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牌号 |
化学成分(重量百分比) Chemicai composition(WT%) |
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锡 (Sn) |
锌 (Zn) |
铝 (Al) |
硅 (Si) |
磷 (P) |
铁 (Fe) |
铜 (Cu) |
铅 (Pb) |
锑 (Sb) |
铋 (Bi) |
杂质总和% | |
QSn4-3 | 3.5~4.5 | 2.7~3.3 | ≤0.002 | ≤0.002 | ≤0.03 | ≤0.05 | 余量 | ≤0.02 | ≤0.002 | ≤0.002 | ≤0.2 |