Material Selection for Glass-to-Metal Seals
A multitude of glass-to-metal seal materials have been
used successfully by Tekna Seal for various hermetic seal
applications. This list is typical, yet not comprehensive.
Many other materials are available upon request for your
specific design.
| Compression |
Housings |
Glass |
Pins |
| High |
1010 Cold
Roll Steel
3xx Stainless Steel
Hastelloy |
Barium
Alkali
Soda Lime
Low Silca |
52 Ni/Fe
Alloy
446 Stainless Steel
Copper cored 52 Ni/Fe alloy
Copper clad 52 Ni/Fe alloy
Molybdenum |
| Low to
Medium |
Stainless
Steel
or Superalloy |
Glass/
Ceramic |
Hastelloy,
Nickel, Copper |
| Matched |
Kovar
42 Ni/Fe Alloy |
Borosilicate
Borosilicate |
Kovar
42 Ni/Fe Alloy |
Plating and Pin Finishes
Plating commonly used on pins to provide solderability
are included in this chart.
|
Plating
|
Solderability
|
|
Nickel
|
Good
|
|
Tin
|
Excellent
|
|
Gold
|
Excellent
|
|
Electroless Nickel
|
Good
|
Configurations
Seals manufactured at Tekna Seal can be produced in a variety of configurations.
Various Pin Configurations
In addition to glass-to-metal seals, tubes
and pins can be brazed metal-to-metal, or metal-to-ceramic.
Hybrid assemblies containing both glass-to-metal and brazed
components may also be produced. Typical applications include
brazing ground leads or evacuation tubes to housing, often
made of dissimilar metals.
 |
1.
Straight
2. Bent
3. Radiused
4. Flattened and Pierced
5. Headed
6. Tubes
7. Custom |
|
