Max/Min Rounded  
Axis Minimum and Maximum values, when Automatic, can also be automatically calculated to show a "rounded" value.

For example, if a Series has values from 12 to 95, the axis Minimum rounded will be 10 and the Maximum rounded will be 100.

Chart1.Axes.Left.MaximumRound := True;
Chart1.Axes.Left.MinimumRound := True;