Related Resources: materials
Outgassing Rates Stainless Steels
Outgassing rates of stainless steels, along with the surface treatment and pumping time.
|
Material
|
Treatment
|
Outgassing rate
(torr-L/sec-cm2 ) |
Time meas.
(hours) |
Test
method |
Reference
|
|
Stainless steel
|
None
|
6.4x10-7
|
1h
|
-
|
Schamus (ref Markley, et al)
|
|
Stainless steel
|
degreased
|
4x10-7
|
1h
|
-
|
Schamus (ref Markley, et al)
|
|
Stainless steel
|
None
|
2x10-7
|
1h
|
-
|
Schamus (ref Blears, et al)
|
|
Stainless steel
|
None
|
2x10-8
|
10h
|
-
|
Schamus (ref Blears, et al)
|
|
Stainless steel
NS22S |
Fresh
|
1.4x10-8
|
1h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
ICN 472 |
fresh
|
1.3x10-8
|
1h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
|
None
|
1.2x10-8
|
10h
|
|
Schamus (ref Das, et al)
|
|
Stainless steel
ICN 472 |
sanded
|
8.3x10-9
|
1h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
NS22S |
electro polished
|
4.3x10-9
|
1h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
NS22S |
mechanically polished
|
1.7x10-9
|
1h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
|
fresh
|
1.5x10-9
|
10h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
ICN 472 |
Polished & vapor degreased
|
1.4x10-9
|
10h
|
-
|
Schamus (ref Dayton, et al)
|
|
Stainless steel
|
None
|
1.4x10-9
|
10h
|
-
|
Schamus (ref Das, et al)
|
|
Stainless steel
NS22S |
fresh
|
1.3x10-9
|
10h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
ICN 472 |
sanded
|
1.0x10-9
|
10h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
|
None
|
7.6x10-10
|
1h
|
|
Schamus (ref Das, et al)
|
|
Stainless steel
NS22S |
mechanically polished
|
4.6x10-10
|
10h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
NS22S |
electro polished
|
4.3x10-10
|
10h
|
Conductance
|
Elsey (ref Schram)
|
|
Stainless steel
|
Baked 24h @ 200 ° C
|
1.5x10-10
|
1h
|
-
|
Schamus (ref Das, et al)
|
|
Stainless steel
|
None
|
1.1x10-10
|
100h
|
-
|
Schamus (ref Das, et al)
|
|
Stainless steel 304
|
Degrease + water rinse
|
4.0x10-11
|
40h
|
Conductance
|
Strausser
|
|
Stainless steel
U15C |
Baked 25h @ 300°C
|
4.5x10-12
|
-
|
-
|
Elsey (ref Calder, et al)
|
|
Stainless steel
304 |
Degrease + water rinse,
baked in vacuum 150°C for 12h |
4.0x10-12
|
5h after bakeout
|
Conductance
|
Strausser
|
|
Stainless steel
304 |
Electropolished,
baked 30h @ 250°C |
3.0x10-12
|
-
|
-
|
Elsey (ref Young)
|
|
Stainless steel
U15C |
Baked 45h @ 360°C
|
2.6x10-12
|
-
|
-
|
Elsey (ref Calder, et al)
|
|
Stainless steel
|
Baked 24h @ 200 ° C
|
9.3x10-13
|
100h
|
-
|
Schamus (ref Das, et al)
|
|
Stainless steel
U15C |
Baked 3h in vacuum @
1000°C + 25h in situ @ 360 ° C |
1.6x10-14
|
-
|
-
|
Elsey (ref Calder, et al)
|
Related: Outgassing Rates of Aluminium
Reference: Ferimilab
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