成分(fen)(fen)合金(jin)的形(xing)式用于(yu)重新(xin)加(jia)工(gong)銅(tong)(tong)制品.

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