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® 42 is an austenitic nickel-chromium alloy (NiCr-alloy) for use at temperatures up to 1150°C (2100°F). The alloy is characterized by good ductility after use and good corrosion resistance, except in sulphur containing atmospheres and certain controlled atmospheres.
Nikrothal® 42 has an attractive combination of oxidation resistance and form stability making it a suitable alloy for open-coil heating elements.
Typical applications for Nikrothal® 42 are electric heating elements in domestic appliances and other heating equipment
C %
Si %
Mn %
Cr %
Ni %
Fe %
Trace elements
Nominal composition
Bal.
Added
Min
-
1.0
-
19.0
41.5
-
Max
0.10
1.7
1.0
22.0
44
-
Wire size
Yield strength
Tensile strength
Elongation
Hardness
Ø
Rp0.2
Rm
A
mm
MPa
MPa
%
Hv
1.0
340
760
35
180
4.0
300
740
30
160
Density g/cm3
7.96
Electrical resistivity at 20°C Ω mm2/m
1.08
Temperature factor of resistivity
Temperature °C
100
200
300
400
500
600
700
800
900
1000
1100
Ct
1.03
1.07
1.09
1.11
1.13
1.14
1.16
1.17
1.18
1.20
1.21
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
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
0.48
0.48
0.49
0.51
0.54
0.56
0.59
0.61
0.64
0.67
0.69
0.72
Melting point °C
1390
Max continuous operating temperature in air °C
1150
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®.
