Product
Product Details
LG4 Bronze Alloy Casting
LG4 Bronze Alloy Casting is a high-strength leaded gunmetal specified under BS 1400 LG4, containing nominally 86% copper, 8% tin, 4% lead, and 2% zinc. LG4 offers higher tin content than LG2, giving improved strength and hardness for more demanding bearing and structural casting applications. Indicative price: US$ 9.20/kilogram.
LG4 Chemical Composition (BS 1400)
| Element | Min % | Max % |
|---|---|---|
| Copper (Cu) | 84.0 | 88.0 |
| Tin (Sn) | 7.0 | 9.0 |
| Lead (Pb) | 3.0 | 5.0 |
| Zinc (Zn) | 1.0 | 3.0 |
| Nickel (Ni) | — | 2.0 |
| Iron (Fe) | — | 0.20 |
LG4 Mechanical Properties (Sand Cast – BS 1400)
| Property | Value |
|---|---|
| Tensile Strength | 295 MPa min |
| Yield Strength | 140 MPa min |
| Elongation | 15% min |
| Brinell Hardness | 75 HB typical |
| Density | 8.77 g/cm³ |
International Equivalents of LG4 Bronze
| Standard | Designation | Common Name |
|---|---|---|
| UK – BS 1400 | LG4 | Leaded Gunmetal |
| USA – UNS | C90500 | Gun Metal |
| Europe – EN 1982 | CC483K | CuSn7Zn4Pb6 |
| Germany – DIN | 2.1093 | CuSn7ZnPb |
| ISO 1338 | CuSn8 | Tin Bronze |
| Japan – JIS H5111 | CAC407 | Tin Bronze |
Typical Applications
LG4 bronze alloy castings are used for: high-strength bearings and bushings, marine propeller fittings, pump casings and impellers, valve bodies for high-pressure service, structural castings, and bridge bearings.