Redi Iron 120 is an austenitic nickel-iron alloy (NiFe alloy) for use at temperatures up to 600°C (1110°F). The alloy is characterized by very low resistivity and high temperature coefficient of resistance.
Typical applications for Redi Iron 120 are in voltage regulators, timing devices, temperature sensitive resistors, temperature compensating devices and low temperature heating applications
Chemical composition
| Ni % | Fe % | |
|---|---|---|
| Nominal composition | 70 | 30 |
Mechanical properties
| Tensile strength Rm |
||
|---|---|---|
| MPa | ksi | |
| Hard | 1034 | 150 |
| Anealed | 483 | 70 |
Physical properties
| Density g/cm3 (lb/in3) | 8.46 (.305) |
|---|---|
| Electrical resistivity at 20°C Ωmm2/m (Ω/cmf) | 0.199 (120) |
| Temperature °C (°F) | Thermal expansion 10 -6/K |
|---|---|
| 20-500 (68-932) | 15.0 |
| Temperature °C (°F) | 100 (212) |
|---|---|
| W m-1 K-1 | 28.9 |
| Temperature °C (°F) | 20 |
|---|---|
| kJ kg-1 K-1 | 0.125 |
| Melting point °C (°F) | 1425 (2597) |
|---|---|
| Max continuous operating temp. °C (°F) | 590 (1094) |
| Magnetic properties | Material is magnetic |
| Thermal E M F vs. Copper mV/°C | -.040 |
