JPS6436724A - Production of 60 kilogram class steel plate having low yield ratio - Google Patents
Production of 60 kilogram class steel plate having low yield ratioInfo
- Publication number
- JPS6436724A JPS6436724A JP19010987A JP19010987A JPS6436724A JP S6436724 A JPS6436724 A JP S6436724A JP 19010987 A JP19010987 A JP 19010987A JP 19010987 A JP19010987 A JP 19010987A JP S6436724 A JPS6436724 A JP S6436724A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- low yield
- yield ratio
- steel plate
- time
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE:To produce the titled steel plate having high weldability and high welded joint capacity by rolling the steel having specific compsn. at Ar1-Ar3 point and thereafter subjecting it to accelerated cooling to the specific temp. or below at the time of hot rolling said steel. CONSTITUTION:The steel consisting of, by weight, 0.06-0.15% C, 0.05-0.30% Si, 1.0-1.6% Mn, 0.10-0.50% Cr, 0.005-0.030% Nb, 0.005-0.030% Ti, 0.0002-0.0020% B, 0.001-0.040% Al and the balance Fe is hot rolled. At this time, the rolling is finished at Ar1-Ar3 point and the steel is immediately subjected to the accelerated cooling at <=400 deg.C. By this method, ferrite+bainite structure is formed to obtain low yield ratio, and at this time, the compsn. of the steel is simultaneously regulated to ensure the weldability thereof. The 60kg class steel plate having low yield ratio and having excellent weldability and welded joint capacity (as well as having >=58kgf/mm<2> tensile strength) can be thereby produced as non-heat treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19010987A JPS6436724A (en) | 1987-07-31 | 1987-07-31 | Production of 60 kilogram class steel plate having low yield ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19010987A JPS6436724A (en) | 1987-07-31 | 1987-07-31 | Production of 60 kilogram class steel plate having low yield ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6436724A true JPS6436724A (en) | 1989-02-07 |
Family
ID=16252527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19010987A Pending JPS6436724A (en) | 1987-07-31 | 1987-07-31 | Production of 60 kilogram class steel plate having low yield ratio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6436724A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6621194B1 (en) | 1999-11-15 | 2003-09-16 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric element having thickness shear vibration and mobile communication device using the same |
| JP2016172892A (en) * | 2015-03-17 | 2016-09-29 | Ｊｆｅスチール株式会社 | Low yield ratio high strength thick steel plate for building structure excellent in toughness in ultrahigh heat input weld zone |
| CN112501496A (en) * | 2020-10-20 | 2021-03-16 | 江苏省沙钢钢铁研究院有限公司 | On-line quenching type double-phase low-yield-ratio steel plate and production method thereof |
-
1987
- 1987-07-31 JP JP19010987A patent/JPS6436724A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6621194B1 (en) | 1999-11-15 | 2003-09-16 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric element having thickness shear vibration and mobile communication device using the same |
| JP2016172892A (en) * | 2015-03-17 | 2016-09-29 | Ｊｆｅスチール株式会社 | Low yield ratio high strength thick steel plate for building structure excellent in toughness in ultrahigh heat input weld zone |
| CN112501496A (en) * | 2020-10-20 | 2021-03-16 | 江苏省沙钢钢铁研究院有限公司 | On-line quenching type double-phase low-yield-ratio steel plate and production method thereof |
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