4alloy
Designation: ...................................................................................................
Composition: .......................42%Nickel, 5.5%Chromium,Balance Iron
Coeffecient of Thermal Expansion: .............................90 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. 4 alloy is a nickel-chromium-ferrous alloy that offers excellent chemical resistance.  Another notable characteristic is the chrome oxide layer which provides superior bonding strength.  Using No.4 alloy pin with stainless steel housing and Elan 13 or 48 glass creates a strong hermetic compression seal.