Iron/Nickel Alloy Foil (Fe55/Ni45)

Iron Nickel Alloy Foil (Fe55/Ni45) combines low thermal expansion, high strength, and excellent dimensional stability in a finely rolled foil form. The balanced 55% iron and 45% nickel composition provides enhanced resistance to thermal cycling and maintains mechanical integrity under fluctuating temperatures, making it a key material for precision engineering. Industries such as electronics, aerospace, and optics employ this foil in shadow masks for cathode ray tubes, precision springs, and optical mounts. It also supports advanced technologies like organic light-emitting diode (OLED) substrates, flexible displays, and microcircuit components that demand controlled expansion. In research, it is widely used for developing low-expansion alloys, high-resolution photolithography studies, and functional thin-film architectures. The foil’s uniform thickness, surface smoothness, and reliable mechanical response ensure its importance in high-precision applications where structural stability and repeatable performance are essential, positioning it as a critical enabler in industrial and scientific innovation.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±25%
Thickness	>0.05mm	±10%

Material Properties for Alloys

Magnetic Properties

Element	Value
Initial permeability	6000
Maximum permeability	40000
Coercivity (Hc)( A m⁻¹ )	8
Curie temperature( C )	450
Remanence from saturation (Brem)( T )	1
Saturation Induction( T )	1.6

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	45
Temperature coefficient( K⁻¹ )	-

Thermal Properties

Element	Value
Melting point( C )	1400-1450
Specific heat( J K⁻¹ kg⁻¹ )	460@23°C
Thermal conductivity( W m⁻¹ K⁻¹ )	13@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	7@20-100°C