Patent ID: 9593400
Date: 2017-03-14
CPC Classifications: B32B,C21D,C22C,C23C,C23F,Y10T

Claim:
1. A dual phase or complex phase steel strip having an ultimate tensile strength Rm of at least 600 MPa consisting of, in mass percent, the following elements: C 0.08-0.11%; Mn 1.70-1.95%; Si at most 0.08%; Cr 0.5-0.6%; Mo at most 0.3%; Ni at most 1.0%, Al 0.01-1.50%; Nb at most 0.07%; P equal to or more than 0.005%; 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.