Follow ASTM Standard - C84400 or usually known as Valve Metals grade
Cu: 78.0 to 82.0
Pb: 6.0 to 8.0
Fe: 0.4 max
Sn: 2.3 to 3.5
Zn: 7.0 to 10.0
Al: 0.005 max
Ni: 1.0 max
P: 0.02 max
Si: 0.005 max
Sb: 0.25 max
S: 0.08 max
Follow ASTM Standard - C89833 or usually known as Copper Bismuth Alloy
Cu: 86.0 to 91.0
Pb: 0.09 max
Fe: 0.3 max
Sn: 4.0 to 6.0
Zn: 2.0 to 6.0
Al: 0.005 max
Ni: 1.0 max
P: 0.05 max
Si: 0.005 max
Sb: 0.25 max
S: 0.08 max
Bi: 0.08 max