Copper Nickel Alloys

 

 

Copper Nickel Alloys are available in a range of resistivities. They are particularly useful in low to medium temperature heating applications or where good corrosion resistance is required. Wires are available down to 0.06mm and they may be bunched or stranded for improved flexibility.

Physical and Mechanical Properties

                                                                                                                                                                                                                      

 

Units

98/02

94/06

90/10

85/15

80/20

Constantan

Maximum continuous operating temperature in air

°C

300

300

400

450

500

600

Nominal composition

%

Cu 98

Ni 2

Cu 94

Ni 6

Cu 90

Ni 10

Cu 85

Ni 15

Cu 80

Ni 20

Cu 56

Ni 44

Density at 20°C

g/cm³

8.9

8.9

8.9

8.9

8.9

8.9

Resistivity at 20°C

µWcm

5

10

15

21

30

49

Temperature Coefficient of Resistance, 20 – 100°C

1/K

0.0013

0.0007

0.00063

0.00035

0.00024

0.00004

Coefficient of thermal expansion, 20 –100°C

1/K x 10-6

17.7

17.5

17.1

16.9

16.4

13.5

Thermal conductivity at 20°C

W/mK

-

67

50

45

38

23

Specific heat capacity at 20°C

kJ/kgK

-

0.38

0.38

0.38

0.38

0.41

Melting point (approx.)

°C

1050

1080

1105

1115

1135

1280

Typical Tensile strength - annealed *

N/mm²

220

230

250

290

340

420

Typical Elongation at break - annealed *

%

>25

>25

>25

>25

>25

>25

Figures given in the table are nominal or typical values.

* Values will vary dependant upon wire diameter.

Information contained within this technical data sheet is based upon the general experience of Scott Precision Wire Ltd and is believed to be correct at the time of issue. 

No warranty is given or is to be implied from  the details above. 

Customers are advised to carry out independent tests in order to determine the suitability of any Scott Precision Wire Ltd product for an application.


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