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Ferritic Stainless Steel Having Excellent Formability Of Welded Zone And Corrosion Resistance, And Method For Manufacturing The Same
Abstract: Disclosed are a ferritic stainless steel and a method for manufacturing the same. The ferritic stainless steel comprises, in terms of % by weight: QO 1% or less C; QO 1% or less N; 1.0% or less Si; 1.0% or less Mn; 1QO~2QO% Cr; Q15% or less Al; Q0005~Q002% Ca; Q0018~Q01% Zr; QOO4~QOO8% O; and the balance of Fe and other unavoidable impurities. Here, the ferritic stainless steel may further comprise one of QOl ~ Q5% Nb and QOl ~ Q5% Ti. The ferritic stainless steel has improved formability of a welding zone and excellent corrosion resistance of the steel by refining solidified grains in the welding zone through combinational addition of Ca and Zr.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
06 May 2009
Publication Number
29/2009
Publication Type
INA
Invention Field
METALLURGY
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2018-02-15
Renewal Date
Applicants
POSCO
1 Koedong-dong Nam-gu Pohang Kyungsangbook-do 790-300 Republic of Korea
Inventors
1. WOO In-Su
C/o POSCO 1 Koedong-dong Nam-gu Pohang Kyungsangbook-do 790-300 Republic of Korea
2. LEE Won-Bae
C/o POSCO 1 Koedong-dong Nam-gu Pohang Kyungsangbook-do 790-300 Republic of Korea
3. KIM Jeong-Kil
C/o POSCO 1 Koedong-dong Nam-gu Pohang Kyungsangbook-do 790-300 Republic of Korea
4. PARK Joon-Sik
C/o POSCO 1 Koedong-dong Nam-gu Pohang Kyungsangbook-do 790-300 Republic of Korea
5. LEE Jong-Bong
C/o POSCO 1 Koedong-dong Nam-gu Pohang Kyungsangbook-do 790-300 Republic of Korea
Specification
FERRITIC STAINLESS STEEL HAVING EXCELLENT FORMABILITY OF WELDED ZONE AND CORROSION RESISTANCE, AND METHOD FOR MANUFACTURING THE SAME
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 3023-DELNP-2009-Form-3 (14-10-2009).pdf | 2009-10-14 |
| 2 | 3023-DELNP-2009-Correspondence-Others (14-10-2009).pdf | 2009-10-14 |
| 3 | 3023-DELNP-2009-Form-1-(30-07-2010).pdf | 2010-07-30 |
| 4 | 3023-DELNP-2009-Correspondence Others-(30-07-2010).pdf | 2010-07-30 |
| 5 | 3023-DELNP-2009-GPA-(11-08-2010.pdf | 2010-08-11 |
| 6 | 3023-DELNP-2009-Form-18-(11-08-2010.pdf | 2010-08-11 |
| 7 | 3023-DELNP-2009-Correspondence-Others-(11-08-2010).pdf | 2010-08-11 |
| 8 | Translation-Search Report.pdf | 2011-08-21 |
| 9 | Priority Document.pdf | 2011-08-21 |
| 10 | Form-5.pdf | 2011-08-21 |
| 11 | Form-3.pdf | 2011-08-21 |
| 12 | Form-1.pdf | 2011-08-21 |
| 13 | 3023-DELNP-2009-FER.pdf | 2016-10-24 |
| 14 | Other Patent Document [20-01-2017(online)].pdf | 2017-01-20 |
| 15 | 3023-DELNP-2009-OTHERS-230117.pdf | 2017-01-27 |
| 16 | 3023-DELNP-2009-Correspondence-230117.pdf | 2017-01-27 |
| 17 | 3023-DELNP-2009-OTHERS-230117..pdf | 2017-02-06 |
| 18 | Other Patent Document [20-04-2017(online)].pdf | 2017-04-20 |
| 19 | Petition Under Rule 137 [21-04-2017(online)].pdf | 2017-04-21 |
| 20 | Other Document [21-04-2017(online)].pdf | 2017-04-21 |
| 21 | Examination Report Reply Recieved [21-04-2017(online)].pdf | 2017-04-21 |
| 22 | Description(Complete) [21-04-2017(online)].pdf_99.pdf | 2017-04-21 |
| 23 | Description(Complete) [21-04-2017(online)].pdf | 2017-04-21 |
| 24 | Correspondence [21-04-2017(online)].pdf | 2017-04-21 |
| 25 | Claims [21-04-2017(online)].pdf | 2017-04-21 |
| 26 | Abstract [21-04-2017(online)].pdf | 2017-04-21 |
| 27 | 3023-DELNP-2009-OTHERS-210417-.pdf | 2017-04-26 |
| 28 | 3023-DELNP-2009-Correspondence-210417-.pdf | 2017-04-26 |
| 29 | 3023-DELNP-2009-HearingNoticeLetter.pdf | 2017-12-15 |
| 30 | 3023-DELNP-2009-Information under section 8(2) (MANDATORY) [22-01-2018(online)].pdf | 2018-01-22 |
| 31 | 3023-DELNP-2009-FORM 3 [22-01-2018(online)].pdf | 2018-01-22 |
| 32 | 3023-DELNP-2009-FORM-26 [23-01-2018(online)].pdf | 2018-01-23 |
| 33 | 3023-DELNP-2009-Written submissions and relevant documents (MANDATORY) [06-02-2018(online)].pdf | 2018-02-06 |
| 34 | 3023-DELNP-2009-Power of Attorney-010218.pdf | 2018-02-06 |
| 35 | 3023-DELNP-2009-Correspondence-010218.pdf | 2018-02-06 |
| 36 | 3023-DELNP-2009-PatentCertificate15-02-2018.pdf | 2018-02-15 |
| 37 | 3023-DELNP-2009-IntimationOfGrant15-02-2018.pdf | 2018-02-15 |
| 38 | 3023-DELNP-2009-RELEVANT DOCUMENTS [28-03-2018(online)].pdf | 2018-03-28 |
| 39 | 3023-DELNP-2009-RELEVANT DOCUMENTS [28-03-2019(online)].pdf | 2019-03-28 |
| 40 | 3023-DELNP-2009-RELEVANT DOCUMENTS [09-03-2020(online)].pdf | 2020-03-09 |