HIGH-TENSILE-STRENGTH STEEL MATERIAL FOR FLASH BUTT WELDING SUPERIOR IN TOUGHNESS OF WELD ZONE, AND WELDED STRUCTURE THEREOF

PROBLEM TO BE SOLVED: To provide a steel for a welded structure including a 400 MPa grade or 490 MPa grade steel, which is usable for the flash butt welded structure such as a building, a bridge, a construction machine, a ship, an ocean structure and a line pipe, and to provide a steel structure the...

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Bibliographic Details
Main Authors YOSHII KENICHI, ISHIKAWA HAJIME, UEMORI RYUJI, WATABE YOSHIYUKI
Format Patent
LanguageEnglish
Published 24.12.2004
Edition7
Subjects
ALLOYS
CHEMISTRY
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
FERROUS OR NON-FERROUS ALLOYS
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
METALLURGY
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WELDING
WORKING BY LASER BEAM
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Summary:PROBLEM TO BE SOLVED: To provide a steel for a welded structure including a 400 MPa grade or 490 MPa grade steel, which is usable for the flash butt welded structure such as a building, a bridge, a construction machine, a ship, an ocean structure and a line pipe, and to provide a steel structure thereof. SOLUTION: This steel material has a steel composition comprising, by mass%, 0.03-0.2% C, 0.01-2.5% Si, 0.25-2.0% Mn, 0.03% or less P, 0.03% or less S and 0.05% or less Al, while controlling Mn/Si so as to satisfy 2 to 30, Ceq=C+Mn/6+Si/24+Ni/40+Cr/5+Mo/4+V/14 to 0.2 to 0.5, and Pcm=C+Si/30+Mn/20+Ni/60+Cu/20+Cr/20+Mo/15+V/15+5B to 0.1 to 0.3. COPYRIGHT: (C)2005,JPO&NCIPI
Bibliography:Application Number: JP20030162901