Shanghai Tankii Alloy Material Co.,Ltd
Shanghai Tankii Alloy Material Co.,Ltd First Quality, Sincere Service
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0.7mm 6J12/ 6J13 Resistance Alloy Bright Surface Round Wire For Precision Resistors
Description
Manganin is a trademarked name for an alloy of typically 86% copper, 12% manganese, and 2% nickel.
A resistance alloy with moderate resistivity and low temperature coefficent. The resistance/temperature curve is not as flat as the constantans nor are the corrosion resistance properties as good.
Chemical Content, %
| Ni | Mn | Fe | Si | Cu | Other | ROHS Directive | |||
| Cd | Pb | Hg | Cr | ||||||
| 2~5 | 11~13 | <0.5 | micro | Bal | - | ND | ND | ND | ND |
Manganin is a trademarked name for an alloy of typically 84% copper, 12% manganese, and 4% nickel. It was first developed by Edward Weston in 1892, improving upon his Constantan (1887).
Manganin foil and wire is used in the manufacture of resistors, particularly ammeter shunts, because of its virtually zero temperature coefficient of resistance value and long term stability. Several Manganin resistors served as the legal standard for the ohm in the United States from 1901 to 1990. Manganin wire is also used as an electrical conductor in cryogenic systems, minimizing heat transfer between points which need electrical connections.
Manganin is also used in gauges for studies of high-pressure shock waves (such as those generated from the detonation of explosives) because it has low strain sensitivity but high hydrostatic pressure sensitivity.
| Physical properties | |
| Density(ρ) | 8.4 g/cm3 |
| Mechanical properties | |
| Tensile Strength (σt) | 300–600 MPa |
| Elongation at break | <50% |
| Izod impact strength | 107 J/m |
| Thermal properties | |
| Melting temperature | 1020 °C |
| Thermal conductivity (k) at 23 °C | 22 W/(m·K) |
| Linear thermal expansion coefficient | (14–19)×10−6 K−1 |
| Specific heat capacity | 0.097 cals/gm |
| 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 |
