Low temperature carbon steel.
Low temperature carbon steel.
(OP)
Dear Experts,
I'm designing a system where a reactor is cooled using liquid nitrogen inside a jacket around the reactor. The boilig point of liquid N2 at atmospheric pressure is about -196 deg C. I'm sure that the SS 304/316 could not be used at this low temp. I'm certain, it gotta be low some grade of low temperature carbon steel.
Can you throw some light on the material selection??
Thanks in advance,
Timewrap.
I'm designing a system where a reactor is cooled using liquid nitrogen inside a jacket around the reactor. The boilig point of liquid N2 at atmospheric pressure is about -196 deg C. I'm sure that the SS 304/316 could not be used at this low temp. I'm certain, it gotta be low some grade of low temperature carbon steel.
Can you throw some light on the material selection??
Thanks in advance,
Timewrap.





RE: Low temperature carbon steel.
An austenitic stainless steel like 304/316 is quite suitable for cryogenic service. Is this a reactor a pressure vessel?
RE: Low temperature carbon steel.
The reactor is operating at few pounds gauge pressure, just a little over atmospheric pressure.
I've heard that 304/316 display maximum cryogenic strength at -46 deg C. So, that's not true, up to what temp. these austenitic steels go??
Thanks,
Timewrap.
RE: Low temperature carbon steel.
RE: Low temperature carbon steel.
RE: Low temperature carbon steel.
"Austenitic stainless steels are extensively used for service down to as low as liquid helium temperature (-269 deg C). "
Can I use stainless steel at low temperatures?
http://www.bssa.org.uk/faq.php?id=26
Selection of stainless steels for cryogenic applications
http://www.bssa.org.uk/topics.php?article=41
hope this help
S
Corrosion Prevention & Corrosion Control
RE: Low temperature carbon steel.
For all you valuable posts.
Timewrap
RE: Low temperature carbon steel.
9% Nickel Steel
High strength (100ksi UTS)
Excellent cryogenic toughness to –320F
Note: Weld metal is normally nickel alloy
Nickel content provides
Good hardenability when quenched
Tempering cause reversion of 10-15% of steel to austenite (produces the toughness)
RE: Low temperature carbon steel.
Regards,
Mike