JPS56119756A - Extramild steel pipe with superior workability - Google Patents
Extramild steel pipe with superior workabilityInfo
- Publication number
- JPS56119756A JPS56119756A JP2285380A JP2285380A JPS56119756A JP S56119756 A JPS56119756 A JP S56119756A JP 2285380 A JP2285380 A JP 2285380A JP 2285380 A JP2285380 A JP 2285380A JP S56119756 A JPS56119756 A JP S56119756A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- extramild
- steel
- small amount
- resulting
- 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 Articles (AREA)
Abstract
PURPOSE: To enhance the bendability of a resulting extramild steel pipe for piping by tubularly forming a steel contg. impurities reduced as little as possible and a very small amount of added B and by adding a heat treatment at a specified temp.
CONSTITUTION: A steel consisting of, by wt., ≤0.01% C, ≤0.05% Si, ≤0.40% Mn, ≤0.025% P, ≤0.025% S, ≤0.050% sol. Al, 0.0005W0.0030% B and the balance Fe and inevitable impurities is tubularly formed and heat treated at 850W 900°C. The addition of such a very small amount of B prevents a strength rise due to strain aging, and the yield strength after repeated bending can be controlled to a relatively low level. The resulting steel pipe is softened by heating for a short time.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2285380A JPS6013410B2 (en) | 1980-02-27 | 1980-02-27 | Method for manufacturing ultra-soft steel pipe with excellent bending workability and repeated bendability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2285380A JPS6013410B2 (en) | 1980-02-27 | 1980-02-27 | Method for manufacturing ultra-soft steel pipe with excellent bending workability and repeated bendability |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56119756A true JPS56119756A (en) | 1981-09-19 |
JPS6013410B2 JPS6013410B2 (en) | 1985-04-06 |
Family
ID=12094268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2285380A Expired JPS6013410B2 (en) | 1980-02-27 | 1980-02-27 | Method for manufacturing ultra-soft steel pipe with excellent bending workability and repeated bendability |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6013410B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58141335A (en) * | 1982-02-15 | 1983-08-22 | Nippon Kokan Kk <Nkk> | Production of cold rolled steel plate having aging resistance and deep drawability |
-
1980
- 1980-02-27 JP JP2285380A patent/JPS6013410B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58141335A (en) * | 1982-02-15 | 1983-08-22 | Nippon Kokan Kk <Nkk> | Production of cold rolled steel plate having aging resistance and deep drawability |
Also Published As
Publication number | Publication date |
---|---|
JPS6013410B2 (en) | 1985-04-06 |
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