Ferritic steel sheet excellent at strain rate sensitivity of the flow stress, and automobile utilizing it

摘要

The present invention provides a ferritic steel sheet, the quasi-static strength of which is enhanced and further the dynamic strength of which is not lowered. There is provided a ferritic steel sheet excellent at strain rate sensitivity characterized in that: Co and/or Cr are contained at pot less than 0.01 mass % and not more than 4.0 mass % in total in the state of solid solution in the ferrite phase.