Title:
DUPLEX STAINLESS STEEL MATERIAL AND DUPLEX STAINLESS STEEL TUBE
Document Type and Number:
Japanese Patent JP2015078429
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a duplex stainless steel material and a duplex stainless steel tube exhibiting good corrosion resistance and hot workability in an environment containing corrosive substances such as chloride, hydrogen sulfide and carbon dioxide gas.SOLUTION: The duplex stainless steel material containing a ferrite phase and an austenite phase and has a constitution composition containing, C:0.10 mass% or less, Si:0.1 to 2.0 mass%, Mn:0.1 to 2.0 mass%, P:0.05 mass% or less, S:0.01 mass% or less, Al:0.001 to 0.050 mass%, Ni:1.0 to 10.0 mass%, Cr:22.0 to 28.0 mass%, Mo:2.0 to 6.0 mass%, N:0.2 to 0.5 mass%, Ta:0.01 to 0.50 mass% and O:0.030 mass% or less and the balance Fe with inevitable impurities and a ratio of Ta/O of 2.5 or more by mass%.
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Inventors:
KAWAMORI MAKOTO
KINUGASA JUNICHIRO
NISHIZAWA NATSUKI
SATO TOSHIKI
KINUGASA JUNICHIRO
NISHIZAWA NATSUKI
SATO TOSHIKI
Application Number:
JP2014167186A
Publication Date:
April 23, 2015
Filing Date:
August 20, 2014
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
C22C38/00; C21D8/02; C22C38/58
Domestic Patent References:
| JP2012207301A | 2012-10-25 | |||
| JP2012197509A | 2012-10-18 | |||
| JPS61157626A | 1986-07-17 | |||
| JP2013151745A | 2013-08-08 |
Foreign References:
| WO2005014872A1 | 2005-02-17 |
Attorney, Agent or Firm:
Isono Dozo
Etsuo Tada
Tetsuo Tomita
Etsuo Tada
Tetsuo Tomita