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Invar® Disk

Invar® disks are made from a nickel-iron alloy with a very low coefficient of thermal expansion and high strength. They’re commonly used in precision instruments and devices where dimensional stability is critical, such as optics, electronics and aerospace applications. With minimal thermal expansion, Invar allows for consistent performance across a wide temperature range. Goodfellow offers Invar® disks in a choice of sizes to suit different design requirements.
Formula: Fe64/Ni36
Temper: Half Hard
Thickness: 0.125mm
Diameter: 28.5mm
UOM Code: 129-737-15
SKU: 1000037359
Product Code: FE02-FL-000165

Tolerances

Disk
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%

Health hazard/Hazardous to the ozone layer

Serious health hazard

Tolerances

Disk
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Technical Data Sheet
Safety Data Sheet
$125.10
each
  • Buy 5 for $101.33 each and save 19%
  • Buy 10 for $92.57 each and save 26%
No Minimum order Despatch of products in stock within 48 hours Free technical support *Free delivery worldwide

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Material Properties for Alloys

Mechanical Properties
Element Value
Hardness - Brinell 160
Elongation at break( % ) 45
Modulus of elasticity( GPa ) 140-150
Tensile strength( MPa ) 450-590
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 75-85
Magnetic Properties
Element Value
Curie temperature( C ) 279
Thermal Properties
Element Value
Melting point( C ) 1427
Specific heat( J K⁻¹ kg⁻¹ ) 515@23°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 13@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 1.7-2@20-90°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8
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