Title:
耐サワー性に優れた鋼板及びラインパイプ用鋼管
Document Type and Number:
Japanese Patent JP4719313
Kind Code:
B2
Abstract:
Provided are a steel plate excellent in sour resistance and a steel pipe for linepipes. The steel plate and the steel pipe are characterized by containing by mass C: 0.01 to 0.08%, Si: 0.10 to 0.50%, Mn: 1.00 to 1.50%, Ti: 0.005 to 0.030%, Nb: 0.01 to less than 0.04%, Ca: 0.0010 to 0.0040%, P: 0.015% or less, S: 0.0008% or less, O: 0.0020% or less, Al: 0.040% or less, with the balance being Fe and impurities, and are characterized in that the contents (in mass%) of Al and Si satisfy the relationships: Al 0.005% and 0.25% Si, or the relationships: Al > 0.005 and Al + 0.1Si > 0.03% and the contents (in mass%) of S, O, Si, and Ca satisfy the relationships: S/Ca 0.33 and O/Si 0.005.
Inventors:
Mitsuru Sawamura
Taro Muraki
Takuya Hara
Asahi Hitoshi
Taro Muraki
Takuya Hara
Asahi Hitoshi
Application Number:
JP2010515956A
Publication Date:
July 06, 2011
Filing Date:
June 05, 2009
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C38/00; C22C38/14; C22C38/54; C21D8/02
Domestic Patent References:
| JP2006274338A | 2006-10-12 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Manabu Saito
Nakamura Asayuki
Nagasaka Tomoyasu
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Manabu Saito
Nakamura Asayuki
Nagasaka Tomoyasu