Nikrothal® 80

StripDatasheet

Datasheet updated 2024-09-05 12:02 (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^®.

Nikrothal^® 80 strip is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1200°C (2190°F). The alloy is characterized by high resistivity, good oxidation resistance and very good form stability. Nikrothal 80 has good ductility after use and excellent weldability. It has good corrosion resistance except in sulphur containing atmospheres and certain controlled atmospheres. Nikrothal^® 80 has a lower Ct factor than the other Nikrothal^® alloys.

Typical applications for Nikrothal^® 80 strip are as braking resistors and as electrical heating elements in industrial furnaces.

Chemical composition

	C %	Si %	Mn %	Cr %	Fe %	Ni %
Nominal Composition						Bal.
Min	-	1.0	-	19.0	-	-
Max	0.10	1.7	1.0	21.0	2.0	-

Mechanical properties

Strip Thickness	Yield strength	Tensile strength	Elongation	Hardness
	R_p0.2	R_m	A
mm	MPa	MPa	%	Hv
1.0	400	700	35	170
2.0	340	660	40	180

Mechanical properties at elevated temperature
Temperature °C	900
MPa	100

Ultimate tensile strength - deformation rate 6.2 x 10 -2 min -1

Creep strength - 1% elongation in 1000 h
Temperature °C	800	1000
MPa	15	4

Physical properties

Density g/cm³	8.30
Electrical resistivity at 20°C Ω mm²/m	1.09

Temperature factor of resistivity
Temperature °C	100	200	300	400	500	600	700	800	900	1000	1100	1200
Ct	1.01	1.02	1.03	1.04	1.05	1.04	1.04	1.04	1.04	1.05	1.06	1.07

Coefficient of thermal expansion
Temperature °C	Thermal Expansion x 10^-6/ K
20 - 250	15
20 - 500	16
20 - 750	17
20 - 1000	18

Thermal Conductivity
Temperature °C	20	100	200	300	400	500	600	700	800	900	1000	1100
W m^-1 K^-1	15	15	15	15	17	19	21	22	24	26	28	30

Specific heat capacity
Temperature °C	20	100	200	300	400	500	600	700	800	900	1000	1100
kJ kg^-1 K^-1	0.46	0.46	0.48	0.50	0.52	0.54	0.56	0.60	0.63	0.65	0.67	0.70

Melting point °C	1400
Max continuous operating temperature in air °C	1200
Magnetic properties	The material is non- magnetic.
Emissivity - fully oxidized material	0.88