EP0566814B1 - Superduplex stainless steel having high corrosion resistance and high yield strength in the solution annealed condition - Google Patents
Superduplex stainless steel having high corrosion resistance and high yield strength in the solution annealed condition Download PDFInfo
- Publication number
- EP0566814B1 EP0566814B1 EP92830586A EP92830586A EP0566814B1 EP 0566814 B1 EP0566814 B1 EP 0566814B1 EP 92830586 A EP92830586 A EP 92830586A EP 92830586 A EP92830586 A EP 92830586A EP 0566814 B1 EP0566814 B1 EP 0566814B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- max
- corrosion resistance
- stainless steel
- yield strength
- solution annealed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Revoked
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
Definitions
- Austenitic/Ferritic stainless steels presently on the market are those reported in the ASTM A790 specification with the addition of the Zeron 100, equivalent to UNS S32760, which is not yet included in the ASTM specification.
- the steel grades which are mainly requested for the oil field applications are the UNS S32750 and UNS S32760.
- the invention concerns the production of austenitic-ferritic stainless steel of the superduplex class, manufactured by electrical arc melting and A.O.D. refining.
- the A.O.D. refining allows a deep deoxydation and desulphurization of the steel as well as to reach the required chemical composition in a repeatable way.
- the analytical balancing of the alloying elements Cr, Mo, W, Cu and N is very important for obtaining the mechanical properties and the corrosion resistance on hot forged and/or rolled products in the solu tion annealed condition.
- Our invention has taken advantage of the combined action of Mo, W, Cu, N which allows to reach a yield strength value higher than 620 MPa (90,000 PSI) as well as a generalized resistance to the stress corrosion, to the pitting and crevice corrosions.
- the optimized chemical composition is the following : (weight in percent) C 0.025 max Mn 0.80 max Si 0.80 max Cr 24 - 26 Ni 6.5 - 8.0 Mo 3.0 - 4.0 S 0.002 max P 0.025 max Cu 1.2 - 2.0 W 0.80 - 1.2 N 0.23 - 0.33 Fe balance
- Mechanical characteristics of the product solution annealed at 1080 °C Room Temp. 80°C 150°C Rs 0.2 MPa (KSI) 630 (91) 550 (80) 480 (70) R MPa (KSI) 865 (125) 800 (116) 750 (110) A % 40 HB 270 °C -45 -65 -100 KV Joule 300 144 38 2.
- a B C weight loss (g/m 2 ) 0.049 0.070 0.76 N° of pitting/m 2 0 0 270 Max pit depth (micron) 0 0 100 Critical Pitting Temp.(°C) 80 60 50 2.3 Corrosion resistance in 5% Na Cl at PH 4 - 6 at 600 mV : A B C CPT (°C) 80 72 63 2.4 Crevice corrosion resistance (ASTM G78 modified) 100 days .
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM920309A IT1257695B (it) | 1992-04-24 | 1992-04-24 | Acciaio austeno-ferritico avente alta resistenza alla corrosione ed elevato carico di snervamento allo stato solubizzato. |
ITRM920309 | 1992-04-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0566814A1 EP0566814A1 (en) | 1993-10-27 |
EP0566814B1 true EP0566814B1 (en) | 1997-09-03 |
Family
ID=11400969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92830586A Revoked EP0566814B1 (en) | 1992-04-24 | 1992-10-26 | Superduplex stainless steel having high corrosion resistance and high yield strength in the solution annealed condition |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0566814B1 (it) |
AT (1) | ATE157710T1 (it) |
DE (1) | DE69222027D1 (it) |
IT (1) | IT1257695B (it) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10357653A1 (de) * | 2003-12-10 | 2005-07-07 | Abb Research Ltd. | Schiffsantrieb |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1263251B (it) | 1992-10-27 | 1996-08-05 | Sviluppo Materiali Spa | Procedimento per la produzione di manufatti in acciaio inossidabile super-duplex. |
FR2711674B1 (fr) * | 1993-10-21 | 1996-01-12 | Creusot Loire | Acier inoxydable austénitique à hautes caractéristiques ayant une grande stabilité structurale et utilisations. |
JP3446294B2 (ja) * | 1994-04-05 | 2003-09-16 | 住友金属工業株式会社 | 二相ステンレス鋼 |
ATE195559T1 (de) * | 1994-05-21 | 2000-09-15 | Park Yong S | Rostfreies duplex-stahl mit guter korrosionsbeständigkeit |
FI100422B (fi) * | 1994-07-11 | 1997-11-28 | Metso Paper Inc | Telan valmistus |
US8710405B2 (en) * | 2005-04-15 | 2014-04-29 | Nippon Steel & Sumikin Stainless Steel Corporation | Austenitic stainless steel welding wire and welding structure |
JP6115935B2 (ja) * | 2013-01-25 | 2017-04-19 | セイコーインスツル株式会社 | 二相ステンレス鋼からなる時効熱処理加工材とそれを用いたダイヤフラムと圧力センサとダイヤフラムバルブ及び二相ステンレス鋼の製造方法 |
GB2546661B (en) * | 2015-12-23 | 2018-04-25 | Goodwin Plc | A welding consumable, a method of welding, and a welded product |
JP6747628B1 (ja) * | 2019-01-30 | 2020-08-26 | Jfeスチール株式会社 | 二相ステンレス鋼、継目無鋼管、および二相ステンレス鋼の製造方法 |
CN111197144A (zh) * | 2020-02-21 | 2020-05-26 | 青岛三庆金属有限公司 | 一种用于食品加热容器的耐高温不锈钢组合物 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61564A (ja) * | 1984-06-13 | 1986-01-06 | Nippon Kokan Kk <Nkk> | 衝撃特性の優れた2相ステンレス鋼 |
GB2203680B (en) * | 1987-04-21 | 1991-06-26 | Nippon Yakin Kogyo Co Ltd | A direct production process of a stainless steel strip having excellent superplasticity and surface properties |
US4816085A (en) * | 1987-08-14 | 1989-03-28 | Haynes International, Inc. | Tough weldable duplex stainless steel wire |
US4915752A (en) * | 1988-09-13 | 1990-04-10 | Carondelet Foundry Company | Corrosion resistant alloy |
-
1992
- 1992-04-24 IT ITRM920309A patent/IT1257695B/it active IP Right Grant
- 1992-10-26 AT AT92830586T patent/ATE157710T1/de not_active IP Right Cessation
- 1992-10-26 EP EP92830586A patent/EP0566814B1/en not_active Revoked
- 1992-10-26 DE DE69222027T patent/DE69222027D1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10357653A1 (de) * | 2003-12-10 | 2005-07-07 | Abb Research Ltd. | Schiffsantrieb |
Also Published As
Publication number | Publication date |
---|---|
EP0566814A1 (en) | 1993-10-27 |
ITRM920309A0 (it) | 1992-04-24 |
IT1257695B (it) | 1996-02-01 |
ITRM920309A1 (it) | 1993-10-24 |
ATE157710T1 (de) | 1997-09-15 |
DE69222027D1 (de) | 1997-10-09 |
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