Constantan TC

 

Constantan for Thermocouple, Extension and Compensating Wires.

Material can be ordered to all National or International emf standards as well as customer’s own specifications.Scott Precision Wire Constantan alloys are available in solid wire, strip or tape and flexible bunch or strand constructions. 

The alloy composition is carefully controlled to provide a range of emf outputs to suit the following thermocouple combinations:


Thermocouple Type

Constantan Alloy

RangeTemp.

Constantan Description

J

ConJ

ConJX

0 - 750°C

0 - 200°C

to form the negative leg of the thermocouple or extension wire combination.Matched to Thermocouple Iron

T

ConT

ConTX

0 - 350°C

0 - 100°C

to form the negative leg of the thermocouple or extension wire combination.Matched to Thermocouple Copper

E

ConE

ConEX

0 - 900°C

0 - 200°C

to form the negative leg of the thermocouple or extension wire combination.Matched to Nicro

K (KC) Compensating

ConKCA

ConKCB

0 - 150°C

0 - 100°C

to form the negative leg of the compensating wire combination.Matched to Thermocouple Copper

Other formulations to achieve specific emf outputs are also available on request.

Physical and Mechanical Properties (Values stated are nominal or typical.) 

 

Units

Constantan

Nominal composition

%

Cu 56

Ni 44

Density at 20°C

g/cm³

8.9

Resistivity at 20°C

µWcm

49

Temperature Coefficient of Resistance

1/K

0.00004

Coefficient of thermal expansion 20 – 100°C

1/K

13.5 x 10-6

Thermal conductivity at 20°C

W/mK

23

Specific Heat Capacity at 20°C

kJ/kgK

0.41

Melting point (approx.)

°C

1280

Magnetic properties

 

Non-Magnetic

Tensile strength Rm(0.5mm annealed wire)

N/mm²

420


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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