Hight strength stainless steel for cryogenic application
Hight strength stainless steel for cryogenic application
(OP)
I am looking for a high strength stainless steel to use for tension rods. The environment is cryogenic, so the material should be austenitic. Standard 304 and 316 grades do not have the strength I need to keep the number of rods to a minimum. I have been looking at XM-19, but it seems to be pretty expensive. Is there a lower cost high strength austenitic stainless steel with a similar yield strength? The rods will be round stock threaded at both ends.
Thanks.
Thanks.





RE: Hight strength stainless steel for cryogenic application
Unless you need the higher corrosion resistance of XM-19 I would suggest 21-6-9, S21904, XM-11 as my first choice.
With a little cold work you can get 125ksi UTS.
I'll hunt for low temp properties on the cold worked material.
Data at low temp on annealed material is commonly available.
It may be strong enough for you.
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Plymouth Tube
RE: Hight strength stainless steel for cryogenic application
Regards,
Mike
RE: Hight strength stainless steel for cryogenic application
RE: Hight strength stainless steel for cryogenic application
What kind of strength level do you need? Annealed 304 and 316 are low strength, but both can be cold worked to considerably higher strength. B8 (304) Class 2 and B8M (316) Class 2 according to ASTM A320 are cold worked to minimum yield strength of 100 ksi for sizes < 3/4".
RE: Hight strength stainless steel for cryogenic application
RE: Hight strength stainless steel for cryogenic application
RE: Hight strength stainless steel for cryogenic application
Jeff
RE: Hight strength stainless steel for cryogenic application
A 304 or 316 that becomes magnetic when cold worked will have reduced toughness at low temperatures.
21-6-9 will stay fully austenitic at 160ksi and has nice properties.
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Plymouth Tube
RE: Hight strength stainless steel for cryogenic application