Ohmalloy Material Co.,Ltd
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6J13 bar Shunt Manganin CuMn12Ni4 rod CuMn12Ni2 Cu-Mn Alloy
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 .
| Nickel | 2~3 | Manganese | 11~13 |
| Copper | Bal. |
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 180 | 390 | 15 |
| 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 | |
FAQ
1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you want.
If we do not have, for spool wire, we can produce 1 spool, about 2-3kg. For coil wire, 25kg.
2. How can you pay for small sample amount?
We have account, wire transfer for sample amount also ok.
3. Customer do not have express account. How will us arrange the delivery for sample order?
Just need to provide your address information, we will check the express cost, you can arrange the express cost together with sample value.
4. What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery and total amount. Let's talk more in details after getting your detailed requirements.
5. Do you provide free samples?
If you want several meters and we have stock of your size, we can provide, customer need to bear the International express cost.
6. What's our working time?
We will give you reply through email/phone Online contact tool within 24 hours. No matter working day or holidays.