The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1985
Filed:
Feb. 24, 1982
Fumio Hataya, Hitachi City, Ibaragi Pref., JP;
Masakiyo Izumiya, Mito City, Ibaragi Pref., JP;
Yoshikuni Ohshima, Hitachi City, Ibaragi Pref., JP;
Koichi Akutsu, Toyooka, Tokai-Mura, Naka-Gun, Ibaragi Pref., JP;
Syuzo Ueda, Chiba City, Chiba Pref., JP;
Masaaki Ishikawa, Chiba City, Chiba Pref., JP;
Yui Kusuhara, Nakasho, Kurashiki City, Okayama Pref., JP;
Iwao Shiraishi, Chiba City, Chiba Pref., JP;
Other;
Abstract
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 substantially 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.