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C67300 is a high-strength leaded silicon manganese bronze with typically good bearing qualities. This alloy maintains high impact resistance with excellent machinability making it well suited for clutch bearings, shaft bushings, sleeve bearings, thrust bearings, pump parts, drive shafts, bearing pins, wear plates, gears and cams. This brass resists squashing under high loads and extreme wear applications.
| Weight % | Cu | Al | Fe | Pb | Mn | Ni | Si | Sn | Zn |
|---|---|---|---|---|---|---|---|---|---|
| Minimum | 58.00 | — | — | 0.40 | 2.00 | — | 0.50 | — | Bal |
| Maximum | 63.00 | 0.25 | 0.50 | 3.00 | 3.50 | 0.25 | 1.50 | 0.30 |
| Characteristics | English | Metric | |
|---|---|---|---|
| Nominal density | 20°C / 68°F | 0.293 lbs/in3 | 8.11 g/cm3 |
| Melting point – liquidus | 1605 °F | 874 °C | |
| Specific heat | 20°C / 68°F | 0.0908 BTU/lb – °F | 380 J/KG- °K |
| Thermal conductivity | 20°C / 68°F | 45.8 BTU/ft-hr-°F | 79.3 W/m- °K |
| Average coefficient of
thermal expansion From 20°C (68°F) to temperature, |
200°C / 392°F | 10.6 micro in/in- °F | 19.0 micro m/m- °K |
| Electrical resistivity | 20°C / 68°F | 66.3 nW × m | |
| Temper | Tensile | Hardness | ||||
|---|---|---|---|---|---|---|
| H02- ½ hard temper | Ultimate | Yield | Elongation
2 in. or 50mm |
HRB | ||
| Size | KSI | MPa | KSI | MPa | % | |
| Up to 25.4 mm
(1 in.) inclusive |
65 | 448 | 40 | 276 | 12 | 70-100 |
| 25.4-76.2 mm
(1-3 in.) inclusive |
35 | 241 | 58 | 400 | 15 | 70-100 |
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