Title:
LOW-CHROMIUM-CONTENT STAINLESS STEEL WITH EXCELLENT CORROSION RESISTANCE OF WELD
Document Type and Number:
WIPO Patent Application WO/2011/105591
Kind Code:
A1
Abstract:
A stainless steel having an optimal low chromium content is provided in which a weld formed by multipass welding is prevented from deteriorating in corrosion resistance by martensitic transformation and the weld has excellent resistance to intergranular corrosion even in a severe corrosive environment. The heat-affected zones, which adjoin the bonded area, suffer no preferential corrosion. The stainless steel has excellent manufacturability. The low-chromium-content stainless steel contains, in terms of mass%, 0.015-0.025% C, 0.008-0.014% N, 0.2-1.0% Si, 1.0-1.5% Mn, up to 0.04% P, up to 0.03% S, 10-13% Cr, 0.2-1.5% Ni, and 0.005-0.1% Al and further contains Ti in an amount of 6×(C%+N%) to 0.25%, with the remainder comprising Fe and incidental impurities, the contents of the elements satisfying given relationships.
Inventors:
TERAOKA, Shinichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
寺岡 慎一 (〒71 東京都千代田区丸の内二丁目６番１号新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
SAKAMOTO, Shunji (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
寺岡 慎一 (〒71 東京都千代田区丸の内二丁目６番１号新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
SAKAMOTO, Shunji (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2011/054409
Publication Date:
September 01, 2011
Filing Date:
February 21, 2011
Export Citation:
Assignee:
Nippon Steel & Sumikin Stainless Steel Corporation (6-1 Otemachi 2-chome, Chiyoda-ku Tokyo, 04, 〒1000004, JP)
新日鐵住金ステンレス株式会社 (〒04 東京都千代田区大手町二丁目６番１号 Tokyo, 〒1000004, JP)
TERAOKA, Shinichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
寺岡 慎一 (〒71 東京都千代田区丸の内二丁目６番１号新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
新日鐵住金ステンレス株式会社 (〒04 東京都千代田区大手町二丁目６番１号 Tokyo, 〒1000004, JP)
TERAOKA, Shinichi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
寺岡 慎一 (〒71 東京都千代田区丸の内二丁目６番１号新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
International Classes:
C22C38/00; C22C38/50; B21B3/02; B23K9/23; C21D8/02; C21D9/46
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg.,5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)
Claims: