Karma Wire (Ni-Cr-Al-Fe)
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Karma wire is made from an alloy composed of copper, nickel, aluminum and iron. These wires are designed for producing fine precision resistance elements.
The resistivity of Karma wire is 2-3 times higher than manganin alloys and it features a lower temperature coefficient of resistance. The working temperature range is also larger than manganin wire (-60~300℃).
Karma (Ni-Cr-Al-Fe) alloy:| Name | Code | Main Composition (%) | Density (g/mm2) | Standard | |||
| Cr | Al | Fe | Ni | ||||
| Karma | 6J22 | 19~21 | 2.5~3.2 | 2.0~3.0 | bal. | 8.1 | JB/T 5328 |
| Name | Code | (20 ℃ ) Resistivity (μΩ.m) | (20 ℃ ) Temp. Coeff. Of Resistance (αX10 -6 / ℃ ) | (0~100 ℃ ) Thermal EMF vs. Copper (μv/ ℃ ) | Max.working Temp.( ℃ ) | Elongation (%) | (N/mm 2 ) Tensile Strength | Standard |
| Karma | 6J22 | 1.33±0.07 | ≤±20 | ≤2.5 | ≤300 | > 7 | ≥780 | JB/T 5328 |
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