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1. WO2022004526 - TWO-PHASE STAINLESS STEEL PIPE AND WELDED FITTING

Publication Number WO/2022/004526
Publication Date 06.01.2022
International Application No. PCT/JP2021/023808
International Filing Date 23.06.2021
IPC
C22C 38/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/58 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
58with more than 1.5% by weight of manganese
C21D 7/06 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
7Modifying the physical properties of iron or steel by deformation
02by cold working
04of the surface
06by shot-peening or the like
C21D 9/08 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
08for tubular bodies or pipes
Applicants
  • 日本製鉄株式会社 NIPPON STEEL CORPORATION [JP]/[JP]
Inventors
  • 平田 弘征 HIRATA, Hiroyuki
  • 青田 翔伍 AOTA, Shohgo
  • 吉澤 満 YOSHIZAWA, Mitsuru
  • 小薄 孝裕 OSUKI, Takahiro
Agents
  • 特許業務法人ブライタス BRIGHTAS IP ATTORNEYS
Priority Data
2020-11267130.06.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) TWO-PHASE STAINLESS STEEL PIPE AND WELDED FITTING
(FR) TUYAU EN ACIER INOXYDABLE À DEUX PHASES ET RACCORD SOUDÉ
(JA) 二相ステンレス鋼管および溶接継手
Abstract
(EN) This two-phase stainless steel pipe has a chemical composition of: 0.008-0.030 mass% of C; 0.10-0.70 mass% of Si; 0.80-2.60 mass% of Mn; 0.030 mass% or less of P; 0.0001-0.0050 mass% of S; 0.0004-0.0150 mass% O; 0.0001-0.0100 (exclusive of 0.0100) mass% of Sn; 0.10-2.50 mass% of Cu; 2.50-5.50 (exclusive of 2.50) mass% of Ni; 21.5-25.5 mass% of Cr; 0.10-0.50 mass% of Mo; 0.050-0.200 mass% of N; and 0.200 mass% or less of Al, with optional elements, and the balance being Fe and impurities, wherein 4S+8O+Sn is 0.0040-0.0900, and 4S+Sn is 0.0180 or less.
(FR) Tuyau en acier inoxydable à deux phases présentant la composition chimique suivante : 0,008-0,030 % en masse de C ; 0,10-0,70 % en masse de Si ; 0,80-2,60 % en masse de Mn ; 0,030 % en masse ou moins de P ; 0,0001-0,0050 % en masse de S ; 0,0004-0,0150 % en masse de O ; 0,0001-0,0100 (à l'exclusion de 0,0100) % en masse de Sn ; 0,10-2,50 % en masse de Cu ; 2,50-5,50 (à l'exclusion de 2,50) % en masse de Ni ; 21,5-25,5 % en masse de Cr ; 0,10-0,50 % en masse de Mo ; 0,050-0,200 % en masse de N ; et 0,200 % en masse ou moins d'Al, avec des éléments facultatifs, et le reste étant constitué de Fe et d'impuretés, 4S + 8O + Sn étant égal à 0,0040-0,0900, et 4S + Sn étant égal ou inférieur à 0,0180.
(JA) 化学組成が、質量%で、C:0.008~0.030%、Si:0.10~0.70%、Mn:0.80~2.60%、P:0.030%以下、S:0.0001~0.0050%、O:0.0004~0.0150%、Sn:0.0001%以上0.0100%未満、Cu:0.10~2.50%、Ni:2.50超5.50%以下、Cr:21.5~25.5%、Mo:0.10~0.50%、N:0.050~0.200%、Al:0.200%以下、任意元素、残部:Feおよび不純物であり、4S+8O+Snが0.0040~0.0900であり、および4S+Snが0.0180以下である、二相ステンレス鋼管。
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