化学成分:
锡(Sn)3.0~5.0,
锌(Zn)3.0~5.0,
铝(Al)≤0.002,
磷(P)≤0.03,
铁(Fe)≤0.05,
铜(Cu)余量,
铅(Pb)1.5~3.5,
锑(Sb)≤0.002,
铋(Bi)≤0.002,杂质总和%≤0.2
QSn4-4-2.5锡青铜带价格