Glass Sealing Alloy Foil (Light Tight) (Fe54/Ni29/Co17)

Formula: Fe 54/Ni 29/Co 17

Form: Foil (Light Tight)

Material: Glass Sealing Alloy

Commodity: Alloys

Light Tight: Light Tight

Hazard Pictogram: GHS07, GHS08

Glass Sealing Alloy Foil (Light Tight) (Fe54/Ni29/Co17) is part of our range of specialty alloys for glass-to-metal seals. With 68 variations available, it provides an airtight, hermetic seal between glass and metal while blocking light transmission. This alloy is designed to match the thermal expansion properties of glass with compositions like iron-nickel-cobalt and nickel-chrome-molybdenum. Applications include vacuum tubes, cathode ray tubes, and other devices requiring robust glass-to-metal interfaces that maintain high electrical resistivity and limit light permeation.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

Health hazard/Hazardous to the ozone layer

Serious health hazard

each

Material Properties for Alloys

Mechanical Properties

Element	Value
Elongation at break( % )	30
Modulus of elasticity( GPa )	207
Tensile strength( MPa )	510-520

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	48.9
Temperature coefficient( K⁻¹ )	0.0037

Magnetic Properties

Element	Value
Curie temperature( C )	435

Thermal Properties

Element	Value
Melting point( C )	1450
Specific heat( J K⁻¹ kg⁻¹ )	439@23°C
Thermal conductivity( W m⁻¹ K⁻¹ )	17.3@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	4.81@20-200°C