CuMn12Ni2 Copper Based Alloys , 0.1mm Manganin Wire For Resistance
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Normal Manganin 47(Precision Resistance Alloy)
(Common Name:Normal Manganin,Normal Manganin 47,CuMn12Ni2 )
Normal Manganina 47 is a copper-manganese-nickel alloy (CuMnNi
alloy) for use at room temperature. The alloy is characterized by
very low thermal electromotive force (emf) compared to copper.
Normal Manganina 47 is typically used for the manufacturing of
resistance standards, precision wire wound resistors,
potentiometers, shunts and other electrical and electronic
components.
Normal Manganin 47 widely used for precision resistors with the
highest requirements, the resistors should be carefully stabilised
and the application temperature should not exceed +60 °C. Exceeding
the maximum working temperature in air may result in a resistance
drift generated by oxidizing. Thus, the long-term stability can be
affected negatively. As a result, the resistivity as well as the
temperature coefficient of the electric resistance may slightly
change.
It is also used as low cost replacement material for silver solder
for hard metal mounting.The alloy's low emf vs. copper makes it
ideal for use in electrical circuits, especially D.C., where a
spurious thermal emf could cause malfunctioning of electronic
equipment. Due to the low operating temperature, the temperature
coefficient of resistance is controlled to be low over a range of
15 to 35°C .
Normal composition%
| Nickel | 2~3 | Manganese | 11~13 |
| Copper | Bal. | | |
Typical Mechanical properties(1.0mm)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 180 | 390 | 15 |
Typical Physical properties
| Density (g/cm3) | 8.44 |
| Electrical resistivity at 20℃ (Ωmm2/m) | 0.47 |
| Temperature factor of resistivity(20℃~600℃)X10-5/℃ | -3~20 |
| Conductivity coefficient at 20℃ (WmK) | 40 |
| EMF vs Cu(μV/℃ )(0~100℃ ) | 1 |
| Coefficient of thermal expansion |
| Temperature | Thermal Expansion x10-6/K |
| 20 ℃- 400℃ | 18 |
| Specific heat capacity |
| Temperature | 20℃ |
| J/gK | 0.41 |
| Melting point (℃) | 960 |
| Element working temperature in air (℃) | 5~45 |
| Magnetic properties | non-magnetic |
Corrosion resistance performance
| Alloys | Working In atmosphere at 20℃ | Working at max temperature 200℃ |
Air and oxygen contain gases | gases with Nitrogen | gases with sulfur oxidability | gases with sulfur reductibility | carburization |
| Manganin 47 | good | good | good | good | bad | good |
Style of supply
| Alloys Name | Type | Dimension |
| Manganin 47W | Wire | D=0.03mm~8mm |
| Manganin 47R | Ribbon | W=0.4~40 | T=0.03~2.9mm |
| Manganin 47S | Strip | W=8~200mm | T=0.1~3.0 |
| Manganin 47F | Foil | W=6~120mm | T=0.003~0.1 |
| Manganin 47B | Bar | Dia=8~100mm | L=50~1000 |
