Manganin
| Manganin | ||
|---|---|---|
resistivity (ρ) 43–48 μΩ⋅cm | | |
| Source[1] | ||
Manganin is a trademarked name for an alloy of typically 84.2% copper, 12.1% manganese, and 3.7% nickel. It was first developed by Edward Weston in 1892, improving upon his Constantan (1887).
Manganin
Manganin is also used in gauges for studies of
History
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In 1887 Edward Weston discovered that metals can have a negative temperature coefficient of resistance, inventing what he called his "Alloy No. 2." It was produced in Germany where it was renamed "Constantan".[5] Five years later, after experimenting with alloys of copper, nickel, and manganese, he developed Manganin. In May 1893, Weston received a patent for the material and its use for resistors. While Manganin represented a significant advance in technology -- the material was a conductive metal with constant resistance over a wide range of working temperatures, Weston did not receive wide recognition at the time.[6]
Properties
Cu86/Mn12/Ni2
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Electrical Properties
- Temperature coefficient: 1.5×10−5 K−1
Mechanical Properties
- Modulus of elasticity: 124–159 GPa
- Maximum use temperature in air: 300 °C
| Temperature [°C] | coefficient of resistivity |
|---|---|
| 12 | +.000006 |
| 25 | .000000 |
| 100 | −.000042 |
| 250 | −.000052 |
| 475 | .000000 |
| 500 | +.00011 |
AWG
|
ohms per cm | ohms per ft |
|---|---|---|
| 10 | .000836 | 0.0255 |
| 12 | .00133 | 0.0405 |
| 14 | .00211 | 0.0644 |
| 16 | .00336 | 0.102 |
| 18 | .00535 | 0.163 |
| 20 | .00850 | 0.259 |
| 22 | .0135 | 0.412 |
| 24 | .0215 | 0.655 |
| 26 | .0342 | 1.04 |
| 27 | .0431 | 1.31 |
| 28 | .0543 | 1.66 |
| 30 | .0864 | 2.63 |
| 32 | .137 | 4.19 |
| 34 | .218 | 6.66 |
| 36 | .347 | 10.6 |
| 40 | .878 | 26.8 |
See also
References
- ^ "Manganin 230 Shunt Wire". California Fine Wire Co. Retrieved 13 January 2018.
- ^ "Goodfellow Technical Information Manganin® - Resistance Alloy". www.goodfellow.com. Retrieved 2016-09-11.
- ^ "Stability of Double-Walled Manganin Resistors" (PDF). Archived from the original (PDF) on 2006-10-06. Retrieved 2007-04-30.
- ^ "Special Use Sensors - Manganin Pressure Sensor" (PDF). web.sensor-ic.com. Vishay. Retrieved 15 April 2023.[permanent dead link]
- ^ National Electrical Manufacturers Association (1946). A chronological history of electrical development from 600 B.C. New York, N.Y., National Electrical Manufacturers Association.
- ^ Woodbury, David O. (1949). A Measure for Greatness; A Short Biography of Edward Weston. New York, Toronto, London: McGraw-Hill.
- ^ CRC Handbook 27th ed. Feb 1943. p. 1875.
- ^ CRC Handbook 27th ed. Feb 1943. p. 2485.