Patent ID: 6027581
Filing Date: 2000-02-22
Classification: C21D,C22C

Abstract:
A cold rolled steel sheet comprising about:C: above 0.015 to 0.150 wt %;Si: 1.0 wt % or less;Mn: 0.01 to 1.50 wt %;P: 0.10 wt % or less;S: 0.003 to 0.050 wt %;Al: 0.001 to below 0.010 wt %;N: 0.0001 to 0.0050 wt %;Ti: 0.001 wt % or more andTi(wt %)/[1.5.times.S(wt %)+3.4.times.N(wt %)].ltoreq.about 1.0; andB: about 0.0001 to 0.0050 wt %;and the balance substantially iron with incidental impurities, said cold rolled steel sheet having a tensile strength not greater than about 327 MPa.