Ni70Cr30
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.
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 | Thermal Expansion x10-6/K |
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 | - |
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