[MW:23133] cladding of spherical surfaces by stellite

Dear Experts;

My ball valve vendor claims that "it is not recommended to clad ball part of ball valve by stellite", I am looking for a reference to find is there any specific  limitation for this material.

The ball material is "SS316L".

If yes, is this limitation applicable for other stainless steel material like "13%Cr".

Thanks

Himan Nikdin