Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for materials under the trademark Kanthal®.
Cuprothal® 49TC is a copper-nickel alloy (CuNi alloy) characterized by high electrical resistance, high ductility and good corrosion resistance. It is suitable for use at temperatures up to 600°C (1110°F).
Typical applications for Cuprothal® 49TC are temperature-stable potentiometers, industrial rheostats and electric motor starter resistances.
The combination of negligible temperature coefficient and high resistivity makes the alloy particularly suitable for the winding of precision resistors.
Cuprothal® 49TC is manufactured from electrolytic copper and pure nickel.
Ni %
Mn %
Fe %
Cu %
Nominal Composition
44.0
1.0
0.5
Bal.
Wire size
Yield strength
Tensile strength
Elongation
Hardness
Ø
Rp0.2
Rm
A
mm (in)
MPa (ksi)
MPa (ksi)
%
Hv
1.00 (0.04)
250 (36)
480 (70)
30
100-130
Density g/cm3 (lb/in3)
8.9 (0.322)
Electrical resistivity at 20°C Ω mm2/m (Ω circ. mil/ft)
0.49 (295)
Temperature coefficient of resistance K-1
± 20 ppm (wire < 0.30 mm)
± 60 ppm (wire > 0.30 mm)
Temperature factor of resistivity
Temperature °C
100
200
300
400
500
600
Temperature °F
212
392
572
752
932
1112
Ct
1.002
1.002
1.001
1.005
1.017
1.037
Coefficient of thermal expansion
Temperature °C (°F)
Thermal Expansion X10-6/K (10-6 /°F)
20-100 (68-212)
14 (7.8)
Thermal conductivity
Temperature °C (°F)
20 (68)
W m-1 K-1 (Btu h-1ft-1°F-1)
21.0 (12.1)
Specific heat capacity
Temperature °C (°F)
20 (68)
kJ kg-1 K-1 (Btu lb-1 °F-1)
0.410 (0.10)
Melting point °C (°F)
1280 (2336)
Max continuous operating temperature in air °C (°F)
600 (1112)
Magnetic properties
The material is non-magnetic
Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for materials under the trademark Kanthal®.
