LG2 Bronze Alloy Casting
LG2 Bronze Alloy Casting is the most widely used leaded gunmetal specified under BS 1400 LG2, containing nominally 85% copper, 5% tin, 5% lead, and 5% zinc — the classic 85-5-5-5 “ounce metal” composition. LG2 offers excellent pressure tightness, good machinability, and versatility across a wide range of industrial applications. Indicative price: US$ 8.50/kilogram.
LG2 Chemical Composition (BS 1400)
| Element |
Min % |
Max % |
| Copper (Cu) |
83.0 |
87.0 |
| Tin (Sn) |
4.0 |
6.0 |
| Lead (Pb) |
4.0 |
6.0 |
| Zinc (Zn) |
4.0 |
6.0 |
| Nickel (Ni) |
— |
2.0 |
| Iron (Fe) |
— |
0.20 |
LG2 Mechanical Properties (Sand Cast – BS 1400)
| Property |
Value |
| Tensile Strength |
270 MPa min |
| Yield Strength |
120 MPa min |
| Elongation |
16% min |
| Brinell Hardness |
65 HB typical |
| Density |
8.85 g/cm³ |
International Equivalents of LG2 Bronze
| Standard |
Designation |
Common Name |
| UK – BS 1400 |
LG2 |
Leaded Gunmetal (85-5-5-5) |
| USA – UNS |
C83600 |
Ounce Metal |
| Europe – EN 1982 |
CC491K |
CuSn5Zn5Pb5 |
| Germany – DIN |
2.1096 |
CuSn5ZnPb |
| ISO 1338 |
CuSn5Zn5Pb5 |
Leaded Gunmetal |
| Japan – JIS H5111 |
CAC406 |
Gunmetal |
Typical Applications
LG2 bronze alloy castings are used for: general engineering valve bodies and fittings, pump housings, water and steam pipe fittings, automotive components, bearing housings, electrical accessories, and marine hardware.
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