Glass Recommendations for Dumet

Glass for Copper-Clad Nickel-Iron 42 Alloy Hermetic Seal

Designation:  
Composition: Copper Clad 42 Alloy
Coefficient of Thermal Expansion: Radial: 92 x 10-7 / °C   Axial: 65 x 10-7 / °C
Seal Type Recommended Elan Glass Equivalent Glasses
  Corning GE Kimble
Compression 11 or 05

13 or 09

26

65

82

9010

9013

  TM-7

TM-5

 

 

R-6

Material Summary:

Dumet is a nickel-iron alloy core with copper cladding. The outer copper layer helps ensure stronger seal as well as reduces bubbling. With the radial expansion of 9.2ppm, Dumet matches very well with Elan 13.

Additional Resources:

Wikipedia: Properties of Dumet / Fernico

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