48NiFe is an iron-nickel controlled expansion alloy suitable to soft glass sealing, with optimal chemical composition to obtain hermetic seals. Typical applications are hermetic feedthroughs and electron gun components.
Chemical composition
Iron Fe Bal. | Nickel Ni 48.0% |
Element, % | Min % | Max % |
Ni | 48.0 | – |
Fe | – | Balance |
Mechanical property
Alloy State | Tensile Strength, N/mm² |
Yield Strength, N/mm² |
Elongation, % |
Annealed | 540.00 | 270.00 | 30.00 |
Hard | 740.00 | 710.00 | 5.00 |
Physical properties
Density (g/cm3) |
Resistivity at 20 oC (μohm.cm) |
Melting To (oC) |
Curie To (oC) |
Specific Heat (J/g oC) |
Termal Conductivity at 20 oC (W/m/oC) |
8.20 | 50.0 | 1425.0 | 450.0 | 0.5 | 16.0 |
Characteristics
- Low Coefficientof thermal expansion
- High Inflection Point
- Good Magnetic Properties
Applications
- Industrial thermostat sticks
- Radio valves
- Lighting Lamps