STEEL STRIP HAVING A LOW SI CONTENT

摘要

The invention provides a dual phase or complex phase steel strip showing no tigerstripes. According to the invention the steel strip having an ultimate tensile strength Rm classifying for 1000MPa steel category, comprises (in mass percent) C 0.09-0.19%; Mn 1.9-2.6%; Si at most 0.1 %; Cr 0.4-0.8%; Mo at most 0.3%; Ni at most 0.4%; Al 0.02-1.3%; and optionally one or more elements selected from the group consisting of: Nb at most 0.08%; P equal to or more than 0.0005%; N equal to or less than 0.015%; Ti equal to or less than 0.1 %; V equal to or less than 0.1 %; B equal to or less than 0.01 %. wherein the sum of Cr, Mo and Ni is at least 0.5%; the balance being Fe and inevitable impurities.