Iron TC

Thermocouple Iron is a specially developed pure Iron which, when used with the appropriate Copper Nickel alloy, forms a thermocouple pair with thermal e.m.f characteristics in accordance with Type J.


International and other national specifications are available on request. Material is normally produced to provide an e.m.f. to BS EN 60584-1 1996 Type J with tolerances to Type J (Thermocouple grade to BS EN 60584-2) or Type JX (Extension grade to BS EN60584-3).

Physical and Mechanical Properties

Nominal composition%Fe > 99.9
Density at 20°Cg/cm³7.86
Resistivity at 20°CµΩcm12.5
Temperature Coefficient of Resistance, 20 – 100°C1/K0.006
Coefficient of thermal expansion, 20 – 100°C1/K12 x 10^6
Thermal conductivity at 20°CW/mK81
Specific heat capacity at 20°CkJ/kgK0.47
Melting point (approx.)°C1496
Typical Tensile strength – annealed *N/mm²370
Typical Tensile Strength – fully cold worked *N/mm²600
Typical Elongation at break – annealed *%> 25

* Values will vary dependant upon wire diameter

The figures given in these tables represent nominal or typical values.

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.