GALVANIZED STEEL SHEET

Abstract: this galvanized steel sheet includes: a steel sheet; and a galvanized layer provided on the steel sheet, wherein a microstructure at a � depth of a sheet thickness from a surface of the steel sheet includes, in terms of area %, ferrite: 2.0 to 25.0%, bainite: 10.0% or less, tempered martensite: more than 60.0% and 93.0% or less, and retained austenite: 5.0% or more, and an area ratio of the austenite, which is in contact with a 30� grain boundary, which has an mn concentration of 1.2 times or more an average mn concentration, and which has a grain size of 0.3 to 2.0 �m, is 3.0% or more.

Inventor(s): Shohei YABU

CPC Classification: C22C38/06 (ALLOYS (flints ; treatment of alloys , ))

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