Hi Rich,
You can get the axis range after the chart is recalculated for a given size (that's because the automatic step is calculated depending on the range of the data and the size of the axis on the screen/printer etc.):
nChartControl1.RecalcLayout();
NRange1DD axisRange = nChartControl1.Charts[0].Axis(StandardAxis.PrimaryY).Scale.RulerRange;
Currently there is no way to determine the automatic step.
Best Regards,
Nevron Support Team