HIGH STRENGTH AND HIGH TOUGHNESS STAINLESS STEEL SHEET FOR BUILDING STRUCTURE, PRODUCTION THEREOF AND BUILDING STRUCTURE USING THESE

摘要

PROBLEM TO BE SOLVED: To provide a high strength and high toughness stainless steel sheet for building structure, to provide products thereof and to provide building structures using these for columns, beams or the like. ;SOLUTION: In Cr steel contg., by weight, ≥10% Cr, the crystal stricture in the metallic part is formed of two phases of ferritic phases by 50% area ratio in the cross-section, and the balance martensitic phases or of martensitic single phasess. This steel preferably contains 0.005 to 0.03% C, 0.05 to 1.0% Si, 0.05 to 2.0% Mn, 10 to 16% Cr, ≤2.5% Nu and 0.005 to 0.03% N, contains, at need, one or two kinds of ≤2% Mo and ≤2% Cu, and the balance substantial Fe with inevitable impurities. By this high strength stainless steel tube, the provision of a structural member usable in parts requiring corrosion resistance including coastal areas is made possible.;COPYRIGHT: (C)1999,JPO