Karma (Ni-Cr-Al-Fe) alloy wire
With nickel, chromium, aluminum, iron as the main ingredients. Resistivity than manganin higher about three times, and a low temperature coefficient of resistance and low to the copper heat potential, good resistance to long-term stability and antioxidant properties. The use of a wide temperature manganin. Suitable for making precision micro resistance element and strain gauge.
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Thermocouple Wire
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With nickel, chromium, aluminum, iron as the main ingredients. Resistivity than manganin higher about three times, and a low temperature coefficient of resistance and low to the copper heat potential, good resistance to long-term stability and antioxidant properties. The use of a wide temperature manganin. Suitable for making precision micro resistance element and strain gauge.
Chemical composition
| Name | Code | Main Composition% | Standard | |||
| Cr | Al | Fe | Ni | |||
| Karma | 6J22 | 19~21 | 2.5~3.2 | 2.0~3.0 | Bal. | JB/T 5328 |
Properties
| Name | Code | Resistivity(20℃) （μΩ.m） |
Temp.Coeffi. Of Resistance×10-6/℃ |
(0~100℃) Thermal EMF vs. Copper(μv/℃) |
Max.working Temp.(℃) |
Elongation(%) | Tensile Strength (N/mm2) |
Standard |
| Karma | 6J22 | 1.33±0.07 | ≤±20 | ≤2.5 | ≤300 | ＞7 | ≥780 | JB/T 5328 |
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