Document: NUREG-0800
Document ID: 2c1e60ee-a3b4-4f26-8ebd-56dc7a8435b6
Document Type: srp
Title: THREADED FASTENERS ! ASME CODE CLASS 1, 2, AND
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550058.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.13
CFR Part: 
CFR Title: 

Content:
tive materials selected for the threaded fasteners and compare with any precedents set forth and accepted in prior staff reviews. The reviewer should provide a rationale for accepting or rejecting any material that has been proposed as an alternative to the mandated material selection criteria. RG 1.65 provides an acceptable NRC position with respect to criteria for selecting materials for Reactor Vessel (RV) closure studs. The criteria of Position C.1 are consistent with, but more limited in scope, than the corresponding material specifications that are presented under ASME Section III, NB-2128. Class 2 and 3 Applications: ASME Code, Section III, Paragraphs NCA-1220 and NC-2128, provide the material selection criteria for threaded fasteners used in Class 2 applications. The criteria for selecting bolt materials for ASME Code Class 3 applications are specified in Paragraphs NCA-1220 and ND-2128. Paragraphs NC-2128 and ND-2128 provide that the bolting materials should conform to one of the specifications listed in Table 3 of ASME Section II, Part D, Subpart 1. The materials used for nuts should conform to either SA-194 or to one of the specifications listed in Table 3 of Subpart 1. B. Mechanical Testing, Special Process and Controls The criteria for mechanical property testing of threaded fastener materials are identified in the specification of ASME Code, Section II, Part A. The reviewer should verify that the applicant has specified the appropriate mechanical tests in accordance with Part A for each type of threaded fastener. Table 3.13-1 identifies the appropriate section of the ASME Code relative to material heat treatment and tensile test coupon preparation criteria for ferritic materials (i.e., carbon steel, low-alloy steel, quenched and tempered steel). The applicant 3.13-10 March 2007 should apply criteria of ASME Code, Section III, Subparagraphs NB-2200, NC- 2200, ND-2200 rather than the criteria of the material specification applicable to the mechanical