Constantan has better corrosion resistance than manganin.
Constantan is also used as the negative element in J and T type thermocouples. Constantan has high resistivity. This makes it ideal for use in resistance grids.
Constantan is also used in the construction of industrial rheostats and wire wound precision resistors
PHYSICAL PROPERTIES
Density - 0.321 lbs/cu.in.
Melting Point (Approx.) - 1210° C
Electrical Resistivity @ R.T. - 50.8 Microhm· cm
Temperature Coefficient of Resistivity (TCR) - ± 30 PPM/° c
(25°C to 105°C)
Thermal Expansion Coefficient (20°C to 100°C) - 14.9 x 10-6/°C
Thermal EMF vs. Copper (0°C to 100°C) - -0.043 Millivolts/°C
Thermal Conductivity R.T. - 21.2W/m· K
Magnetic Attraction - None
Specific Heat - .094 gram· cal./°C