公开(公告)号：USRE33006E

公开(公告)日：1989-08-01

申请号：US71709

申请日：1987-07-08

申请人： Fumio Hataya ,  Masakiyo Izumiya ,  Yoshikuni Ohshima ,  Koichi Akutsu ,  Syuzo Ueda ,  Masaaki Ishikawa ,  Yuji Kusuhara ,  Iwao Shiraishi

发明人： Fumio Hataya ,  Masakiyo Izumiya ,  Yoshikuni Ohshima ,  Koichi Akutsu ,  Syuzo Ueda ,  Masaaki Ishikawa ,  Yuji Kusuhara ,  Iwao Shiraishi

IPC分类号： C22C38/22

CPC分类号： C22C38/22

摘要： A novel low C-Cr-Mo steel having an excellent weldability and a high erosion-corrosion resistance under wet steam, which consists of, in % by weight, 0.02-0.14% of C, not more than 0.90% of Si, 0.30-0.80% of Mn, 0.70-1.60% of Cr, 0.40-0.70% of Mo and the remainder being susbtantially Fe. This novel steel is a very excellent material for fabricating the portions in the feed-water heater, for example, for a nuclear power generation plant, the portions being used under wet steam condition. The above described weldability and erosion-corrosion resistance can be improved, by additionally adding the second components of Cu, N, or B, the third components of Nb or V or the fourth components of Al, Ti or Zr in the respectively defined amounts.