52 alloy
Designation: .......................................................................................................................ASTMF-30
Composition: ............................................................................................52%Nickel,Balance Iron
Coeffecient of Thermal Expansion: ..........................................................................95 x 10-7 / ºC
Seal Type Recommended Elan Glass Equivalent Glasses
   
Corning GE Kimble  
Matched 11 or 05
9010 - TM-7  
  13 or 09
9013 - TM-5  
  26
- - -  
  65
- - -  
  82
- - R-6  
   
       
Compression 14 or 21
7052 706 EN-1  
  19
- - IN-3  
  28
7070 - KG-33  
  88
- - -  

Material Summary:
No. 52 alloy is the quintessential go-to alloy for compression sealing pin.  It has 52% nickel with iron balance.  Its linear expansion up to 525 C that closely matches that of soft glasses makes it an ideal candidate for Elan 13 and stainless steel housing in a wide range of applications from microwave switches to aerospace electronic seals.