Please specify acceptable heat treatments for the 17-4PH steel parts.
After some further analysis on this at at Humotech, we’ve determined H900 is necessary for some/all of the OSL parts. Other common variations of 17-4PH such as H1150D have yield stresses significantly lower than necessary.
Recommended guide to the different sub-types of 17-4PH: https://www.rolledalloys.com/wp-content/uploads/17-4_Data-sheet-rolled-alloys.pdf