QZr0.4锆青铜化学成分: 锡(Sn)≤0.05,镍(Ni)≤0.2,硫(S)≤0.01,铜(Cu)余量,锆(Zr)0.30~0.50,铁(Fe)≤0.05,铅(Pb)≤0.01,锑(Sb)≤0.005,铋(Bi)≤0.002,杂质总和%≤0.5