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® 40 ribbon is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1100°C (2010°F). The alloy is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent weldability.
Typical applications for Nikrothal® 40 ribbon are night-storage heaters, convection heaters, heavy duty rheostats and fan heaters. The alloy is also used for heating cables and rope heaters in defrosting and de-icing elements, electric blankets and pads, car seats, baseboard heaters and floor heaters, resistors.
C %
Si %
Mn %
Cr %
Ni %
Fe %
Nominal Composition
Bal.
Min
-
1.6
-
18.0
34.0
Max
0.10
2.5
1.0
21.0
37.0
Thickness
Yield Strength
Tensile strength
Elongation
Hardness
Rp0.2
Rm
A
mm
MPa
MPa
%
Hv
0.15
365
710
30
160
Mechanical properties at elevated temperature
Temperature °C
800
900
1000
MPa
170
95
58
Ultimate tensile strength - deformation rate 5.0 x 10 -2 min -1
Creep strength - 1% elongation in 1000 h
Temperature °C
800
1000
MPa
20
4
Density g/cm3
7.90
Electrical resistivity at 20°C Ω mm2/m
1.04
Temperature factor of resistivity
Temperature °C
100
200
300
400
500
600
700
800
900
1000
1100
Ct
1.03
1.06
1.10
1.12
1.15
1.17
1.19
1.21
1.22
1.23
1.24
Coefficient of thermal expansion
Temperature °C
Thermal Expansion x 10-6/ K
20 - 250
16
20 - 500
17
20 - 750
18
20 - 1000
19
Thermal Conductivity
Temperature °C
20
100
200
300
400
500
600
700
800
900
1000
1100
W m-1 K-1
13
14
15
16
18
19
21
22
24
25
26
28
Specific heat capacity
Temperature °C
20
100
200
300
400
500
600
700
800
900
1000
1100
kJ kg-1 K-1
0.50
0.50
0.50
0.51
0.54
0.57
0.60
0.62
0.64
0.67
0.70
0.73
Melting point °C
1390
Max continuous operating temperature in air °C
1100
Magnetic properties
The material is non-magnetic.
Emissivity - fully oxidized material
0.88
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®.
