48NiFe


Overview

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