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Missing Stress Values in ASME II Part D
2

Missing Stress Values in ASME II Part D

Missing Stress Values in ASME II Part D

(OP)
I had an enquiry from client where the shell material is requested to be: ASME-SA387 Gr9 Class 2 UNS K90941
This material exists under its own specification in ASME II Part A but no Stress values seem to be shown in ASME II Part D. The only closest thing available as plate is SA387 Gr 91 Class 2 UNS K90901.
There is a little difference in chemical composition between both alloys but why aren't stress values available for Gr.9 Class 2?
What could be the reason?

Many thanks!

RE: Missing Stress Values in ASME II Part D

The material is not approved for use when the stress values are not listed in ASME Section II, Part D

If your Code of Construction is ASME Section VIII, Division 1, go to UCS-6 and Table UCS-23. If your material is not listed in the table, then it is not an approved material.

RE: Missing Stress Values in ASME II Part D

(OP)
Many thanks!
Highly appreciated!

RE: Missing Stress Values in ASME II Part D

There's one alternative (and one only AFAIK); ASME BPV Code Cases.
As far as I can tell, UNS K90941 isnt in the 2013 edition of the BPV. However, SA387 is covered in Code Case 2576 and 2630. You might want to review those.

RE: Missing Stress Values in ASME II Part D

(OP)
Thanks XL83NL!

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