Document: NRC Regulatory Guide
Document ID: 08cebcdf-2e81-4e08-a508-9f6b4701c0a5
Document Type: regulatory_guide
Title: Design, Fabrication, and Materials Code Case Acceptability, ASME Section III (Rev. 40)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2219/ML22195A282.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.84
CFR Part: 
CFR Title: 

Content:
rial; under this condition, the design specification should specify impact testing for the material. For these cases, the applicant should demonstrate that (1) the impact test results for the material meet Code requirements and (2) the material is not subject to stress-corrosion cracking because a corrosive environment is not present and because the component that contains the material has essentially no residual stresses or assembly stresses and it does not experience frequent sustained loads in service. The last sentence of Paragraph 5.3 of the Code Case should reference Paragraph 4.5.2.2 of the AWS D.1.1 Code for the evidence presented to and accepted by the authorized inspector concerning exposure of electrodes for longer periods of time. 6/17/82 2/14/83 DG-1405, Page 40 CODE CASE NUMBER TABLE 5 CODE CASES THAT HAVE BEEN SUPERSEDED BY REVISED CODE CASES ON OR AFTER JULY 1, 1974 REVISION DATE N-71-12 Additional Materials for Component Supports Fabricated by Welding, Section III, Division 1, Class 1, 2, 3 and MC The maximum measured UTS of the component support material should not exceed 170 ksi in view of the susceptibility of high-strength materials to brittleness and stress-corrosion cracking. Certain applications may exist where a UTS value of up to 190 ksi could be considered acceptable for a material; under this condition, the design specification should specify impact testing for the material. For these cases, the applicant should demonstrate that (1) the impact test results for the material meet Code requirements and (2) the material is not subject to stress-corrosion cracking because a corrosive environment is not present and because the component that contains the material has essentially no residual stresses or assembly stresses and it does not experience frequent sustained loads in service. The last sentence of Paragraph 5.3 of the Code Case should reference Paragraph 4.5.2.2 of the AWS D.1.1 Code for the evidence presented to and accepted by the