Low-chromium-content stainless steel with excellent corrosion resistance of weld

A stainless steel having an optimal low chromium content is provided in which a weld formed by multipass welding is prevented from deteriorating in corrosion resistance by martensitic transformation and the weld has excellent resistance to intergranular corrosion even in a severe corrosive environme...

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Bibliographische Detailangaben
Hauptverfasser:	FUKAYA, MASUHIRO, TERAOKA, SHINICHI, SAKAMOTO, SHUNJI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS 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 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
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Beschreibung
Zusammenfassung:	A stainless steel having an optimal low chromium content is provided in which a weld formed by multipass welding is prevented from deteriorating in corrosion resistance by martensitic transformation and the weld has excellent resistance to intergranular corrosion even in a severe corrosive environment. The heat-affected zones, which adjoin the bonded area, suffer no preferential corrosion. The stainless steel has excellent manufacturability. The low-chromium-content stainless steel contains, in terms of mass%, 0.015-0.025% C, 0.008-0.014% N, 0.2-1.0% Si, 1.0-1.5% Mn, up to 0.04% P, up to 0.03% S, 10-13% Cr, 0.2-1.5% Ni, and 0.005-0.1% Al and further contains Ti in an amount of 6×(C%+N%) to 0.25%, with the remainder comprising Fe and incidental impurities, the contents of the elements satisfying given relationships.