GrinningIdiot,
Do you have a reference for the Cr being bound up as nitride at temp over ~450C and how much is bound up and to what penetration? Thank you for the replies, I will look into checking microstructure.
S level is 0.030 max. Supposedly the process wasn't getting too hot, when I asked about it. Some other details, penetration is to .005 and part also had elongated swirls down the ID - like a barber shop poll.
I am having a problem with pitting about .001 to .002 deep on commercial grade 304 tubbing, 4"OD X .375" wall, appearing after a plasma nitriding process. I have plasma nitriding done on a barrel I make from 17-4 but only get light pitting maybe about .0005 deep at the most. The engineer at the...