Helical Compression Springs in Hydrogen Service

[Sullivan4874]

What are the recommended materials for wetted helical compression springs in hydrogen service? I've read that Elgiloy and MP35N are good. What about Inconel X-750 with precipitation heat treatment (4 hours @ 1200F)? Any others?

Thanks!

 

[WKTaylor]

'Hydrogen service'...

Room temp? High temp? Cryogenic?

Pure H2... or compounds of hydrogen H**['sour']?

Regards, Wil Taylor
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[Sullivan4874]

Pressure - up to 1500 psi
Temperature - 0 to 120F
Hydrogen concentration - 5% to 100% with the balance being clean natural gas

Thanks!

 

Inconel 718 might also be an option. It is used for critical fasteners in nuclear, so it has been studied to death.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."