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.

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