Title:
STEEL MATERIAL USED AS MATERIAL FOR FASTENING MEMBER, AND FASTENING MEMBER
Document Type and Number:
WIPO Patent Application WO/2023/223409
Kind Code:
A1
Abstract:
Provided is a steel material having excellent corrosion resistance and hydrogen embrittlement resistance. A steel material according to the present disclosure comprises: 0.15-0.45 mass% of C; 0.01-1.00 mass% of Si; 0.01-1.50 mass% of Mn: at most 0.050 mass% of P; at most 0.050 mass% of S; at most 0.100% of Al; 0.02-0.30 mass% of Sn; at most 0.20 mass% of Cr; 0.010-0.500 mass% of Cu; 0.01-0.50 mass% of Ni; 0.01-0.50 mass% of Mo; 0.0001-0.100 mass% of Ti; a total of 0.0013-0.0065 mass% (exclusive of 0.0065) of at least one selected from the group consisting of Co, Sb, Ge and In; at most 0.010 mass% of N; and at most 0.015 mass% of O, with the balance consisting of Fe and impurities, and satisfies expression (1). (1) 23<10×LN(Cu+0.5×Sn+2,000×Tx)+100×(0.5×Ni+Mo)3-100×(0.5×Ni+Mo)2+30×(0.5×Ni+Mo)+10<39
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Inventors:
SUGAE KIYONOBU (JP)
MATSUI NAOKI (JP)
SHIGA AKIRA (JP)
TAKABATAKE YU (JP)
MATSUI NAOKI (JP)
SHIGA AKIRA (JP)
TAKABATAKE YU (JP)
Application Number:
PCT/JP2022/020477
Publication Date:
November 23, 2023
Filing Date:
May 17, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D9/00; C22C38/00; C22C38/54
Domestic Patent References:
| WO2020162616A1 | 2020-08-13 | |||
| WO2020203158A1 | 2020-10-08 |
Foreign References:
| JP2019218584A | 2019-12-26 |
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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