锡青铜典型牌号化学成份（%）（质量分数）SnAlZnFePbSbBiSiPCu杂质总和QSn4-33.5-4.5＜0.0022.7-3.3＜0.05＜0.02＜0.002＜0.002＜0.002＜0.03余量＜0.2QSn4-4-2.53.0-5.0＜0.0023.0-5.0＜0.051.5-3.5＜0.002＜0.002¨＜0.03余量＜0.2QSn4-4-43.0-5.0＜0.0023.0-5.0＜0.053.5-4.5＜0.002＜0.002¨＜0.03余量＜0.2)