MX2024002881A - Tuberia de acero inoxidable sin costura de alta resistencia para pozos de petroleo y metodo para producir la misma. - Google Patents
Tuberia de acero inoxidable sin costura de alta resistencia para pozos de petroleo y metodo para producir la misma.Info
- Publication number
- MX2024002881A MX2024002881A MX2024002881A MX2024002881A MX2024002881A MX 2024002881 A MX2024002881 A MX 2024002881A MX 2024002881 A MX2024002881 A MX 2024002881A MX 2024002881 A MX2024002881 A MX 2024002881A MX 2024002881 A MX2024002881 A MX 2024002881A
- Authority
- MX
- Mexico
- Prior art keywords
- stainless steel
- oil wells
- seamless pipe
- strength stainless
- steel seamless
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/22—Martempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/007—Heat treatment of ferrous alloys containing Co
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
-
- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Se proporciona una tubería de acero inoxidable sin fisura de alta resistencia para pozos petroleros y un método para producirlo. La tubería de acero inoxidable sin fisura de alta resistencia para pozos petroleros de conformidad con la presente invención tiene una composición química que contiene, en masa, C: 0.002 % a 0.05 %, Si: 0.05 % a 0.50 %, Mn: 0.04 % a 1.80 %, P: 0.030 % o menos, S: 0.0020 % o menos, Cr: más de 14.0 % y 17.0 % o menos, Ni: 4.0 % a 8.0 %, Mo: 1.5 % a 3.0 %, Al: 0.005 % a 0.10 %, V: 0.005 % a 0.20 %, N: 0.002 % a 0.15 %, Ti: 0.002 % a 0.020 % y O: 0.006 % o menos, satisfaciendo expresiones relacionales predeterminadas de Cr, Ni, Mo, Cu, C, Si, Mn y N, siendo el resto Fe e impurezas incidentales. La microestructura de la tubería de acero incluye una fase de martensita tal que la fracción de área de la fase de martensita es del 70 % o más. La concentración promedio de Ti en inclusiones que tienen una longitud de eje mayor de 2 ?m o más es del 10 % en masa o más. La tubería de acero tiene un límite elástico de 758 MPa o más.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021159858 | 2021-09-29 | ||
| PCT/JP2022/030641 WO2023053743A1 (ja) | 2021-09-29 | 2022-08-10 | 油井用高強度ステンレス継目無鋼管およびその製造方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX2024002881A true MX2024002881A (es) | 2024-03-22 |
Family
ID=85252026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX2024002881A MX2024002881A (es) | 2021-09-29 | 2022-08-10 | Tuberia de acero inoxidable sin costura de alta resistencia para pozos de petroleo y metodo para producir la misma. |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240410499A1 (es) |
| EP (1) | EP4372117A4 (es) |
| JP (1) | JP7226675B1 (es) |
| CN (1) | CN117980517A (es) |
| MX (1) | MX2024002881A (es) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250320592A1 (en) * | 2022-07-05 | 2025-10-16 | Jfe Steel Corporation | Stainless steel seamless pipe and production method therefor |
| EP4509630A1 (en) * | 2022-07-05 | 2025-02-19 | JFE Steel Corporation | Seamless stainless steel pipe and production method therefor |
| WO2024009564A1 (ja) * | 2022-07-05 | 2024-01-11 | Jfeスチール株式会社 | ステンレス継目無鋼管およびその製造方法 |
| WO2025239084A1 (ja) * | 2024-05-14 | 2025-11-20 | Jfeスチール株式会社 | ステンレス継目無鋼管およびその製造方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004001082A1 (ja) * | 2002-06-19 | 2003-12-31 | Jfe Steel Corporation | 油井用ステンレス鋼管およびその製造方法 |
| JP4893196B2 (ja) * | 2006-09-28 | 2012-03-07 | Jfeスチール株式会社 | 高靭性でかつ耐食性に優れた油井用高強度ステンレス鋼管 |
| JP5807630B2 (ja) * | 2012-12-12 | 2015-11-10 | Jfeスチール株式会社 | 継目無鋼管の熱処理設備列および高強度ステンレス鋼管の製造方法 |
| WO2016079922A1 (ja) * | 2014-11-18 | 2016-05-26 | Jfeスチール株式会社 | 油井用高強度ステンレス継目無鋼管の製造方法 |
| JP6292142B2 (ja) * | 2015-02-06 | 2018-03-14 | Jfeスチール株式会社 | 油井用高強度ステンレス継目無鋼管の製造方法 |
| JP6341128B2 (ja) * | 2015-03-30 | 2018-06-13 | Jfeスチール株式会社 | 油井用薄肉高強度ステンレス継目無鋼管の製造方法 |
| US11414719B2 (en) * | 2016-03-29 | 2022-08-16 | Jfe Steel Corporation | High strength stainless steel seamless pipe for oil country tubular goods |
| WO2019225281A1 (ja) * | 2018-05-25 | 2019-11-28 | Jfeスチール株式会社 | 油井管用マルテンサイト系ステンレス継目無鋼管およびその製造方法 |
| ES3014590T3 (en) * | 2018-07-09 | 2025-04-23 | Nippon Steel Corp | Seamless steel pipe and manufacturing method thereof |
| AR116495A1 (es) * | 2018-09-27 | 2021-05-12 | Nippon Steel Corp | Material de acero inoxidable martensítico |
| WO2021131445A1 (ja) * | 2019-12-24 | 2021-07-01 | Jfeスチール株式会社 | 油井用高強度ステンレス継目無鋼管 |
| EP4108797A4 (en) * | 2020-04-01 | 2024-09-25 | JFE Steel Corporation | HIGH STRENGTH STAINLESS STEEL SEAMLESS PIPE FOR OIL WELL AND ITS MANUFACTURING METHOD |
-
2022
- 2022-08-10 EP EP22875618.5A patent/EP4372117A4/en active Pending
- 2022-08-10 US US18/689,526 patent/US20240410499A1/en active Pending
- 2022-08-10 JP JP2022565791A patent/JP7226675B1/ja active Active
- 2022-08-10 CN CN202280062289.2A patent/CN117980517A/zh active Pending
- 2022-08-10 MX MX2024002881A patent/MX2024002881A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US20240410499A1 (en) | 2024-12-12 |
| EP4372117A4 (en) | 2025-10-29 |
| JPWO2023053743A1 (es) | 2023-04-06 |
| JP7226675B1 (ja) | 2023-02-21 |
| CN117980517A (zh) | 2024-05-03 |
| EP4372117A1 (en) | 2024-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MX2024002881A (es) | Tuberia de acero inoxidable sin costura de alta resistencia para pozos de petroleo y metodo para producir la misma. | |
| MX2022012018A (es) | Tubo de acero inoxidable de alta resistencia sin costura para productos tubulares de uso petrolero y metodo para fabricar el mismo. | |
| MX2022010591A (es) | Acero para cadena de mineria y metodo de fabricacion del mismo. | |
| AU2015353251B2 (en) | Low-alloy high-strength high-tenacity steel panel and method for manufacturing same | |
| PH12019501995A1 (en) | High-mn steel and production method therefor | |
| NZ708752A (en) | High-toughness low-alloy wear-resistant steel sheet and method of manufacturing the same | |
| KR101988144B1 (ko) | 재질 균일성이 우수한 후육 고인성 고장력 강판 및 그 제조 방법 | |
| MX2022011506A (es) | Tubo de acero inoxidable sin soldadura y metodo para fabricar un tubo de acero inoxidable sin soldadura. | |
| ZA202307142B (en) | Non-quenched and tempered round steel with high strength, high toughness and easy cutting and manufacturing method therefor | |
| MX2022011507A (es) | Tubo de acero inoxidable sin soldadura y metodo para fabricar un tubo de acero inoxidable sin soldadura. | |
| MX2023008536A (es) | Tuberia de acero inoxidable de alta resistencia para productos tubulares para campos petroleros y procedimiento para su fabricacion. | |
| MY158405A (en) | Seamless steel pipe for steam injection and method for manufacturing the same | |
| CA2500518A1 (en) | High strength seamless steel pipe excellent in hydrogen-induced cracking resistance and its production method | |
| EP2684974B1 (en) | Duplex stainless steel | |
| EP2361996A3 (en) | Low alloy pipe steel for oil well use and seamless steel pipe | |
| MX2023011533A (es) | Lamina de acero, miembro, y metodo para producir la lamina de acero, y metodo para producir el miembro. | |
| JP7016345B2 (ja) | マイクロ合金鋼およびその鋼の生産方法 | |
| SG151274A1 (en) | A high-strength thick steel plate excellent in low temperature toughness at heat affected zone resulting from large heat input welding | |
| CA3121604C (en) | Hot rolled and steel and a method of manufacturing thereof | |
| MX2024002348A (es) | Lamina de acero de alta resistencia y metodo de fabricacion de la misma. | |
| WO2019132179A8 (ko) | 고강도 고인성 열연강판 및 그 제조방법 | |
| NZ744668A (en) | Low alloy high strength seamless steel pipe for oil country tubular goods | |
| NZ744590A (en) | Low alloy high strength seamless steel pipe for oil country tubular goods | |
| ZA202500867B (en) | Hot-rolled complex-phase steel with 800-mpa-grade tensile strength and manufacturing method therefor | |
| MY207809A (en) | Submerged arc welded joint |