Interested in learning more?
Bimetallic – CF – Flanges
for UHV Aluminum vacuum systems
Princeton Scientific can provide Aluminum chambers with inhouse developed Bi-metal-flanges. Different material combinations are available.
Bi-Metal-flanges are also available as semi-finished products.
Specification
These flanges are fully compatible with industry standard CF – Flanges. The combination of these two materials allow for welding on Aluminum vacuum chambers and features stainless steel knife‐edge. Aluminum is becoming more popular in the vacuum branche: Very low outgassing rate, non magnetic and high material removing by machining. These material properties in combination with the stainless steel CF – contour creates a reliable solution for every vacuum requirement.
Material
The vacuum‐proof connection between Aluminum and stainless steel is realized by a special kind of pressure welding. Following alloy combinations are possible:
| Aluminium: | EN AW 5754 |
|---|---|
| Stainless Steel: | 1.4301, 1.4404, 1.4429 ESU |
Mechanical
| Bending‐Test butt joint | 170° without cracks |
|---|---|
| Tensile‐Test butt joint | Material failure in aluminum |
Helium Leak Test
Q < 1 x 10−9 mbar l/s
Thermal
| max. bakeout temperature: | +250 °C |
|---|---|
| min. operational temperature: | -196 °C |
Physical
| Permeability joint | 1, 005 |
|---|
| Art.-Nr. | DN | D | L | DA | A | s | L1 | ||
|---|---|---|---|---|---|---|---|---|---|
| 304 | 316L | 316LNS | |||||||
| FSW-SW40T-304 | FSW-SW40T-316L | FSW-SW40T-316LNS | 40 | 30 | 40-120 | 33 | 70 | 1,5 | 13 |
| FSW-SW63T-304 | FSW-SW63T-316L | FSW-SW63T-316LNS | 63 | 57,2 | 48-120 | 61,2 | 113,5 | 2 | 17,5 |
| FSW-SW100T-304 | FSW-SW100T-316L | FSW-SW100T-316LNS | 100 | 93,4 | 50-120 | 99,3 | 152 | 2,95 | 20 |
| FSW-SW150T-304 | FSW-SW150T-316L | FSW-SW150T-316LNS | 150 | 144,1 | 52-120 | 150,1 | 203 | 3 | 22 |
| FSW-SW200T-304 | FSW-SW200T-316L | FSW-SW200T-316LNS | 200 | 194,9 | 55-120 | 200,9 | 253 | 3 | 25 |
| FSW-SW300T-304 | FSW-SW300T-316L | FSW-SW300T-316LNS | 300 | 298,8 | 58-80 | 305 | 368,3 | 3 | 28 |
- Cleaned according to UHV
- Other dimensions on request
- Customized flanges on request
- Option: With threads
