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|1. (WO2018043453) THIN STEEL SHEET AND PROCESS FOR PRODUCING SAME|
|Applicants:||JFE STEEL CORPORATION
|Title:||THIN STEEL SHEET AND PROCESS FOR PRODUCING SAME|
Provided are: a thin steel sheet having a tensile strength of 950 MPa or higher and satisfactory toughness; and a process for producing the thin steel sheet. The thin steel sheet is characterized by having a specific composition and a metallographic structure that comprises up to 30% (including 0%) by area ferrite, at least 70% (including 100%) by area tempered martensite, and up to 4.5% (including 0%) by area retained austenite, the tempered martensite grains containing iron-based carbide grains precipitated therein, wherein 10% of the iron-based carbide grains ranging from the largest in grain diameter have an average aspect ratio of 3.5 or higher.