Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
(OP)
Hello,
Does anybody know why SA-479 S21800 (Nitronic 60) is "Not Permitted" for use in ASME VIII-1, per ASME IID Table 1A? It is permitted for Section III, but "NP" for Section I and XII. I need it for its anti-galling properties as part of the pressure boundary in an ASME B31.3 application. I have been trying to find out more background on the reason why it is "NP".
Does anybody know why SA-479 S21800 (Nitronic 60) is "Not Permitted" for use in ASME VIII-1, per ASME IID Table 1A? It is permitted for Section III, but "NP" for Section I and XII. I need it for its anti-galling properties as part of the pressure boundary in an ASME B31.3 application. I have been trying to find out more background on the reason why it is "NP".





RE: Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
RE: Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
Ok thanks for responding. I started looking for Code Cases and found a reference to "Code Case 1817" in reference to this material, so perhaps that has the answer.
RE: Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
RE: Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
Look at the old code case, you may be able to figure out where things went.
You could also look at Nit50.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
RE: Why is Nitronic 60 (SA-479 S21800) NP in VIII-1
Just found that Nitronic 60 is permitted in ASME VIII-1 when purchased as a bolting material conforming to SA-193 B8S. This is listed in Table UHA-23 and also in IID. The MTR from the supplier lists both SA-479 and SA-193 B8S. The A479 version is annealed-only.