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Description
(Common Name:Ni80Cr20,Nikrothal 8,MWS-650,NiCrA,Tophet A,HAI-NiCr 80,Chromel A,Alloy A,Alloy 650,N8,Resistohm 80, Stablohm 650,Nichorme V,Nikrothal 80.)
Karma wire for precision resistors(0.02mm,0.03mm,0.04mm...)
Karma alloy is made up of copper, nickel, Aluminum and Iron as the main components. The resistivity is 2~3 times higher than Manganin. It has lower temperature coefficient of resistance(TCR), lower thermal EMF versus copper, good permanence of resistance for a long period of time and strong anti-oxidation. Its working temperature range is wider than Manganin (-60~300ºC). It is suitable for making fine precision resistance elements and strain foil.
Chemical Content(%)
| Grade | C | Si | Mn | P | S | Ni | Al | Fe | Cr |
| Karma | ≤0.04 | ≤0.20 | 0.5~1.05 | ≤0.010 | ≤0.010 | Bal. | 2.7~3.2 | 2.0~3.0 | 19.0~21.5 |
Physical Properties
| Grade | Density(g/cm3) |
EMF vs Pt(0-100ºC)μv/ºC |
Max using Temp (ºC) |
Volume resistivity(μΩ.m) |
PPM value (×10-6/ºC) |
| Karma | 8.1 | ≤2.5 | ≤300 | 1.33±8%(20ºC) | ≤±30(20ºC) |