Title:
HIGH-STRENGTH STEEL MATERIAL FOR STEAM PIPING, AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2012/108027
Kind Code:
A1
Abstract:
A high-strength steel material for steam piping, comprising, in mass%, 0.02-0.15% of C, 0.01-0.60% of Si, 0.5-2.5% of Mn, 0.005-0.05% of Ti, 0.005-0.090% of sol.Al, 0.001-0.009% of N, at least one element selected from Cu in an amount of 0.1-2.0%, Ni in an amount of 0.1-3.0%, Cr in an amount of 0.1-1.0%, Mo in an amount of 0.05-1.0%, V in an amount of 0.01-0.10%, Nb in an amount of 0.005-0.09% and B in an amount of 0.0003-0.0050%, and a remainder made up by Fe and impurities, wherein the content of P is 0.020% or less, the content of S is 0.010% or less, the content of O is 0.005% or less, Pcm (= C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B) is 0.15-0.29, and Fc (= 44-165C-34Si-26Mn-12Cu+85Ni+12Cr+73Mo+13V-77Nb+9900B) is 30 or more.
Inventors:
NAKAMURA HIROFUMI (JP)
OKAGUCHI SHUJI (JP)
OKAGUCHI SHUJI (JP)
Application Number:
PCT/JP2011/052831
Publication Date:
August 16, 2012
Filing Date:
February 10, 2011
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
NAKAMURA HIROFUMI (JP)
OKAGUCHI SHUJI (JP)
NAKAMURA HIROFUMI (JP)
OKAGUCHI SHUJI (JP)
International Classes:
C22C38/00; C21D8/02; C22C38/58
Foreign References:
| JP2008255468A | 2008-10-23 | |||
| JP2003313627A | 2003-11-06 | |||
| JP2007169747A | 2007-07-05 | |||
| JPS56166324A | 1981-12-21 |
Attorney, Agent or Firm:
SUGIOKA, Kanji et al. (JP)
Sugioka Miki 2 (JP)
Sugioka Miki 2 (JP)
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Claims:
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