Austenite Based Heat Resistant Alloy Member

Abstract: This austenite-based heat-resistant alloy member has a chemical composition containing, in mass%, 0.010-0.150% of C, 2.00% or less of Si, 2.00% or less of Mn, 0.0400% or less of P, 0.0100% or less of S, 20.00-28.00% of Cr, 35.00-50.00% of Ni, 4.00-10.00% of W, 0.01-1.20% of Ti, 0.01-1.00% of Nb, 0.0200% or less of N, 0.010-0.300% of Al, 0.0005-0.0400% of B, and 0.0100% or less of O, the remaining portion being Fe and impurities, and satisfies 97.50=(Cr+W+Fe+Ni)-(CrER+WER+FeER+NiER) and -2.2×10-5×t3+2.1=D.

Patent Information

Application #

Filing Date

10 September 2025

Publication Number

40/2025

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. HAMAGUCHI, Tomoaki

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

2. OTAKI, Nao

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

3. TANAKA, Katsuki

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

Specification

Documents

Application Documents

#	Name	Date
1	202517085864-STATEMENT OF UNDERTAKING (FORM 3) [10-09-2025(online)].pdf	2025-09-10
2	202517085864-REQUEST FOR EXAMINATION (FORM-18) [10-09-2025(online)].pdf	2025-09-10
3	202517085864-PROOF OF RIGHT [10-09-2025(online)].pdf	2025-09-10
4	202517085864-POWER OF AUTHORITY [10-09-2025(online)].pdf	2025-09-10
5	202517085864-FORM 18 [10-09-2025(online)].pdf	2025-09-10
6	202517085864-FORM 1 [10-09-2025(online)].pdf	2025-09-10
7	202517085864-FIGURE OF ABSTRACT [10-09-2025(online)].pdf	2025-09-10
8	202517085864-DECLARATION OF INVENTORSHIP (FORM 5) [10-09-2025(online)].pdf	2025-09-10
9	202517085864-COMPLETE SPECIFICATION [10-09-2025(online)].pdf	2025-09-10