Title:
SEAMLESS STEEL PIPE FOR STEAM INJECTION, AND METHOD OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2011/114896
Kind Code:
A1
Abstract:
Disclosed is a steel pipe for steam injection, which exhibits high yield stress even at a temperature of 350°C. Specifically disclosed is a seamless steel pipe for steam injection which has a chemical composition that includes, in terms of mass%, 0.03-0.08% C, 0.05-0.5% Si, 1.5-3.0% Mn, more than 0.4 but at most 1.2% Mo, 0.005-0.100% Al, 0.001-0.005% Ca, 0.002-0.015% N, at most 0.03% P, at most 0.01% S and at most 1.5% Cu, with the remainder being Fe and impurities. The seamless steel pipe for steam injection is manufactured via a hot working process, followed by a water cooling process, a quenching process and a tempering process.
Inventors:
ISHIYAMA, Tomoyuki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
石山 知由 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
石山 知由 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
Application Number:
JP2011/054882
Publication Date:
September 22, 2011
Filing Date:
March 03, 2011
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-k, Osaka-shi Osaka 41, 〒5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 Osaka, 〒5410041, JP)
ISHIYAMA, Tomoyuki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜４丁目５番３３号 Osaka, 〒5410041, JP)
ISHIYAMA, Tomoyuki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
International Classes:
C22C38/00; B21B23/00; C21D8/10; C21D9/08; C22C38/16; C22C38/58
Attorney, Agent or Firm:
UEBA Hidetoshi et al. (Intelix International, Aqua Dojima West4-16, Dojimahama 1-chome, Kita-k, Osaka-shi Osaka 04, 〒5300004, JP)
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Claims: