316H Thermal Expansion Coefficient

[EVERFABCHAD]

I need to find out what Thermal Expansion Coefficient for 316H is at 800 egrees Celsius.

Also what other Stainless steels can run at these temps?? No stress environment.

Thanks

Chad

 

[XL83NL]

Coefficient will be (approx.) same as 316. Refer to e.g. ASME B31.3 for values of the coefficient.
Im not sure if 316H is a good material to choose at such temperatures (regardless of the service and service conditions (like pressure).
Refer to API 571 para. 4.2.6, Sigma Phase Embrittlement.

 

[EdStainless]

From what temp to 800C? If you hold it at one temp there will be no expansion.

For ref: all in C, cte in 10e-6/C
0-315 6.2
0-540 17.5
0-650 18.5
0-815 20.0

So for 650-815 the average cte is 25.9 e-6/C
This is very large.

Because of Sigma and other issues you might be better off looking at a Ni alloy.
Maybe start with 625.

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Plymouth Tube

 

[Ripz]

When in doubt, Inco it out.