CuSn6Zn6Pb3 Bronze Casting
CuSn6Zn6Pb3 Bronze Casting is a leaded tin-zinc bronze specified under ISO 1338, containing nominally 85% copper, 6% tin, 6% zinc, and 3% lead. This alloy is widely used as the ISO basis for general-purpose leaded gunmetal castings, offering a good balance of strength, castability, machinability, and corrosion resistance. Indicative price: US$ 8.60/kilogram.
CuSn6Zn6Pb3 Chemical Composition (ISO 1338)
| Element |
Min % |
Max % |
| Copper (Cu) |
rem |
— |
| Tin (Sn) |
5.0 |
7.0 |
| Zinc (Zn) |
4.0 |
7.0 |
| Lead (Pb) |
2.0 |
4.0 |
| Nickel (Ni) |
— |
2.0 |
| Iron (Fe) |
— |
0.30 |
CuSn6Zn6Pb3 Mechanical Properties (Sand Cast – ISO 1338)
| Property |
Value |
| Tensile Strength |
250 MPa min |
| Yield Strength (0.2%) |
110 MPa min |
| Elongation |
14% min |
| Brinell Hardness |
65 HB typical |
| Density |
8.83 g/cm³ |
International Equivalents of CuSn6Zn6Pb3
| Standard |
Designation |
Common Name |
| ISO 1338 |
CuSn6Zn6Pb3 |
Leaded Gunmetal |
| Europe – EN 1982 |
CC481K |
CuSn5Zn5Pb5 |
| UK – BS 1400 |
LG2 |
Ounce Metal |
| USA – UNS |
C83600 |
Ounce Metal / Red Brass |
| Germany – DIN |
2.1096 |
CuSn5ZnPb |
| Japan – JIS H5111 |
CAC406 |
Gunmetal |
Typical Applications
CuSn6Zn6Pb3 bronze castings are used for: general engineering valve bodies and fittings, pump casings, marine hardware, water and steam pipe fittings, bearing housings, and low-pressure hydraulic components.
← Back to Tin Bronze Casting
