Document: NRC Regulatory Guide
Document ID: 44b58049-ac63-457b-a075-ef162b34cb70
Document Type: regulatory_guide
Title: Materials code case Acceptability - - ASME Section III, Division 1 (Rev. 31)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740365.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.85
CFR Part: 
CFR Title: 

Content:
c tion III, Division 1 Code Case N-249-12 was acceptable subject to the following conditions in addition to those conditions specified in the Code Case: the fracture toughness re quirements apply only to piping supports and not to Classes 1, 2, and 3 component supports. The fracture toughness of Classes 1, 2, and 3 component supports should be characterized in accordance with paragraph 5.3.4 of the USNRC Standard Review Plan (NUREG 0800) or on a case-by-case basis. The following is to be added to paragraph (e) of the Case: For these cases, is should be demonstrated by the owner that (1) the im pact test results for the material meet Code require ments and (2) the material is not subject to stress corro sion cracking by virtue of the fact that (a) a corrosive environment is not present and (b) the component that contains the material has essentially no residual stresses or assembly stresses, and it does not experience frequent sustained loads in service. N-26519 01-07-80 09-01-83 12-31-84 05-19-85 N-299 11-17-80 11-28-83 07-18-85 N-321 07-13-81 07-13-84 12-05-85 N-337 04-02-82 05-19-85 07-18-85 Modified SA-487 Castings, Section III, Division 1, Class 1 Use of Nickel-Chromium Molybdenum-Columbium Alloy 625 Forgings, Section III, Division 1, Class 2 and Class 3 Components Use of Modified SA-249, Type 304 for Section III, Division 1, Class 1 Construction Use of ASTM B525-70 Grade II, Type II, Sintered Austenitic Stainless Steel for Class 2, 3, and MC Component Standard Supports, Section III, Division 1 N-352 07-16-82 05-19-85 07-18-85 Use of SA-638 Grade 660 Forgings and Bars Below 7000 F Without Stress Rupture Tests, Section III, Division 1 N-370 02-14-83 Modified SA-705 Grade 07-18-85 XM-13 Forgings, Section III, Division 1 N-370-1 07-18-85 Modified SA-705 Grade 12-05-85 XM-13 Forgings, Section III, Division 1 N-371 02-14-83 12 Cr-1W-lMo-1/4V Marten 07-18-85 sitic Stainless Steel Valve In ternals, Section III, Division 1 N-379 04-04-83 Bimetallic Tubing Section III,