karma wire(6J22) with High properties like Isaohm
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)
|