Patent ID: 9695493
Date: 2017-07-04
CPC Classifications: B32B,C21D,C22C,C23C,C23F,Y10T

Claim:
1. A steel strip having an ultimate tensile strength Rm of at least 1000 MPa, consisting of (in mass percent) C 0.09-0.19%; Mn 1.9-2.6%; Si at most 0.1%; Cr 0.4-0.8%; Mo 0.003 to 0.3%; Ni 0.022 to 0.4%; Al 0.02-1.3%; Nb at most 0.08%; P 0 or 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.