JPS54127828A - Production of 50 kg steel excellent in weldability - Google Patents
Production of 50 kg steel excellent in weldabilityInfo
- Publication number
- JPS54127828A JPS54127828A JP3640778A JP3640778A JPS54127828A JP S54127828 A JPS54127828 A JP S54127828A JP 3640778 A JP3640778 A JP 3640778A JP 3640778 A JP3640778 A JP 3640778A JP S54127828 A JPS54127828 A JP S54127828A
- Authority
- JP
- Japan
- Prior art keywords
- weldability
- steel
- temperature
- annealing
- ship building
- 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: A low carbon equivalent steel is adjustedly cooled in annealing process to thereby provide a 50 Kg steel for ship building use, having an excellent weldability.
CONSTITUTION: A steel containing C<0.18%, Si: 0.10 to 1.0%, Mn<2.0%, P<0.035%, P<0.035%, Nb: 0.02 to 0.10%, V: 0.02 to 0.10%, Sol Al: 0.01 to 0.09% is heated to a temperature of 880 to 950°C for annealing. In annealing process, cooling rate is controlled in a range of 2 to 4°C/sec from ferrite modification starting temperature 800°C to ferriet modification finishing temperature 550°C. In such process, large grain bainite formation is effectively prevented, thereby providing a 50kg E class strength useful for ship building steel plate excellent in weldability.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3640778A JPS54127828A (en) | 1978-03-28 | 1978-03-28 | Production of 50 kg steel excellent in weldability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3640778A JPS54127828A (en) | 1978-03-28 | 1978-03-28 | Production of 50 kg steel excellent in weldability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54127828A true JPS54127828A (en) | 1979-10-04 |
Family
ID=12468976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3640778A Pending JPS54127828A (en) | 1978-03-28 | 1978-03-28 | Production of 50 kg steel excellent in weldability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54127828A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030018316A (en) * | 2001-08-28 | 2003-03-06 | 주식회사 포스코 | Manufacturing method of 50kg/㎟ grade steels for pressure vessels with excellent toughness and weldability |
| KR100928796B1 (en) * | 2002-09-02 | 2009-11-25 | 주식회사 포스코 | Steel Fabrication Method for 600MPa Pressure Vessel with High Tensile Strength |
-
1978
- 1978-03-28 JP JP3640778A patent/JPS54127828A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030018316A (en) * | 2001-08-28 | 2003-03-06 | 주식회사 포스코 | Manufacturing method of 50kg/㎟ grade steels for pressure vessels with excellent toughness and weldability |
| KR100928796B1 (en) * | 2002-09-02 | 2009-11-25 | 주식회사 포스코 | Steel Fabrication Method for 600MPa Pressure Vessel with High Tensile Strength |
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