Title:
TWO-PHASE STAINLESS STEEL PIPE AND WELDED FITTING
Document Type and Number:
WIPO Patent Application WO/2022/004526
Kind Code:
A1
Abstract:
This two-phase stainless steel pipe has a chemical composition of: 0.008-0.030 mass% of C; 0.10-0.70 mass% of Si; 0.80-2.60 mass% of Mn; 0.030 mass% or less of P; 0.0001-0.0050 mass% of S; 0.0004-0.0150 mass% O; 0.0001-0.0100 (exclusive of 0.0100) mass% of Sn; 0.10-2.50 mass% of Cu; 2.50-5.50 (exclusive of 2.50) mass% of Ni; 21.5-25.5 mass% of Cr; 0.10-0.50 mass% of Mo; 0.050-0.200 mass% of N; and 0.200 mass% or less of Al, with optional elements, and the balance being Fe and impurities, wherein 4S+8O+Sn is 0.0040-0.0900, and 4S+Sn is 0.0180 or less.
Inventors:
HIRATA HIROYUKI (JP)
AOTA SHOHGO (JP)
YOSHIZAWA MITSURU (JP)
OSUKI TAKAHIRO (JP)
AOTA SHOHGO (JP)
YOSHIZAWA MITSURU (JP)
OSUKI TAKAHIRO (JP)
Application Number:
PCT/JP2021/023808
Publication Date:
January 06, 2022
Filing Date:
June 23, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/58; C21D7/06; C21D9/08
Domestic Patent References:
| WO2019054390A1 | 2019-03-21 | |||
| WO2017141907A1 | 2017-08-24 |
Foreign References:
| JP2019157218A | 2019-09-19 | |||
| JP2017002352A | 2017-01-05 | |||
| CN105441830A | 2016-03-30 | |||
| JP2011168838A | 2011-08-01 |
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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