P92 Yield Strength at High Temperatures 1350F-1425F

[jimmyhutmacher]

I'm looking for the yield strength of SA-335 P92 piping in the range of 1350F-1425F. I've searched the Code, the internet and all my sources and can't find anything. Could use some help. Thanks!

 

[metengr]

Your in the tempering range for this CSEF steel. Typically, tensile properties will be useless at service temperature above 1200 deg F, which by the way is the maximum use temperature for this material.

I doubt you will find any information. If you need to estimate the YS, I would use a value of 10 Ksi.

 

[pradipgoswami]

Hi I cant tell about the 1350F-1425F range. However as stated earlier by Metengr, ASME code case 2179-7,January 29, 2009(Seamless 9Cr-2W Material Section I and Section VIII, Division 1,provides Maximum Allowable Stress up to 1200 Deg F.
My understanding :allowable stress up to 1200 Deg F is indicative of the safe application temperature of this steel.

Thanks.

Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist
ca.linkedin.com/pub/pradip-goswami/5/985/299

 

[jimmyhutmacher]

Thanks for the responses. I should've been more clear, the 1350F-1425F isn't for operating or design, it's the temperature range for PWHT. Just need to make sure we don't have any permanent deformation during PWHT.