HIGH-STRENGTH MULTI-PHASE STEEL, AND METHOD FOR PRODUCING A STRIP FROM SAID STEEL

摘要

A high-strength multi-phase steel having tensile strengths of no less than 580 MPa, preferably with a dual-phase structure for a cold-rolled or hot-rolled steel strip having improved forming properties, in particular for lightweight vehicle construction is disclosed, containing the following elements (contents in % by mass): C 0.075 to≰0.105; Si 0.200 to≰0.300; Mn 1.000 to≰2.000; Cr 0.280 to≰0.480; Al 0.10 to≰0.060; P≰0.020; Nb≧0.005 to≧0.025; N≧0.0100; S≧0.0050; the remainder iron, including conventional steel-accompanying elements not mentioned above.