Cuprothal® 49

StripDatasheet

Datasheet updated 2024-09-05 11:12 (supersedes all previous editions)

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^® 49 strip is an austenitic copper-nickel alloy (CuNi alloy) for use at temperatures up to 600°C (1110°F). The alloy is characterized by high electrical resistance, high ductility and good corrosion resistance.

Typical applications are:

Electrical heating
Temperature-stable potentiometers
Industrial rheostats
Electric motor starter resistances.

Chemical composition

	Ni %	Mn %	Fe %	Cu %
Nominal Composition	44.0	1.0	0.5	Bal.

Mechanical properties

Thickness	Yield strength	Tensile strength	Elongation	Hardness
	R_p0.2	R_m	A
mm	MPa	MPa	%	Hv
1	250	430	20	100-130

Physical properties

Density g/cm³	8.9
Electrical resistivity at 20°C Ω mm²/m	0.49

Temperature factor of resistivity
Temperature °C	100	200	300	400	500	600
Ct	1.002	1.002	1.001	1.005	1.017	1.037

Coefficient of thermal expansion
Temperature °C	Thermal Expansion X10^-6/K
20-100	14

Thermal conductivity
Temperature °C	20
W m^-1 K^-1	21.0

Specific heat capacity
Temperature °C	20
kJ kg^-1 K^-1	0.410

Melting point °C	1280
Max continuous operating temperature in air °C	600
Magnetic properties	The material is non-magnetic