JPS5479118A - Manufacture of steel for low temperature use with superior falling weight test characteristics and superior toughness at heat-affected zone of welded joint - Google Patents

Manufacture of steel for low temperature use with superior falling weight test characteristics and superior toughness at heat-affected zone of welded joint

Info

Publication number
JPS5479118A
JPS5479118A JP14659177A JP14659177A JPS5479118A JP S5479118 A JPS5479118 A JP S5479118A JP 14659177 A JP14659177 A JP 14659177A JP 14659177 A JP14659177 A JP 14659177A JP S5479118 A JPS5479118 A JP S5479118A
Authority
JP
Japan
Prior art keywords
steel
superior
heat
welded joint
falling weight
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
Application number
JP14659177A
Other languages
Japanese (ja)
Other versions
JPS5719734B2 (en
Inventor
Makoto Sato
Akira Nakajima
Kentaro Okamoto
Ken Kanetani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP14659177A priority Critical patent/JPS5479118A/en
Publication of JPS5479118A publication Critical patent/JPS5479118A/en
Publication of JPS5719734B2 publication Critical patent/JPS5719734B2/ja
Granted legal-status Critical Current

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  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE: To enhance the falling weight test characteristics of a steel for low temp. use and the toughness thereof at the heat-affected zone of a welded joint by limiting the total reduction ratio and heat treatment conditions of the steel contg. C, Si, Mn, Nb and Al, and further contg. P, S and N limited.
CONSTITUTION: A steel is refined contg., by wt., C; 0.03W0.16%, Si; 0.01W0.5%, Mn; 0.7W1.7% (C%+0.22Mn%≤0.52), Nb; 0.005W0.06%, Al; 0.005W0.08%, P≤0.015%, Si≤0.01% and N≤0.003%. The steel is then rolled at a total reduction ratio above 2 at Ar3+150°C or below and heat treated at 450°CW(Ac3+50°C). Thus, superior falling weight test characteristics such as NDT; -55°C W -95°C are obtd, and a value above 5 kg-m can be ensured as the min. value (vE-55min) of 2 mm V notch Charpy impact value at -55°C in a welded joint the welding heat input of which is 30W60 kj/cm.
COPYRIGHT: (C)1979,JPO&Japio
JP14659177A 1977-12-08 1977-12-08 Manufacture of steel for low temperature use with superior falling weight test characteristics and superior toughness at heat-affected zone of welded joint Granted JPS5479118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14659177A JPS5479118A (en) 1977-12-08 1977-12-08 Manufacture of steel for low temperature use with superior falling weight test characteristics and superior toughness at heat-affected zone of welded joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14659177A JPS5479118A (en) 1977-12-08 1977-12-08 Manufacture of steel for low temperature use with superior falling weight test characteristics and superior toughness at heat-affected zone of welded joint

Publications (2)

Publication Number Publication Date
JPS5479118A true JPS5479118A (en) 1979-06-23
JPS5719734B2 JPS5719734B2 (en) 1982-04-24

Family

ID=15411169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14659177A Granted JPS5479118A (en) 1977-12-08 1977-12-08 Manufacture of steel for low temperature use with superior falling weight test characteristics and superior toughness at heat-affected zone of welded joint

Country Status (1)

Country Link
JP (1) JPS5479118A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61272348A (en) * 1985-05-27 1986-12-02 Kobe Steel Ltd High-toughness steel for high heat input welding
JPS61284554A (en) * 1985-06-12 1986-12-15 Kobe Steel Ltd Alloy steel for unrefined bolt or the like having superior toughness and steel material for unrefined bolt or the like using same
JPS62247838A (en) * 1987-04-17 1987-10-28 Babcock Hitachi Kk Plate-shaped catalyst

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61272348A (en) * 1985-05-27 1986-12-02 Kobe Steel Ltd High-toughness steel for high heat input welding
JPS61284554A (en) * 1985-06-12 1986-12-15 Kobe Steel Ltd Alloy steel for unrefined bolt or the like having superior toughness and steel material for unrefined bolt or the like using same
JPS62247838A (en) * 1987-04-17 1987-10-28 Babcock Hitachi Kk Plate-shaped catalyst
JPH0249128B2 (en) * 1987-04-17 1990-10-29 Babcock Hitachi Kk

Also Published As

Publication number Publication date
JPS5719734B2 (en) 1982-04-24

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