C6802
Bismuth brass is a copper alloy which typically contains 1-3% bismuth by weight. It is being marketed as a green alternative to leaded brass/bronze bearings and bushings as pressure for the substitution of hazardous metals has increased.
This alloy is very corrosion-resistant, a property which makes it suitable for use in environments such as the ocean. Bismuth brasses are more malleable, thermally conductive and polish better than regular brasses.
Chemical Composition
| Elements |
Min (%) |
Max (%) |
| Cu |
57.00 |
64.00 |
| Bi |
0.50 |
4.00 |
| Sn |
0.10 |
3.00 |
| P |
- |
0.20 |
| Pb |
0.01 |
0.10 |
| Fe |
- |
0.70 |
| Cd |
- |
0.0075 |
| Zn |
Remainder |
Mechanical Properties: JIS H3250: 2015 (As Per Temper BD)
| Range (mm) |
From |
To |
UTS Min (N/mm²) |
UTS Max (N/mm²) |
PS Min (N/mm²) |
Elongation Min (%) |
Hardness Min (HV) |
Hardness Max (HV) |
| Round (Dia) |
1.5 |
75 |
315 |
- |
- |
5 |
75 |
- |
| Hex (A/F) |
3 |
70 |
315 |
- |
- |
5 |
75 |
- |
| Square (A/F) |
3 |
65 |
315 |
- |
- |
5 |
75 |
- |
| Rectangle |
Thickness |
3 |
50 |
315 |
- |
- |
5 |
75 |
- |
Physical Properties
| PHYSICAL PROPERTIES |
| Melting Point - Liquidus °F |
1650 |
| Melting Point - Solidus °F |
1630 |
| Density |
0.304 lb/in3 at 68º F Specific |
| Conductivity |
26% IACS @68º F |
| Thermal Expansion |
11.8 -10?? per ºF (68-572º F) Modulus of Elasticity |
| Gravity |
8.41 |
Fabrication Properties
| FABRICATION PROPERTIES |
| Technique |
Suitability |
| Capacity for Being Cold Worked |
Good |
| Capacity for Being Hot Worked |
Good |
| Machinability |
Closest machinability to the traditional material with lead in all aspects including machining resistance, shape of chips and tool life etc. |
