Sorry probably not explained myself well. At present we do not do any shotpeening, we have a new machine which is to be commissioned soon, and therefore we have yet to run any saturation curves.

The disagreement is that our customers specification states a typical shot size and intensity as stated in my first post, but we will not be using cast shot so are looking for the CW alternative. The consultant is refereing to ASM2430 & J441 for the CW equivalent to our customer typical shot type and therefore states:

S780 = CW96 (2.4mm)
S330 = CW41 (1.0mm)
S110 = CW14 (0.35mm)

Whereas the shot supplier is stating:

S780 = 2.0mm
S330 = 0.8mm
S110 = 0.4mm