Patent ID: 8889264

Claim:
A hot dip Sn-Zn plated high strength steel sheet for press forming, superior in low temperature toughness, comprising a cold rolled steel sheet and a hot dip plated layer formed on the surface of the cold rolled steel sheet, the cold rolled steel sheet comprising, by mass %, C: 0.0005 to 0.0050%, Si: 0.61 to 1.0%, Mn: 0.70 to 1.39%, P: 0.05% or less, Ti: 0.010 to 0.018%, Nb: 0.010 to 0.040%, B: 0.0007 to 0.0021%, S: 0.010% or less, Al: 0.01 to 0.066%, N: 0.0010 to 0.0041%, and a balance of Fe and unavoidable impurities, wherein P is present in an amount of [P]≦10×[B]+0.03, wherein [B] is the B content in mass percent, and [P] is the P content in mass percent.