As I explained to you by phone, we are in the process of buying a new shot peen machine and we are considering changing the type and size of shot. Presently we are using 280 cast steel shot. We are considering using 230 cast steel shot or cut wire shot. I understand that cut wire is more expensive but will last longer. The only concern I have is if we use cut wire the saturation time will be the same as when using cast steel shot. As you know, the Boeing specification requires shot peening time to be saturation or coverage time "whichever is the longest". I know that I will reach coverage faster since we are shot peening aluminum parts but we have to shot peen until our almen strips reach saturation. If someone can answer my question, I will really appreciate it!
By the way, thanks for letting me know about your web page. It is great!