JPS5647519A - Preparation of high-thickness nontempered high-tensile steel - Google Patents
Preparation of high-thickness nontempered high-tensile steelInfo
- Publication number
- JPS5647519A JPS5647519A JP12349479A JP12349479A JPS5647519A JP S5647519 A JPS5647519 A JP S5647519A JP 12349479 A JP12349479 A JP 12349479A JP 12349479 A JP12349479 A JP 12349479A JP S5647519 A JPS5647519 A JP S5647519A
- Authority
- JP
- Japan
- Prior art keywords
- less
- thickness
- specified
- temperature
- nontempered
- 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 provide a high-thickness, nontempered, high-tensile steel having excellent low temperature toughness and antiweld cracking property by a method wherein a steel material having a specific composition is heated at a specified temperature, rolled to a specified accumultaion reduction factor at a specified temperature, and is finished into a specified thickness.
CONSTITUTION: A steel material consists of C: 0.005W0.04%, Si: 0.5% or less, Mn: 2W2.5%, Nb: 0.01W0.15%, Ti: 0.004W0.03%, Al: 0.005W0.06% as essential components, at least one of Ca: 0.0005W0.005%, REM: 0.0005W0.20%, and at least one of essential components selected from Cu: 0.5% or less, Cr: 0.5% or less, Mo: 0.5% or less, V: 0.15% or less, B: 0.003% or less with the remaining Fe and impurities. The steel composition further specifies that S in the impurities is less than 0.006%, the amount of Ca and/or REM and S is related by the formula I, and the value of PCM calculated by the formula II is less than 0.2%. Such steel material is heated at a temperature betwen 1,100 and 1,280°C, is rolled to 60% or more of accumulation reduction factor below 980°C and at finishing temperature of 900°C or less, and is finished into a plate of 25mm thick or more.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12349479A JPS5647519A (en) | 1979-09-25 | 1979-09-25 | Preparation of high-thickness nontempered high-tensile steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12349479A JPS5647519A (en) | 1979-09-25 | 1979-09-25 | Preparation of high-thickness nontempered high-tensile steel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5647519A true JPS5647519A (en) | 1981-04-30 |
Family
ID=14862009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12349479A Pending JPS5647519A (en) | 1979-09-25 | 1979-09-25 | Preparation of high-thickness nontempered high-tensile steel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5647519A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6331390U (en) * | 1986-08-16 | 1988-02-29 |
-
1979
- 1979-09-25 JP JP12349479A patent/JPS5647519A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6331390U (en) * | 1986-08-16 | 1988-02-29 |
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