The present invention provides high burring, high strength steel sheet
excellent in softening resistance of the weld heat affected zone and a
method of production of the same, that is, high burring, high strength
steel sheet excellent in softening resistance of the weld heat affected
zone containing, by wt %, C: 0.01 to 0.1%, Si: 0.01 to 2%, Mn: 0.05 to
3%, P.ltoreq.0.1%, S.ltoreq.0.03%, Al: 0.005 to 1%, N: 0.0005 to 0.005%,
and Ti: 0.05 to 0.5% and further containing C, S, N, Ti, Cr, and Mo in
ranges satisfying 0%