Dec 19 2012
Copper-bismuth alloy UNS C89720 has a copper content of not less than 63%.
The following table shows the mechanical properties of UNS C89720 sand cast alloy as a function of heat treatment.
| Temper |
Tensile Str. |
Yield Str. |
Elong. |
Rockwell |
| B |
C |
F |
30T |
| SEE |
200MPa (29ksi) |
105MPa (15ksi) |
- |
- |
- |
- |
- |
| SEE |
240MPa (34ksi) |
115MPa (16ksi) |
18% |
80 |
- |
- |
- |
The chemical composition of UNS C89720 copper alloy is outlined in the following table.
| Element |
Content (%) |
| Copper, Cu |
63 minimum |
| Zinc, Zn |
26-32 |
| Tin, Sn |
0.6-1.5 |
| Bismuth, Bi |
0.5-2 |
| Silicon, Si |
0.4-1 |
| Aluminum, Al |
0.35-1.5 |
| Manganese, Mn |
0.1 |
| Nickel, Ni |
0.1 |
| Iron, Fe |
0.1 |
| Lead, Pb |
0.09 |
| Antimony, Sb |
0.02-0.2 |
| Phosphorous, P |
0.02 |
| Boron, B |
0.0005-0.1 |