公开(公告)号：US5820819A

公开(公告)日：1998-10-13

申请号：US697187

申请日：1996-08-20

申请人： Koji Tanabe ,  Hidesato Mabuchi ,  Yukio Tomita ,  Akira Usami ,  Katsutoshi Hashima ,  Hiroshi Kondo ,  Ryuichiro Ebara ,  Yoshikazu Yamada ,  Kazuhide Yamauchi ,  Masuo Matsumoto

发明人： Koji Tanabe ,  Hidesato Mabuchi ,  Yukio Tomita ,  Akira Usami ,  Katsutoshi Hashima ,  Hiroshi Kondo ,  Ryuichiro Ebara ,  Yoshikazu Yamada ,  Kazuhide Yamauchi ,  Masuo Matsumoto

IPC分类号： E04H12/28 ,  C22C38/00 ,  C22C38/28 ,  C22C38/50 ,  C22C38/54 ,  C22C38/14

CPC分类号： C22C38/50

摘要： The present invention has an object to provide a steel for a chimney or a gas duct, which is excellent in pitting resistance and rust adhesion in a corrosive environment caused by combustion waste gas in a plant in which the combustion of natural gas occurs. Pitting resistance and rust adhesion are remarkably improved in the steel of the present invention which steel is prepared by using a 5% Cr steel as the base, while reducing an impurity sulfur to not more than 0.010 wt. %, adding titanium within a range of 0.005 to 0.05 wt. %, and further adding nickel alone within a range of 1.0 to 2.5 wt. %, or adding molybdenum alone within a range of 0.10 to 1.0 wt. %, or adding in combination therewith trace amount of copper or molybdenum within a range of 0.10 to 1.0 wt. %.

摘要翻译： 本发明的目的是提供一种用于烟囱或气体管道的钢，其在由天然气燃烧发生的工厂中的燃烧废气引起的腐蚀环境中具有优异的耐点蚀性和防锈性。 通过使用5％Cr钢作为基底制备钢，本发明的钢中的耐点蚀性和防锈性显着提高，同时将杂质硫还原为不大于0.010重量％。 ％，在0.005〜0.05重量％的范围内添加钛。 ％，进一步在1.0〜2.5重量％的范围内添加镍。 或者在0.10〜1.0重量％的范围内单独添加钼。 ％，或加入其中痕量的铜或钼在0.10〜1.0重量％的范围内。 ％。

公开(公告)号：US5151248A

公开(公告)日：1992-09-29

申请号：US807633

申请日：1991-12-13

申请人： Ryuichiro Ebara ,  Hideo Nakamoto ,  Naohiko Ukawa ,  Tamotsu Yamada ,  Yasuo Nishimura

发明人： Ryuichiro Ebara ,  Hideo Nakamoto ,  Naohiko Ukawa ,  Tamotsu Yamada ,  Yasuo Nishimura

IPC分类号： C22C38/00 ,  C22C30/00 ,  C22C38/40 ,  C22C38/58

CPC分类号： C22C38/40

摘要： An austenitic stainless steel for use for high temperature concentrated sulfuric acid which comprises, on weight basis, 0.04% or less of C, 5-7% of Si, 2% or less of Mn, 15-25% of Cr, 4-24% of Ni, 0.01-1.07% of Pd and the rest consisting of Fe and unavoidable contaminant materials. By the incorporation of small amount of palladium in a basal austenitic stainless steel containing the essential three elements of Cr, Ni and Si, a superior corrosion resistance against highly concentrated high temperature sulfuric acid is attained.