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Karm alloy (Ni-Cr-Al-Fe)

Karm alloy have common name Nikrothal L/Evanohm/Alloy 800, Karm alloy is made up of nickel,chrome, 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.
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Karm alloy have common name Nikrothal L/Evanohm/Alloy 800, Karm alloy is made up of nickel,chrome, 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.

Name

产品名称

Code

合金牌号

Main Composition (%)主要成分

Density

密度

(g/mm2)

Standard

执行标准

Cr铬

Al铝

Fe铁

Ni镍

Karm alloy

卡玛

6J22

19~21

2.5~3.2

2.0~3.0

bal. 余量

8.1

JB/T 5328

Name

产品名称

Code

合金牌号

(20℃)
Resistivity
(μΩ.m)

电阻率

(20℃)
Temp. Coeff. Of Resistance
(αX10-6/℃)

电阻温度系数

(0~100℃)
Thermal EMF vs. Copper
(μv/℃)

对Cu热电势

Max.working
Temp.(℃)

导线最高使用温度

Elongation

延伸率(%)

(N/mm2)
Tensile
Strength

抗拉强度

Standard

执行标准

Karm alloy

卡玛

6J22

1.33±0.07

≤±20

≤2.5

≤300

>7

≥780

JB/T 5328


Karm alloy (6J22) Technical Data of Wires

Dia.线径(mm)

Cross-sectional area截面积(mm2)

Weight/Meter每米重量
(g/m)

Resistance/Meter at 20℃每米电阻(Ω/m)

Dia.线径(mm)

Cross-sectional area截面积(mm2)

Weight/Meter每米重量
(g/m)

Resistance/Meter

at 20℃每米电阻(Ω/m)

0.018

0.0002550

0.002066

4707-5749

0.25

0.04909

0.3976

25.74-28.45


0.020

0.000314

0.002543

3810-4657

0.28

0.06158

0.4988

20.52-22.68


0.022

0.000380

0.003078

3149-3849

0.30

0.07069

0.5726

17.87-19.76


0.025

0.000491

0.003977

2439-2980

0.32

0.07548

0.6114

16.74-18.5


0.028

0.000616

0.00499

1944-2376

0.33

0.08553

0.6928

14.78-16.33


0.030

0.000707

0.005727

1750-2015

0.38

0.1134

0.9185

11.13-12.31


0.032

0.000804

0.006512

1488-1819

0.40

0.1257

1.0182

10.05-11.11


0.035

0.000962

0.007792

1244-1521

0.41

0.1320

1.0692

9.57-10.57


0.040

0.001257

0.01018

953-1164

0.45

0.1590

1.288

7.94-8.77


0.045

0.001590

0.01288

752.6-919.9

0.50

0.1963

1.590

6.43-7.11


0.050

0.001963

0.0159

609.6-745.1

0.55

0.2376

1.9246

5.32-5.88


0.055

0.00238

0.01928

515.0-604.6

0.60

0.2827

2.2899

4.46-4.94


0.063

0.00312

0.02527

392.2-460.4

0.65

0.3318

2.6876

3.81-4.21


0.070

0.00385

0.03119

317.9-373.2

0.70

0.3848

3.1169

3.27-3.62


0.080

0.005027

0.0407

243.4-285.8

0.75

0.4418

3.5786

2.85-3.16


0.090

0.006362

0.0515

192.3-225.8

0.80

0.5027

4.0719

2.51-2.77


0.100

0.007854

0.0636

155.8-182.9

0.85

0.5674

4.5959

2.22-2.45


0.110

0.009852

0.0798

128.8-151.1

0.90

0.6362

5.1532

1.98-2.19


0.120

0.01227

0.0994

111.7-123.5

0.95

0.7088

5.7413

1.79-1.97


0.140

0.01539

0.1247

82.08-90.72

1.00

0.7854

6.3617

1.60-1.77


0.150

0.01767

0.1431

71.51-79.03

1.10

0.9503

7.6974

1.33-1.47


0.160

0.02011

0.1629

62.84-69.46

1.12

0.9852

7.9801

1.28-1.42


0.170

0.02270

0.1839

55.66-61.52

1.18

1.0936

8.8582

1.16-1.28


0.180

0.02545

0.2061

49.65-54.88

1.20

1.313

9.1611

1.11-1.23


0.190

0.02835

0.2296

44.56-49.26

1.30

1.327

10.7487

0.95-1.05


0.200

0.03142

0.2545

40.22-44.45

1.40

1.539

12.466

0.82-0.90


0.212

0.03530

0.2859

35.80-39.56

1.50

1.767

14.3127

0.71-0.79


0.220

0.03801

0.3079

33.24-36.74

1.60

2.011

16.2891

0.63-0.69


Size Range:



Diameter直径(mm)

Tolerance允许偏差(mm)

Wires 冷拉线材

0.018~0.025

±0.001

0.028~0.055

±0.003

0.070~0.14

±0.004

0.16~0.20

±0.005

0.22~0.25

±0.006

0.28~0.30

±0.007

0.32~0.40

±0.01

0.41~0.50

±0.015

0.55~0.80

+0.02/-0.03

0.85~1.00

+0.02/-0.03

1.10~1.50

±0.03



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