[olddog]

David,

I have seen some stainless steel parts, especially as you go up the hardness scale, become notch sensitive and quite brittle. Then if you don't grind the part and carefully remove all stress risers it suddenly snaps like a tooth pick, after some use. I ran into this with a gear pump that used a tool steel up in the rockwell 50 C range (forget the number). Am I comparing apples to oranges?