STEEL STRIP FOR ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE, ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE, AND PROCESS FOR PRODUCING STEEL STRIP FOR ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE

A steel strip for an electric-resistance-welded steel pipe or tube having a strength of X70 grade or more and excellent HIC resistance and SSC resistance is provided. A steel strip for an electric-resistance-welded steel pipe or tube has a chemical composition containing, in mass%: C: 0.02% to 0.06%...

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description A steel strip for an electric-resistance-welded steel pipe or tube having a strength of X70 grade or more and excellent HIC resistance and SSC resistance is provided. A steel strip for an electric-resistance-welded steel pipe or tube has a chemical composition containing, in mass%: C: 0.02% to 0.06%; Si: 0.1% to 0.3%; Mn: 0.8% to 1.3%; P: 0.01% or less; S: 0.001% or less; V: 0.04% to 0.07%; Nb: 0.04% to 0.07%; Ti: 0.01% to 0.04%; Cu: 0.1% to 0.3%; Ni: 0.1% to 0.3%; Ca: 0.001% to 0.005%; Al: 0.01% to 0.07%; and N: 0.007% or less, with a balance being Fe and incidental impurities, contents of C, Nb, V, and Ti satisfying the following Expression (1) C ˆ’ 12 Nb / 92.9 + V / 50.9 + Ti / 47.9 ‰¤ 0.03 % wherein a ferrite area ratio is 90% or more.
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A steel strip for an electric-resistance-welded steel pipe or tube has a chemical composition containing, in mass%: C: 0.02% to 0.06%; Si: 0.1% to 0.3%; Mn: 0.8% to 1.3%; P: 0.01% or less; S: 0.001% or less; V: 0.04% to 0.07%; Nb: 0.04% to 0.07%; Ti: 0.01% to 0.04%; Cu: 0.1% to 0.3%; Ni: 0.1% to 0.3%; Ca: 0.001% to 0.005%; Al: 0.01% to 0.07%; and N: 0.007% or less, with a balance being Fe and incidental impurities, contents of C, Nb, V, and Ti satisfying the following Expression (1) C ˆ’ 12 Nb / 92.9 + V / 50.9 + Ti / 47.9 ‰¤ 0.03 % wherein a ferrite area ratio is 90% or more.</abstract><oa>free_for_read</oa></addata></record>
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language eng ; fre ; ger
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subjects ALLOYS
AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL
CHEMISTRY
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
FERROUS OR NON-FERROUS ALLOYS
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
MACHINE TOOLS
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
METAL-WORKING NOT OTHERWISE PROVIDED FOR
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
PERFORMING OPERATIONS
PUNCHING METAL
ROLLING OF METAL
SOLDERING OR UNSOLDERING
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WELDING
WORKING BY LASER BEAM
title STEEL STRIP FOR ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE, ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE, AND PROCESS FOR PRODUCING STEEL STRIP FOR ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE
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