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:
163 Nickel-Chromium-Iron 12-16-91 Tubing (Alloy 600 and 690) and Nickel-Iron-Chromium Alloy 800 at a Specified Mini mum Yield Strength of 40.0 Ksi and Cold Worked Alloy 800 at a yield strength of 47.0 Ksi, Section III, Division 1, Class 1 2A numerical listing of the Code Cases appears in the appendix. 3When more than one date is given, the earlier date is that on which the Code Case was approved by the ASME, and the later date(s) is that on which the Code Case was reaffirmed by the ASME. 1.85-2 Vt L N-188-1 05-15-78 07-13-81 07-13-84 07-13-87 08-14-90 08-14-93 N-294 08-25-80 05-25-83 07-30-86 07-30-89 07-27-92 N-404 04-05-84 04-05-87 12-11-89 12-11-92 Use of Welded Ni-Fe-Cr-Mo Cu (Alloy 825) and Ni-Cr-Mo Cb (Alloy 625) Tubing, Section III, Division 1, Class 2 and 3 SB-148 Alloy 952 and 954, and SB-62 Alloy 836 Fittings, Section III, Division 1, Class 2 Annealed Alloy UNS N06625 Over UNS N06600 Bimetallic Tubing, Section III, Division 1, Class 1 Code Case N-404 is acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: The outside layer of the bimetal lic tubing should be limited to a minimum of 5 percent and to a maximum of 40 percent of the wall thickness. The tolerance on the outside layer of material should not exceed -0.000 to +0.007 inches of the specified de sign wall thickness. N-418-1 07-30-86 Use of Seamless Ni-Fe-Cr-Mo 07-30-89 Cu Low Carbon (UNS N08028 07-27-92 and UNS N08904) Tubing, Section III, Division 1, Classes 2 and 3 N-439 02-23-87 Use of 20Cr-18Ni-6Mo (Alloy 12-11-89 UNS S31254) Forgings, 12-11-92 Plate, Seamless and Welded Pipe, and Welded Tube, Class 2 and 3 Construction, Section III, Division 1 N-441-1 11-25-92 Use of 20Cr-18Ni-6Mo (Alloy UNS S31254) Fittings, Class 2 and 3 Construction, Section III, Division 1 N-466-1 04-30-90 Modified 9Cr-iMo Material, 02-12-93 Section III, Division 1, Classes 1, 2, and 3 N-502 02-05-92 SA-268, Grade 26-3-3 (UNS S44660) Section III, Division 1, Classes 2