good mechanical properties, corrosion resistance high,

Cu:54.0-58.0;Sn:≤0.25;Pb:≤0.20;P:≤0.01;Ni:2.00-3.00;Fe:≤0.15-0.50;Zn:left part;Al:≤0.30-0.50.Notice:total impurity≤0.6