JPS5466323A - Nanufacture of high tougness high tensile steel sheet for line pipe - Google Patents
Nanufacture of high tougness high tensile steel sheet for line pipeInfo
- Publication number
- JPS5466323A JPS5466323A JP13377177A JP13377177A JPS5466323A JP S5466323 A JPS5466323 A JP S5466323A JP 13377177 A JP13377177 A JP 13377177A JP 13377177 A JP13377177 A JP 13377177A JP S5466323 A JPS5466323 A JP S5466323A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- line pipe
- tensile steel
- nanufacture
- tougness
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE: To manufacture a high toughness high tensile steel sheet for pipes with low welding crack sensibility and no lowering in yueld strength due to pipe making by adding Mo and Cu to steel and regulating hot rolling concitions.
CONSTITUTION: Steel contg. C; 0.02W0.10%, Si: 0.05W0.50%, Mn; 1.0W1.8%, Cu; 0.15W0.45%, Mo; 0.08W0.25%, Nb; 0.01W0.10%, Al; 0.005W0.06%, and optionally one or more cut of Ni<0.50%, Cr<0.50%, V<0.20%, Ti<0.10%, Zr<0.1%, a rare earth element <0.05% and Ca<0.005% is hot rolled at a total reduction ratio above 50% at above 900°C and the rolling is finished at a temp. above Ar3 transformation point. The combined addn. of Mo and Cu regulates the areal percentage of bainite or acicular ferrite in the structre to 3W15%. When a line pipe is made of the resulting sheet, the yield strength is not lowered by the pipe making and the welding crack sensibility is low.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52133771A JPS5919177B2 (en) | 1977-11-07 | 1977-11-07 | High toughness high tensile strength steel plate for line pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52133771A JPS5919177B2 (en) | 1977-11-07 | 1977-11-07 | High toughness high tensile strength steel plate for line pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5466323A true JPS5466323A (en) | 1979-05-28 |
| JPS5919177B2 JPS5919177B2 (en) | 1984-05-02 |
Family
ID=15112577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52133771A Expired JPS5919177B2 (en) | 1977-11-07 | 1977-11-07 | High toughness high tensile strength steel plate for line pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919177B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388122A (en) * | 1980-08-11 | 1983-06-14 | Kabushiki Kaisha Kobe Seiko Sho | Method of making high strength hot rolled steel sheet having excellent flash butt weldability, fatigue characteristic and formability |
| KR20040019452A (en) * | 2002-08-26 | 2004-03-06 | 주식회사 포스코 | Method for manufacturing a hot coil for the high toughness and strength line pipe with high productivity |
| KR100564883B1 (en) * | 2001-11-13 | 2006-03-30 | 주식회사 포스코 | Manufacturing method of hot coil for usage as a line pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0543809Y2 (en) * | 1987-10-30 | 1993-11-05 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52111816A (en) * | 1976-03-17 | 1977-09-19 | Sumitomo Metal Ind Ltd | Temper type high tensile steel containing niobium and superior in weld ability |
-
1977
- 1977-11-07 JP JP52133771A patent/JPS5919177B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52111816A (en) * | 1976-03-17 | 1977-09-19 | Sumitomo Metal Ind Ltd | Temper type high tensile steel containing niobium and superior in weld ability |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388122A (en) * | 1980-08-11 | 1983-06-14 | Kabushiki Kaisha Kobe Seiko Sho | Method of making high strength hot rolled steel sheet having excellent flash butt weldability, fatigue characteristic and formability |
| KR100564883B1 (en) * | 2001-11-13 | 2006-03-30 | 주식회사 포스코 | Manufacturing method of hot coil for usage as a line pipe |
| KR20040019452A (en) * | 2002-08-26 | 2004-03-06 | 주식회사 포스코 | Method for manufacturing a hot coil for the high toughness and strength line pipe with high productivity |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5919177B2 (en) | 1984-05-02 |
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