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Title:
AUSTENITIC HEAT-RESISTANT ALLOY AND WELDED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2017/002523
Kind Code:
A1
Abstract:
Provided is an austenitic heat-resistant alloy capable of stably achieving excellent crack resistance and high-temperature strength. This austenitic heat-resistant alloy has a chemical composition including, in mass%, 0.04-0.14% C, 0.05-1% Si, 0.5-2.5% Mn, equal to or less than 0.03% P, less than 0.001% S, 23-32% Ni, 20-25% Cr, 1-5% W, 0.1-0.6% Nb, 0.1-0.6% V, 0.1-0.3% N, 0.0005-0.01% B, 0.001-0.02% Sn, equal to or less than 0.03% Al, equal to or less than 0.02% O, 0-0.5% Ti, 0-2% Co, 0-4% Cu, 0-4% Mo, 0-0.02% Ca, 0-0.02% Mg, 0-0.2% REM, and Fe and impurities as the remainder, and the austenitic heat-resistant alloy has a structure having a crystal grain size of equal to or greater than 2.0 to less than 7.0 in terms of grain size number as defined by ASTM E112.

Inventors:
HIRATA HIROYUKI (JP)
SEMBA HIROYUKI (JP)
JOTOKU KANA (JP)
ISEDA ATSURO (JP)
ONO TOSHIHIDE (JP)
TANAKA KATSUKI (JP)
Application Number:
PCT/JP2016/066458
Publication Date:
January 05, 2017
Filing Date:
June 02, 2016
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C22C38/58
Domestic Patent References:
WO2012176586A12012-12-27
Foreign References:
JP2014047409A2014-03-17
JP2006307313A2006-11-09
JP2004250783A2004-09-09
JPH05195127A1993-08-03
Other References:
See also references of EP 3318650A4
Attorney, Agent or Firm:
UEBA, Hidetoshi et al. (JP)
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