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Karma Alloy

Karma Alloy

Karma alloyKarma 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

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Karma alloy

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 (-60~300℃). 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(0-100℃)μv/℃

Max using
     Temp (℃)

Volume
     resistivity(μΩ.m)

PPM value
     (×10-6/℃)

Karma

8.1

≤2.5

≤300

1.33±8%(20℃)

≤±30(20℃)

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