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Alloy No. C86700 is a free-machining, high-tensile (typically 85 000 psi) cast Mn bronze; it is also known as high-strength yellow brass. It has an excellent combination of strength and ductility and good resistance to corrosion in numerous environments, including seawater. Typical uses are valve stems, moderate-duty gears and marine components.
| Weight % | Cu | Al | Fe | Pb | Mn | Ni | Sn | Zn |
|---|---|---|---|---|---|---|---|---|
| Minimum | 55.00 | 1.00 | 1.00 | 0.50 | 1.00 | — | — | 30.00 |
| Maximum | 60.00 | 3.00 | 3.00 | 1.50 | 3.50 | 1.00 | 1.50 | 38.00 |
| Characteristics | English | Metric | |
|---|---|---|---|
| Nominal density | 20°C / 68°F | 0.301 lbs/in3 | 8.32 g/cm3 |
| Melting range | 1580-1620 °F | 860-880 °C | |
| Specific heat capacity | 0.0899 BTU/lb- °F | 376 J/KG- °C | |
| Average coefficient of
thermal expansion |
20°C / 68°F | 10.6 micro in/in- °F | 19.0 micro m/m- °K |
| Electrical resistivity | 20°C / 68°F | 53.9 nΩ×m | |
| Forms | Tensile | Hardness | ||||
|---|---|---|---|---|---|---|
| Ultimate | Yield | Elongation
At break |
Rockwell B | |||
| KSI | MPa | KSI | MPa | % | ||
| All Casting formations | 84.8 | 585 | 42.1 | 290 | 20 | 80 |
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