Immense thanks for the prompt & specific reply. I will follow these lines.

Further,
Any "Good Amps" guide for Shot Peening?

What can be a "good amps" range for Shot Peening round Steel Plates (3mmthick) at 46HRc with S230 Shots also at 46HRc?

What can be called as higher & Lower limits of Amps for useful Shot Peening with the above process parameters.