JPS5466321A - Manufacture of unrefined high tensile steel for welded structure - Google Patents

Manufacture of unrefined high tensile steel for welded structure

Info

Publication number
JPS5466321A
JPS5466321A JP13267177A JP13267177A JPS5466321A JP S5466321 A JPS5466321 A JP S5466321A JP 13267177 A JP13267177 A JP 13267177A JP 13267177 A JP13267177 A JP 13267177A JP S5466321 A JPS5466321 A JP S5466321A
Authority
JP
Japan
Prior art keywords
steel
unrefined
high tensile
hot rolled
welded structure
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
Application number
JP13267177A
Other languages
Japanese (ja)
Inventor
Hiroshi Sekine
Hirobumi Morikawa
Sakika Kawashima
Haruo Shimada
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 JP13267177A priority Critical patent/JPS5466321A/en
Publication of JPS5466321A publication Critical patent/JPS5466321A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enhance the strength, toughness and weldability of a low Nb-Mo-Ti type unrefined steel by hot rolling the steel under specific conditions to convert the structure into of fine ferrite.pearlite.
CONSTITUTION: Unrefined steel contg. C; 0.02W0.10%, Si; 0.02W0.35%, Mn; 1.0 W1.8%, Mo; 0.05W0.40%, Nb; 0.01W0.05%, Al; 0.005W0.08%, Ti; 0.005W 0.02%, N; 0.002W0.007%, and optionally Ni<1.5% and/or Cu<0.6% is hot rolled at a specific temp. and a specific reduction ratio according to the Mo and Nb contents to obtain an unrefined high tensile steel with superior strength, toughness and weldability for welded structure. It has more than 65% of ferrite.pealite structure as hot rolled. The above steel to be hot rolled may further contain one or more out of V; 0.02W0.10%, a rare earth element <0.07% and Ca<0.005%, and it satisfies a specific relation among the contents of C, Mn, Mo, Ni, Cu, and Nb.
COPYRIGHT: (C)1979,JPO&Japio
JP13267177A 1977-11-05 1977-11-05 Manufacture of unrefined high tensile steel for welded structure Pending JPS5466321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13267177A JPS5466321A (en) 1977-11-05 1977-11-05 Manufacture of unrefined high tensile steel for welded structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13267177A JPS5466321A (en) 1977-11-05 1977-11-05 Manufacture of unrefined high tensile steel for welded structure

Publications (1)

Publication Number Publication Date
JPS5466321A true JPS5466321A (en) 1979-05-28

Family

ID=15086767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13267177A Pending JPS5466321A (en) 1977-11-05 1977-11-05 Manufacture of unrefined high tensile steel for welded structure

Country Status (1)

Country Link
JP (1) JPS5466321A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159932A (en) * 1983-03-02 1984-09-10 Sumitomo Metal Ind Ltd Production of high tensile steel plate having excellent strength and toughness
US5858130A (en) * 1997-06-25 1999-01-12 Bethlehem Steel Corporation Composition and method for producing an alloy steel and a product therefrom for structural applications
JP2014062333A (en) * 2006-10-06 2014-04-10 Exxonmobil Upstram Research Company Low yield ratio dual phase steel linepipe with superior strain aging resistance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52128821A (en) * 1976-04-12 1977-10-28 Nippon Steel Corp Preparation of high tensile steel having superior low temperature toughness and yield point above 40 kg/pp2
JPS52131918A (en) * 1976-04-28 1977-11-05 Nippon Kokan Kk <Nkk> Production of non-refined high tensile thick steel plate with excellent toughness
JPS5421917A (en) * 1977-07-20 1979-02-19 Nippon Kokan Kk <Nkk> Method of manufacturing non-quenched high-tensile steel having high toughness

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52128821A (en) * 1976-04-12 1977-10-28 Nippon Steel Corp Preparation of high tensile steel having superior low temperature toughness and yield point above 40 kg/pp2
JPS52131918A (en) * 1976-04-28 1977-11-05 Nippon Kokan Kk <Nkk> Production of non-refined high tensile thick steel plate with excellent toughness
JPS5421917A (en) * 1977-07-20 1979-02-19 Nippon Kokan Kk <Nkk> Method of manufacturing non-quenched high-tensile steel having high toughness

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159932A (en) * 1983-03-02 1984-09-10 Sumitomo Metal Ind Ltd Production of high tensile steel plate having excellent strength and toughness
JPS6366368B2 (en) * 1983-03-02 1988-12-20 Sumitomo Metal Ind
US5858130A (en) * 1997-06-25 1999-01-12 Bethlehem Steel Corporation Composition and method for producing an alloy steel and a product therefrom for structural applications
JP2014062333A (en) * 2006-10-06 2014-04-10 Exxonmobil Upstram Research Company Low yield ratio dual phase steel linepipe with superior strain aging resistance

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