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Copper-based low resistance heating alloy wire

Copper-based heating resistance alloy wire has lower electrical resistance, good mechanical, excellent welding and anti-corrosion properties. It is used to make the key components in the thermal overload relay, low resistance thermal circuit breaker, and the electrical appliances. It is also an important material for electrical heating cable.
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TYPE

CuNi1

NC003

CuNi2

NC005

CuNi6

NC010

CuNi8

NC012

CuMn3

MC012

CuNi10

NC015

CuNi14

NC020

CuNi19

NC025

CuNi23

NC030

CuN30

NC035

CuNi34

NC040

CuNi44

NC050

Composition

(%)

Cu

Rest

Rest

Rest

Rest

Rest

Rest

Rest

Rest

Rest

Rest

Rest

Rest

Mn

--

--

--

--

3

--

0.3

0.5

0.5

1.0

1.0

1.0

Ni

1

2

6

8


10

14.2

19

23

30

34

44

Max.continuous operating temperature

200

200

220

250

200

250

300

300

300

350

350

400

Nominal value μO·m20

0.03±10%

0.05±10%

0.1±10%

0.12±10%

0.12±10%

0.15±10%

0.2±5%

0.25±5%

0.3±5%

0.35±5%

0.4±5%

0.49±5%

Resistance-temperature coefficient×10ˉ6/ 20-600

<100

<120

<60

<57

<38

<50

<38

<25

<16

<10

-0

<-6

Thermovoltage to copper at 20in μV/K

-8

-12

-18

-22

1

-25

-28

-32

-34

-37

-39

-43

Mean coefficient of linear thermal expansion, in 10ˉ6/k, at a temperature between20℃ and 400

17.5

17.5

17.5

17.5

18

17.5

17.5

17.5

17.5

17.0

16.0

15.0

Thermal conductance at 20 W/mK

145

130

92

75

84

59

48

38

33

27

25

23

Specific heat capacity at 20 in 20J/gK

0.38

0.38

0.38

0.38

0.39

0.38

0.38

0.38

0.38

0.39

0.40

0.41

Density at 20(g/cm3)

8.9

8.9

8.9

8.9

8.8

8.9

8.9

8.9

8.9

8.9

8.9

8.9

Melting temperature in

1085

1090

1095

1097

1050

1100

1115

1135

1150

1170

1180

1280

Min. tensile strength in N/mm²

210

220

250

270

290

290

310

340

350

400

400

420

Elongation%

25

25

25

25

25

25

25

25

25

25

25

25

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