leaded gunmetal
A traditional, versatile alloy known for good machinability, corrosion resistance and pressure-tight casting properties.
BS1400:1985 LG1
Cu Balance
Sn 2 - 3.5%
Zn 7.5 - 9.5%
Pb 4 - 6%
Ni 2% max
Al 0.01% max
Si 0.02% max
CuSn3Zn8Pb5-B EN CB490K
Cu + Ni 81 - 85.5% (Ni < 2%)
Sn 2.2 - 3.5%
Zn 7.5 - 10%
Pb 3.5 - 5.8%
Fe 0.5% max
ASTM B271 C84400
Cu 79 - 82%
Sn 2 - 3.5%
Zn 7 - 10%
Pb 6.3 - 7.7%
Ni 0.8% max
Fe 0.35% max
Sb 0.25% max
S 0.08% max
BS1400:1985 LG2
Cu Balance
Sn 4 - 6%
Zn 4.5 - 6%
Pb 4 - 6%
Ni 2% max
Fe 0.25% max
Al 0.01% max
Si 0.5% max
Bi 0.05% max
ASTM B62 C83600
Cu 84 - 86%
Sn 4.3 - 6%
Zn 4.3 - 6%
Pb 4 - 5.7%
Ni 0.8% max
Fe 0.25% max
Sb 0.25% max
S 0.08% max
CuSn5Zn5Pb5-B EN 1982-2008 CB491K
Cu + Ni 83 - 86.5% (Ni < 2%)
Sn 4.2 - 6%
Zn 4.5 - 6.5%
Pb 4.2 - 5.8%
Fe 0.25% max
NS16530:1977 CuSn5Pb5Zn5
Cu Balance
Sn 4 - 6%
Zn 4 - 6%
Pb 4 - 6%
Ni 2% max
Fe 0.3% max
Sb 0.25% max
S 0.1% max
DIN 17656 1973 GB CuSn5ZnPb (RG5)
Cu 83.5 - 85.5%
Sn 4 - 6%
Zn 4.5 - 6.5%
Pb 4 - 6%
Ni 2.3% max
Fe 0.2 - 0.3% max
Sb 0.25% max
S 0.06 - 0.1% max
BS1400:1985 LG3
Cu Balance
Sn 6.5 - 7.5%
Zn 1.5 - 3%
Pb 0.1 - 0.5%
Ni 5.25 - 5.75%
Si 0.02% max
ASTM B30 C92200
Cu 86 - 89%
Sn 5.8 - 6.5%
Zn 3.5 - 5%
Pb 1 - 1.8%
Ni 0.8% max
Fe 0.2% max
Sb 0.2% max
S 0.05% max
CuSn6Zn4Pb2-B EN 1982-2008 CB498K
Cu + Ni 86 - 90% (Ni < 1%)
Sn 5.5 - 6.5%
Zn 3 - 5%
Pb 1 - 2%
Fe 0.25% max
Sb 0.25% max
BS1400:1985 LG4
Cu Balance
Sn 6 - 8%
Zn 1.7 - 3.2%
Pb 2.7 - 3.5%
Ni* 2% max
Al 0.01% max
Sb 0.25% max
As 0.15% max
Si 0.01% max
​
*Ni to be counted as Cu
CuSn7Zn2Pb3-B EN 1982-2008 CB492K
Cu + Ni 85 - 88.5% (Ni < 2%)
Sn 6.2 - 8%
Zn 1.7 - 3.2%
Pb 2.7 - 3.5%
Fe 0.2% max
Sb 0.25% max
DIN 17656 1973 GB CuSn6ZnNi (RG6)
Cu Balance
Sn 5.5 - 7%
Zn 0.3% max
Pb 0.03% max
Ni 0.2% max
Fe 0.1% max