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1. (WO2013058274) DUPLEX STAINLESS STEEL, DUPLEX STAINLESS STEEL SLAB, AND DUPLEX STAINLESS STEEL MATERIAL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/058274    International Application No.:    PCT/JP2012/076821
Publication Date: 25.04.2013 International Filing Date: 17.10.2012
IPC:
C22C 38/00 (2006.01), C22C 38/58 (2006.01)
Applicants: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION [JP/JP]; 6-1, Otemachi 2-chome, Chiyoda-ku, Tokyo 1000004 (JP)
Inventors: TSUGE Shinji; (JP).
OIKAWA Yuusuke; (JP).
URASHIMA Hiroshi; (JP).
KAJIMURA Haruhiko; (JP)
Agent: SHIGA Masatake; 1-9-2, Marunouchi, Chiyoda-ku, Tokyo 1006620 (JP)
Priority Data:
2011-231352 21.10.2011 JP
2011-266351 06.12.2011 JP
Title (EN) DUPLEX STAINLESS STEEL, DUPLEX STAINLESS STEEL SLAB, AND DUPLEX STAINLESS STEEL MATERIAL
(FR) ACIER INOXYDABLE DUPLEX, BRAME D'ACIER INOXYDABLE DUPLEX ET MATÉRIAU D'ACIER INOXYDABLE DUPLEX
(JA) 二相ステンレス鋼、二相ステンレス鋼鋳片、および、二相ステンレス鋼鋼材
Abstract: front page image
(EN)An embodiment of this duplex stainless steel contains, by mass%, 0.03% or less of C, 0.05 to 1.0% of Si, 0.1 to 7.0% of Mn, 0.05% or less of P, 0.0001 to 0.0010% of S, 0.5 to 5.0% of Ni, 18.0 to 25.0% of Cr, 0.10 to 0.30% of N, 0.05% or less of Al, 0.0010 to 0.0040% of Ca, and 0.01 to 0.2% of Sn, the remainder comprising Fe and unavoidable impurities. The ratio Ca/O between the amounts of Ca and O is 0.3 to 1.0. The pitting index (PI) represented by equation (1) is less than 30. PI = Cr + 3.3Mo + 16N (1)
(FR)Un mode de réalisation de cet acier inoxydable duplex contient, en % en masse, 0,03 % ou moins de C, 0,05 à 1,0 % de Si, 0,1 à 7,0 % de Mn, 0,05 % ou moins de P, 0,0001 à 0,0010 % de Si, 0,5 à 5,0% de Ni, 18,0 à 25,0 % de Cr, 0,10 à 0,30 % de N, 0,05 % ou moins d'Al, 0,0010 à 0,0040 % de Ca et 0,01 à 0,2 % de Sn, le complément comprenant Fe et les impuretés inévitables. Le rapport Ca/O entre les quantités de Ca et O est de 0,3 à 1,0. L'indice de corrosion par piqûres (PI) représenté par l'équation (1) est inférieur à 30. PI = Cr + 3,3 Mo + 16 N (1)
(JA) この二相ステンレス鋼の一態様は、質量%で、C:0.03%以下、Si:0.05~1.0%、Mn:0.1~7.0%、P:0.05%以下、S:0.0001~0.0010%、Ni:0.5~5.0%、Cr:18.0~25.0%、N:0.10~0.30%、Al:0.05%以下、Ca:0.0010~0.0040%、及びSn:0.01~0.2%を含有し、残部がFeおよび不可避的不純物からなり、CaとOの含有量の比率Ca/Oが0.3~1.0であり、(1)式で示す孔食指数PIが30未満である。 PI=Cr+3.3Mo+16N (1)
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)