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Ni70Cr30
(Common Name:Ni70Cr30, Nikrothal 70, N7, HAI-NiCr 70, Chromel 70/30, Resistohm 70, Balco,Tophet 30,Cronix 70,Alloy 710,Stablohm 710)
Ni70Cr30 is a nickel-chromium alloy (NiCr alloy) characterized byHigh resistivity, good oxidation resistance,very good form stability,good ductility and excellent weldability. It is suitable for use at temperatures up to 1250°C.
Typical applications for Ni70Cr30 are used in electrical heating elements in industrial furnace,and well suited for reducing atmospheres.
Normal composition%
|
C |
P |
S |
Mn |
Si |
Cr |
Ni |
Al |
Fe |
Other |
|
Max |
|||||||||
|
0.05 |
0.02 |
0.015 |
0.60 |
0.75~1.60 |
28.0~31.0 |
Bal. |
Max 0.50 |
Max 1.0 |
- |
Typical Mechanical properties（1.0mm）
|
Yield strength |
Tensile Strength |
Elongation |
|
Mpa |
Mpa |
% |
|
430 |
820 |
30 |
Typical Physical properties
|
Density (g/cm3) |
8.2 |
|
Electrical resistivity at 20℃(Ωmm2/m) |
1.18 |
|
Conductivity coefficient at 20℃ (WmK) |
14 |
|
Coefficient of thermal expansion |
|
|
Temperature |
Coefficient of Thermal Expansion x10-6/℃ |
|
20 ℃- 1000℃ |
17 |
|
Specific heat capacity |
|
|
Temperature |
20℃ |
|
J/gK |
0.46 |
|
Melting point (℃) |
1380 |
|
Max continuous operating temperature in air (℃) |
1250 |
|
Magnetic properties |
non-magnetic |
Temperature Factors Of Electrical Resistivity
|
20℃ |
100℃ |
200℃ |
300℃ |
400℃ |
500℃ |
600℃ |
|
1 |
1.007 |
1.016 |
1.028 |
1.038 |
1.044 |
1.036 |
|
700℃ |
800℃ |
900℃ |
1000℃ |
1100℃ |
1200℃ |
1300℃ |
|
1.03 |
1.028 |
1.029 |
1.033 |
1.037 |
1.043 |
- |
Style of supply
|
Alloys Name |
Type |
Dimension |
||
|
Ni70Cr30W |
Wire |
D=0.03mm~8mm |
||
|
Ni70Cr30R |
Ribbon |
W=0.4~40 |
T=0.03~2.9mm |
|
|
Ni70Cr30S |
Strip |
W=8~250mm |
T=0.1~3.0 |
|
|
Ni70Cr30F |
Foil |
W=6~120mm |
T=0.003~0.1 |
|
|
Ni70Cr30B |
Bar |
Dia=8~100mm |
L=50~1000 |
|
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