Bright Annealed Manganin 6J12 Precision Alloy with 0.47 ohm·mm²/m Resistivity and 343-539 N/mm² Tensile Strength
6J12 is a copper-manganese-nickel (CuMnNi) precision alloy designed for room temperature applications in electrical and electronic components requiring stable resistance properties.
| GB | JIS | ASTM | SW | DIN | W.Nr | ROCT |
|---|---|---|---|---|---|---|
| 6J12 | - | - | Manganin 47 | - | - | - |
GB/T 6145-1999
- Wire
- Ribbon
- Strip
- Tape
| Alloy | Ni | Mn | Cu |
|---|---|---|---|
| 6J12 | 2-3 | 11-13 | Rest |
| Property | Value | Property | Value |
|---|---|---|---|
| Max Continuous Service Temp | 5-45℃ | Elongation | 6-15% |
| Resistivity at 20℃ | 0.47 ohm·mm²/m | EMF vs Cu (0-100℃) | ≤1 µV/℃ |
| Density | 8.9 g/cm³ | Tensile Strength (Soft) | 343-539 N/mm² |
| Thermal Conductivity | 40 kJ/m·h·℃ | Tensile Strength (Hard) | >637 N/mm² |
| TCR at 20℃ | -3 to +20 × 10⁻⁶/℃ | Hardness (Soft) | 100-172 HV |
| Melting Point | 1450℃ | Hardness (Hard) | 140-300 HV |
Characterized by very low thermal electromotive force (EMF) compared to copper, making it ideal for precision electrical applications where thermal stability is critical.
- Resistance standards and precision wire resistors
- Potentiometers and electrical shunts
- Electronic components requiring stable resistance
- Low-cost replacement for silver solder in hard metal mounting
6J12 is widely used for precision resistors with the highest requirements. For optimal performance, resistors should be carefully stabilized and the application temperature should not exceed +60℃. Exceeding maximum working temperatures may cause resistance drift due to oxidation, potentially affecting long-term stability and slightly changing resistivity and temperature coefficient values.
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