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C48500 (Naval Brass Leaded) is similar to C46400. The addition of lead provides a high degree of machine-ability. Good capacity for hot-forming but is not recommended for cold-working. Can be readily brazed or soldered, very good corrosion resistance to seawater, high ductility, high electrical / thermal conductivity, high impact strength, good creep resistance. Typical applications include: fasteners, valve stems, light bearings, gears, screw machine parts, marine hardware and seawater valve stems.
| Weight % | Cu | Pb | Sn | Fe | Zn |
|---|---|---|---|---|---|
| Minimum | 59.00 | 1.30 | 0.50 | — | Bal |
| Maximum | 62.00 | 2.20 | 1.00 | 0.10 |
| Characteristics | English | Metric | |
|---|---|---|---|
| Nominal density | 20°C / 68°F | 0.305 lbs/in3 | 8.44g/cm3 |
| Melting range | 1630-1650 °Fz | 885-900 °C | |
| Specific heat | 20°C / 68°F | 0.0908 BTU/lb – °F | 380 J/KG- °K |
| Thermal conductivity | 20°C / 68°F | 67.1 BTU/ft-hr-°F | 116 W/m- °K |
| Average coefficient of
thermal expansion From 20°C (68°F) to temperature, |
300°C / 572°F | 11.8 micro in/in- °F | 21.2 micro m/m- °K |
| Electrical resistivity | 20°C / 68°F | 66.3 nΩ×m | |
| Temper | Tensile | Hardness | Shear | |||||
|---|---|---|---|---|---|---|---|---|
| 25mm diameter
Rod (1”) |
Ultimate | Yield | Elongation at
Break |
HRB | Strength | |||
| KSI | MPa | KSI | MPa | % | KSI | MPa | ||
| O60- soft annealed | 57 | 393 | 24.9 | 172 | 40 | 55 | 36 | 248 |
| H01- ¼ hard (8%) | 69 | 476 | 46 | 317 | 20 | 78 | 39 | 269 |
| H02- ½ hard(10%) | 75 | 517 | 53 | 365 | 15 | 82 | 40 | 276 |
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