Two Phase Stainless Steel Welded Joint

Abstract: Provided is a two-phase stainless steel welded joint that can suppress undercut and has superior fatigue characteristics. This two-phase stainless steel welded joint comprises: a parent material; and a weld metal that comprises, by mass%, C: 0.001%-0.030%, Si: 0.05%-0.70%, Mn: 0.05%-0.85%, P: 0.030% or less, S: 0.0030% or less, Cr: 21.00%-28.00%, Ni: 5.00%-11.00%, Mo: 2.00%-4.50%, Cu: 0.01-4.00%, Sol. Al: 0.0010-0.0500%, N: 0.080%-0.400%, and B: 0.0001-0.0100%, the remainder consisting of Fe and unavoidable impurities, wherein in addition to the respective contents of each of the elements in the weld metal and the parent material being satisfied, mathematical expression (1) and mathematical expression (2) are also satisfied. (1): Si+3Mn=3.00 (2): 0

Patent Information

Application #

Filing Date

26 October 2023

Publication Number

37/2024

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. OSUKI, Takahiro

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

2. AOTA, Shohgo

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

3. IZAWA, Takahiro

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

4. KURIHARA, Shinnosuke

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

#	Name	Date
1	202317072787-STATEMENT OF UNDERTAKING (FORM 3) [26-10-2023(online)].pdf	2023-10-26
2	202317072787-REQUEST FOR EXAMINATION (FORM-18) [26-10-2023(online)].pdf	2023-10-26
3	202317072787-PROOF OF RIGHT [26-10-2023(online)].pdf	2023-10-26
4	202317072787-POWER OF AUTHORITY [26-10-2023(online)].pdf	2023-10-26
5	202317072787-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [26-10-2023(online)].pdf	2023-10-26
6	202317072787-FORM 18 [26-10-2023(online)].pdf	2023-10-26
7	202317072787-FORM 1 [26-10-2023(online)].pdf	2023-10-26
8	202317072787-FIGURE OF ABSTRACT [26-10-2023(online)].pdf	2023-10-26
9	202317072787-DRAWINGS [26-10-2023(online)].pdf	2023-10-26
10	202317072787-DECLARATION OF INVENTORSHIP (FORM 5) [26-10-2023(online)].pdf	2023-10-26
11	202317072787-COMPLETE SPECIFICATION [26-10-2023(online)].pdf	2023-10-26
12	202317072787-FORM 3 [19-04-2024(online)].pdf	2024-04-19