Document: NRC Regulatory Guide
Document ID: c6e354c2-cc83-4d3d-b01b-b43865ccdac6
Document Type: regulatory_guide
Title: Control of Ferrite Content in Stainless Steel Weld Metal + HISTORY - HISTORY DG-1279 , Proposed Revision 4, published 09/2012 (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1202/ML12024A004.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.31
CFR Part: 
CFR Title: 

Content:
SME Code acceptable. 3. Instrumentation The weld pad should be examined for ferrite content by using a magnetic measuring instrument that has been calibrated against a Magnegage in accordance with AWS A4.2M, “Standard Procedures for DG-1279, Page 4 Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic and Duplex Ferritic- Austenitic Stainless Steel Weld Metal” (Ref. 6). The Magnegage should have been previously calibrated in accordance with AWS A4.2M using primary standards as defined therein. 4. Acceptability of Test Results Weld pad test results showing an average ferrite number from 5 to 20 indicate that the filler metal is acceptable for the production welding of Class 1, 2, and 3 austenitic stainless steel components, reactor internals, and core support structures. 5. Quality Assurance The applicable provisions of Appendix B to 10 CFR Part 50 should be used to verify compliance with requirements for delta ferrite of each lot and each heat of weld filler metal as described herein. D. IMPLEMENTATION The purpose of this section is to provide information on how applicants and licensees1 may use this guide and information regarding the NRC’s plans for using this regulatory guide. In addition, it describes how the NRC staff complies with the Backfit Rule (10 CFR 50.109) and any applicable finality provisions in 10 CFR Part 52. Use by Applicants and Licensees Applicants and licensees may voluntarily2 use the guidance in this document to demonstrate compliance with the underlying NRC regulations. Methods or solutions that differ from those described in this regulatory guide may be deemed acceptable if they provide sufficient basis and information for the NRC staff to verify that the proposed alternative demonstrates compliance with the appropriate NRC regulations. Current licensees may continue to use guidance the NRC found acceptable for complying with the identified regulations as long as their current licensing basis remains