Patent ID: 10519525

Abstract:
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.