One of our customers has quesioned the affect on the corrosion resistance and the ISO15156 compliance of Nitrocarburizing 625 weld overlay on F22. Anyone have any thoughts?
We often use a 625 weld overlay on 8630 components that need to comply with API 6a and NACE MR 01-75 and we are finding a serious reduction (10% to 20%) in the yield stress of the underlying material. Does anyone know of a way to recover this whilst maintaining the NACE compliance?