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"High Strength Hot Rolled Steel Sheet For Line Pipe Excellent In Low Temperature Toughness And Ductile Fracture Stopping Performance And Process For Producing The Same"
Abstract: The present invention has as its object the provision of hot rolled steel sheet (hot coil) for line pipe use in which API5L-X80 standard or better high strength and low temperature toughness and ductile fracture arrest performance are achieved and a method of production of the same. For this purpose, the hot rolled steel sheet of the present invention comprises C, Si, Mn, Al, N, Nb, Ti, Ca, V, Mo, Cr, Cu, and Ni in predetermined ranges and a balance of Fe and unavoidable impurities, in which the microstructure is a continuously cooled transformed structure, in which continuously cooled transformed structure, precipitates containing Nb have an average size of 1 to 3 nm and are included dispersed at an average density of 3 to 30xl022/m3, granular bainitic ferrite and/or guasi-polygonal ferrite are included in 50% or more in terms of fraction, furthermore, precipitates containing Ti nitrides are included, and they have an average circle equivalent diameter of 0.1 to 3 µm and include complex oxides including Ca, Ti, and Al in 50% or more in terms of number.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
15 November 2010
Publication Number
09/2012
Publication Type
INA
Invention Field
METALLURGY
Status
Email
remfry-sagar@remfry.com
Parent Application
Patent Number
Legal Status
Grant Date
2017-03-09
Renewal Date
Applicants
NIPPON STEEL CORPORATION,
6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
Inventors
1. TATSUO YOKOI
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
2. HIROSHI ABE
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
3. OSAMU YOSHIDA
C/O NIPPON STEEL CORPORATION, 6-1, MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8071, JAPAN
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 8042-DELNP-2010-Form-3-(18-05-2011).pdf | 2011-05-18 |
| 1 | 8042-DELNP-2010-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |
| 2 | 8042-DELNP-2010-Correspondence-Others-(18-05-2011).pdf | 2011-05-18 |
| 2 | 8042-DELNP-2010-RELEVANT DOCUMENTS [24-09-2022(online)].pdf | 2022-09-24 |
| 3 | 8042-DELNP-2010-RELEVANT DOCUMENTS [26-07-2021(online)].pdf | 2021-07-26 |
| 3 | 8042-delnp-2010-gpa.pdf | 2011-08-20 |
| 4 | 8042-DELNP-2010-RELEVANT DOCUMENTS [24-02-2020(online)].pdf | 2020-02-24 |
| 4 | 8042-delnp-2010-form-5.pdf | 2011-08-20 |
| 5 | 8042-DELNP-2010-PROOF OF ALTERATION [08-07-2019(online)].pdf | 2019-07-08 |
| 5 | 8042-delnp-2010-form-3.pdf | 2011-08-20 |
| 6 | 8042-DELNP-2010-RELEVANT DOCUMENTS [22-02-2019(online)].pdf | 2019-02-22 |
| 6 | 8042-delnp-2010-form-2.pdf | 2011-08-20 |
| 7 | 8042-delnp-2010-form-18.pdf | 2011-08-20 |
| 7 | 281217-8042-delnp-2010.pdf | 2018-07-14 |
| 8 | 8042-DELNP-2010-RELEVANT DOCUMENTS [17-02-2018(online)].pdf | 2018-02-17 |
| 8 | 8042-delnp-2010-form-1.pdf | 2011-08-20 |
| 9 | 8042-delnp-2010-drawings.pdf | 2011-08-20 |
| 9 | 8042-DELNP-2010-PatentCertificateCoverLetter.pdf | 2017-03-17 |
| 10 | 8042-delnp-2010-description (complete).pdf | 2011-08-20 |
| 10 | Other Patent Document [20-02-2017(online)].pdf | 2017-02-20 |
| 11 | 8042-DELNP-2010-Correspondence-091216.pdf | 2016-12-14 |
| 11 | 8042-delnp-2010-correspondence-others.pdf | 2011-08-20 |
| 12 | 8042-delnp-2010-claims.pdf | 2011-08-20 |
| 12 | 8042-DELNP-2010-OTHERS-091216.pdf | 2016-12-14 |
| 13 | 8042-delnp-2010-abstract.pdf | 2011-08-20 |
| 13 | Description(Complete) [13-12-2016(online)].pdf | 2016-12-13 |
| 14 | 8042-delnp-2010-Others-(09-11-2011).pdf | 2011-11-09 |
| 14 | Description(Complete) [13-12-2016(online)].pdf_49.pdf | 2016-12-13 |
| 15 | 8042-delnp-2010-Correspondence-Others-(09-11-2011).pdf | 2011-11-09 |
| 15 | Examination Report Reply Recieved [13-12-2016(online)].pdf | 2016-12-13 |
| 16 | 8042-delnp-2010-Correspondence others-(09-11-2011).pdf | 2011-11-09 |
| 16 | Other Patent Document [09-12-2016(online)].pdf | 2016-12-09 |
| 17 | Abstract [18-11-2016(online)].pdf | 2016-11-18 |
| 17 | 8042-delnp-2010-Form-3-(06-03-2013).pdf | 2013-03-06 |
| 18 | 8042-delnp-2010-Correspondence-Others-(06-03-2013).pdf | 2013-03-06 |
| 18 | Claims [18-11-2016(online)].pdf | 2016-11-18 |
| 19 | 8042-delnp-2010-GPA-(08-07-2013).pdf | 2013-07-08 |
| 19 | Correspondence [18-11-2016(online)].pdf | 2016-11-18 |
| 20 | 8042-delnp-2010-Form-2-(08-07-2013).pdf | 2013-07-08 |
| 20 | Description(Complete) [18-11-2016(online)].pdf | 2016-11-18 |
| 21 | 8042-delnp-2010-Form-1-(08-07-2013).pdf | 2013-07-08 |
| 21 | Examination Report Reply Recieved [18-11-2016(online)].pdf | 2016-11-18 |
| 22 | 8042-delnp-2010-Correspondence-Others-(08-07-2013).pdf | 2013-07-08 |
| 22 | Other Document [18-11-2016(online)].pdf | 2016-11-18 |
| 23 | 8042-delnp-2010-Form-3-(03-09-2013).pdf | 2013-09-03 |
| 23 | Petition Under Rule 137 [18-11-2016(online)].pdf | 2016-11-18 |
| 24 | 8042-DELNP-2010-FER.pdf | 2016-08-19 |
| 24 | 8042-delnp-2010-Correspondence-Others-(03-09-2013).pdf | 2013-09-03 |
| 25 | 8042-delnp-2010-Form-3-(05-09-2014).pdf | 2014-09-05 |
| 25 | AMENDED PAGES OF SPECIFICATION.pdf_4061.pdf | 2015-06-24 |
| 26 | 8042-delnp-2010-Correspondence Others-(05-09-2014).pdf | 2014-09-05 |
| 26 | COVERING LETTER.pdf_4058.pdf | 2015-06-24 |
| 27 | 8042-delnp-2010-Form-3-(02-03-2015).pdf | 2015-03-02 |
| 27 | FORM 13.pdf_4060.pdf | 2015-06-24 |
| 28 | 8042-delnp-2010-Correspondence Others-(02-03-2015).pdf | 2015-03-02 |
| 28 | MARKED-UP COPY.pdf_4059.pdf | 2015-06-24 |
| 29 | AMENDED PAGES OF SPECIFICATION.pdf | 2015-06-04 |
| 29 | MARKED-UP COPY.pdf | 2015-06-04 |
| 30 | COVERING LETTER.pdf | 2015-06-04 |
| 30 | FORM 13.pdf | 2015-06-04 |
| 31 | COVERING LETTER.pdf | 2015-06-04 |
| 31 | FORM 13.pdf | 2015-06-04 |
| 32 | AMENDED PAGES OF SPECIFICATION.pdf | 2015-06-04 |
| 32 | MARKED-UP COPY.pdf | 2015-06-04 |
| 33 | 8042-delnp-2010-Correspondence Others-(02-03-2015).pdf | 2015-03-02 |
| 33 | MARKED-UP COPY.pdf_4059.pdf | 2015-06-24 |
| 34 | 8042-delnp-2010-Form-3-(02-03-2015).pdf | 2015-03-02 |
| 34 | FORM 13.pdf_4060.pdf | 2015-06-24 |
| 35 | 8042-delnp-2010-Correspondence Others-(05-09-2014).pdf | 2014-09-05 |
| 35 | COVERING LETTER.pdf_4058.pdf | 2015-06-24 |
| 36 | AMENDED PAGES OF SPECIFICATION.pdf_4061.pdf | 2015-06-24 |
| 36 | 8042-delnp-2010-Form-3-(05-09-2014).pdf | 2014-09-05 |
| 37 | 8042-delnp-2010-Correspondence-Others-(03-09-2013).pdf | 2013-09-03 |
| 37 | 8042-DELNP-2010-FER.pdf | 2016-08-19 |
| 38 | 8042-delnp-2010-Form-3-(03-09-2013).pdf | 2013-09-03 |
| 38 | Petition Under Rule 137 [18-11-2016(online)].pdf | 2016-11-18 |
| 39 | 8042-delnp-2010-Correspondence-Others-(08-07-2013).pdf | 2013-07-08 |
| 39 | Other Document [18-11-2016(online)].pdf | 2016-11-18 |
| 40 | 8042-delnp-2010-Form-1-(08-07-2013).pdf | 2013-07-08 |
| 40 | Examination Report Reply Recieved [18-11-2016(online)].pdf | 2016-11-18 |
| 41 | 8042-delnp-2010-Form-2-(08-07-2013).pdf | 2013-07-08 |
| 41 | Description(Complete) [18-11-2016(online)].pdf | 2016-11-18 |
| 42 | 8042-delnp-2010-GPA-(08-07-2013).pdf | 2013-07-08 |
| 42 | Correspondence [18-11-2016(online)].pdf | 2016-11-18 |
| 43 | 8042-delnp-2010-Correspondence-Others-(06-03-2013).pdf | 2013-03-06 |
| 43 | Claims [18-11-2016(online)].pdf | 2016-11-18 |
| 44 | 8042-delnp-2010-Form-3-(06-03-2013).pdf | 2013-03-06 |
| 44 | Abstract [18-11-2016(online)].pdf | 2016-11-18 |
| 45 | 8042-delnp-2010-Correspondence others-(09-11-2011).pdf | 2011-11-09 |
| 45 | Other Patent Document [09-12-2016(online)].pdf | 2016-12-09 |
| 46 | Examination Report Reply Recieved [13-12-2016(online)].pdf | 2016-12-13 |
| 46 | 8042-delnp-2010-Correspondence-Others-(09-11-2011).pdf | 2011-11-09 |
| 47 | 8042-delnp-2010-Others-(09-11-2011).pdf | 2011-11-09 |
| 47 | Description(Complete) [13-12-2016(online)].pdf_49.pdf | 2016-12-13 |
| 48 | 8042-delnp-2010-abstract.pdf | 2011-08-20 |
| 48 | Description(Complete) [13-12-2016(online)].pdf | 2016-12-13 |
| 49 | 8042-delnp-2010-claims.pdf | 2011-08-20 |
| 49 | 8042-DELNP-2010-OTHERS-091216.pdf | 2016-12-14 |
| 50 | 8042-DELNP-2010-Correspondence-091216.pdf | 2016-12-14 |
| 50 | 8042-delnp-2010-correspondence-others.pdf | 2011-08-20 |
| 51 | 8042-delnp-2010-description (complete).pdf | 2011-08-20 |
| 51 | Other Patent Document [20-02-2017(online)].pdf | 2017-02-20 |
| 52 | 8042-delnp-2010-drawings.pdf | 2011-08-20 |
| 52 | 8042-DELNP-2010-PatentCertificateCoverLetter.pdf | 2017-03-17 |
| 53 | 8042-delnp-2010-form-1.pdf | 2011-08-20 |
| 53 | 8042-DELNP-2010-RELEVANT DOCUMENTS [17-02-2018(online)].pdf | 2018-02-17 |
| 54 | 281217-8042-delnp-2010.pdf | 2018-07-14 |
| 54 | 8042-delnp-2010-form-18.pdf | 2011-08-20 |
| 55 | 8042-DELNP-2010-RELEVANT DOCUMENTS [22-02-2019(online)].pdf | 2019-02-22 |
| 55 | 8042-delnp-2010-form-2.pdf | 2011-08-20 |
| 56 | 8042-DELNP-2010-PROOF OF ALTERATION [08-07-2019(online)].pdf | 2019-07-08 |
| 56 | 8042-delnp-2010-form-3.pdf | 2011-08-20 |
| 57 | 8042-DELNP-2010-RELEVANT DOCUMENTS [24-02-2020(online)].pdf | 2020-02-24 |
| 57 | 8042-delnp-2010-form-5.pdf | 2011-08-20 |
| 58 | 8042-DELNP-2010-RELEVANT DOCUMENTS [26-07-2021(online)].pdf | 2021-07-26 |
| 58 | 8042-delnp-2010-gpa.pdf | 2011-08-20 |
| 59 | 8042-DELNP-2010-Correspondence-Others-(18-05-2011).pdf | 2011-05-18 |
| 59 | 8042-DELNP-2010-RELEVANT DOCUMENTS [24-09-2022(online)].pdf | 2022-09-24 |
| 60 | 8042-DELNP-2010-Form-3-(18-05-2011).pdf | 2011-05-18 |
| 60 | 8042-DELNP-2010-RELEVANT DOCUMENTS [30-08-2023(online)].pdf | 2023-08-30 |