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:
on 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 and 3 (3) Codes Cases Involving Bars and Forgings 1337-11 05-15-78 Special Type 403 Modified (N-4-11) 07-13-81 Forgings or Bars, Section III, 07-13-84 Division 1, Class 1 and CS 07-13-87 08-14-90 08-14-93 N-370-2 12-05-85 12-05-88 12-16-91 Modified SA-705 Grade XM-13 Forgings, Section III, Division 1 N-469 03-08-89 Martensitic Stainless Steel for 04-30-92 Class 1, 2, and 3 Components, Section III, Division 1 (4) Code Cases Involving General Usage N-60-5 02-15-94 Material for Core Support Structures, Section III, Division 1 Code Case N-60-5 is acceptable subject to the fol lowing condition in addition to those conditions speci fied in the Code Case: Welding of age-hardenable alloy SA-453 Grade 660 and SA-637 Grade 688 should be performed when the material is in the solution-treated condition. The maximum yield strength of strain hardened austenitic stainless steel should not exceed 90,000 psi in view of the susceptibility of this material to environmental cracking. N-71-16 02-12-93 Additional Materials for Sub section NF, Classes 1, 2, 3 and MC Component Supports Fabri cated by Welding, Section III, Division 1 Code Case N-71-16 is acceptable subject to the fol lowing conditions in addition to those conditions speci fied in the Code Case: The maximum measured ulti mate tensile strength (UTS) of the component support material should not exceed 170 Ksi in view of the sus ceptibility of high-strength materials to brittleness and stress corrosion cracking. Certain applications may ex ist where a UTS value of up to 190 Ksi could be consid ered acceptable for a material and, under this condition, the Design Specification should specify impact testing for the material. For these cases, it should be demon strated by the applicant that (1) the impact test results for the material