QSn6.5-0.1锡青铜化学成分: Sn:6.0-7.0 P:0.10-0.25 Zn:≤0.30 Ni:≤0.20 Fe:≤0.05 Pb:≤0.02 Al:≤0.002 杂质:≤0.1 Cu:余量