Japan, March 5 -- NIPPON STEEL CORP has got intellectual property rights for 'BOLT.' Other related details are as follows:
Application Number: JP,2021-204949
Category (FI): C21D9/00@B,C22C38/60,C22C38/00,301@Z,C22C38/24
Stage: PROBLEM TO BE SOLVED: To provide a bolt that has high strength and excellent resistance to hydrogen embrittlement.SOLUTION: A bolt according to the present disclosure contains, in mass%, C: 0.30 to 0.50%, Si: 0.01 to 0.30%, Mn: 0.10 to 1.50%, P: 0.030% or less, S: 0.030% or less, Cr: 0.01 to 0.30%, Mo: 1.50 to 2.50%, V: 0.01 to 0.30%, Al: 0.005 to 0.100% and N: 0.0010 to 0.0300%, and the balance being Fe and impurities, and has a tensile strength of 1400 MPa or more, and in which the MC-type carbide in the bolt has a Mo ratio of 60 atom % or more among metal elements excluding Fe.SELECTED DRAWING: Figure 1 (Grant)
Filing Date: Dec. 17, 2021
Publication Date: June 29, 2023
The original document can be viewed at: https://www.j-platpat.inpit.go.jp/p0100
Disclaimer: Curated by HT Syndication.
