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® 30 is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1050°C (1920°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® 30 are solid hot plates, open coil heaters in HVAC systems, night-storage heaters, convection heaters, heavy duty rheostats and fan heaters. Nikrothal® 30 is also used for heating cables and rope heaters in defrosting and de-icing elements, electric blankets and pads, car seats, baseboard heaters, floor heaters and resistors.
C %
Si %
Mn %
Cr %
Ni %
Fe %
Trace Elements
Nominal composition
Bal.
Added
Min
1.6
20.0
30.0
Max
0.15
2.5
1.0
22.0
33.0
Wire size
Yield strength
Tensile strength
Elongation
Hardness
Ø
Rp0.2
Rm
A
mm
inch
MPa
kpsi
MPa
kpsi
%
HV
1.0
0.04
340
49.3
675
97.9
35
180
4.0
0.16
300
43.5
650
94.3
30
160
Mechanical properties at elevated temperature
Temperature °C
900
MPa
72
Ultimate tensile strength - deformation rate 5.0 x 10-2/min
Density
g/cm3
7.80
lb/in3
0.282
Electrical resistivity at 20°C
Ω mm2/m
1.03
Ω/cmf
620
Temperature factor of resistivity
Temperature °C
100
200
300
400
500
600
700
800
900
1000
Temperature °F
212
392
572
752
932
1112
1292
1472
1652
1832
Ct-value
1.03
1.07
1.11
1.14
1.17
1.19
1.21
1.23
1.24
1.26
Coefficient of thermal expansion
Temperature
Temperature
Thermal Expansion
°C
°F
x 10-6/K
20 - 250
68 - 482
16
20 - 500
68 - 932
17
20 - 750
68 - 1382
18
20 - 1000
20 - 1832
19
Max continuous operating temperature in air
1050°C
1920°F
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®.
