Change A479 with A276 for pressure application
Change A479 with A276 for pressure application
(OP)
I was wondering if I could change Change A479 with A276 for pressure application (for SS316L material)? I have been told that A479 is suited for B&PV application and A276 for structural application. Could some one shed light on this topic?
Regards,
bssem
Regards,
bssem





RE: Change A479 with A276 for pressure application
RE: Change A479 with A276 for pressure application
RE: Change A479 with A276 for pressure application
The interesting thing to add here for SS316L is:
1. Section II part D of the B&PV code does not rate SA276 (unlike SA479) for high temperature (pressure) applications.
2. The properties of the two specs. are so much alike (only the elongation for certian sizes of SA276 is precribed at a higher value).
How can one differentiate b/w the two? How can these spec. be so different - see 1 above and so alike see 2 above at the same time?
bssem
RE: Change A479 with A276 for pressure application
RE: Change A479 with A276 for pressure application
If a solid bar is bored out and used to contain pressure, does it need to be SA479, or doesn't it matter? And if it does need to be SA479, how does someone know that from reading either of these specs? Certainly one can't simply assume an intended purpose strictly from a title.
RE: Change A479 with A276 for pressure application
In reviewing the ASME B&PV Code, Section II, Part D, Table IA, the list of materials in this table can be used for pressure boundary applications, like SA 479. Materials not listed in this table are not permitted for use as pressure boundary material. SA 276 is a material that is is permitted for use by ASME B&PV Code, except only as support and trim function, and cannot be used for pressure boundary design applications.
RE: Change A479 with A276 for pressure application
RE: Change A479 with A276 for pressure application
However from the manufacturer of barstock and incomming quality (for machined products) points of view, what is the difference b/w making barstocks to either standard... are they both not hot or cold rolled products?
RE: Change A479 with A276 for pressure application
Good question. If you perform a side by side comparison, you will see the ASME SA 479 provides specific information regarding heat treatment and grain size for austenitic stainless steel grades to assure maximum corrosion resistance in pressure vessel service. Also, review the Supplementary requirements in SA 479 versus none for SA 276.