Yield stress of 9 chrome at 1375 deg F

You might see if it's documented somewhere in ASME STP-NU-018 - Creep Fatigue Data & Procedures for Gr 91 and Hastelloy XR (Ive looked in ASME STP PT 087 but wasn't able to find it there).

Huub
- You never get what you expect, you only get what you inspect.

Straight 9Cr or 91?
I have pages of data on 2 1/2Cr and on 409/410, but almost nothing on 9Cr.
You might try looking at EPRI guides as well.

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P.E. Metallurgy, consulting work welcomed

Strait 9Cr

I spoke with a buddy of mine that is a metallurgist and another one from a separate client..between them two and the responses I’m getting here…sounds like a no no!

Thanks to all for the comments!

Vry close to lower critical; sounds like a bad idea.

JG... FYI ... when presenting a question like this...

Exactly what material spec was this alloy made per? The spec will define the entire chemistry and processing and provide clarity as to the specific material in question. IF any thing, what is the material UNS???

What is the environment of the exposure??? Air? Combustion-products? Inert gas? Vacuum? Plasma?

Regards, Wil Taylor
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