viper
Titanium
- Joined
- May 18, 2007
- Location
- nowhereville
Just curious if there any rules of thumb or alternative hardness tests for case hardened parts where the case thickness is unknown? We had a few parts Rockwell tested and my scratch tests just do not line up with what they sent back. I think the surface is a good bit harder and I have heard that trying to test rockwell on cased parts just crunches the outer shell and will lie every time. Is that accurate? Is the scratch testing a bit more accurate?
I realize scratch testing is not "calibrated" but sometimes getting in the ball park is all we need. I use some certified materials in the shop to compare to as well as HSS, carbides, etc. What else could we look at?
I realize scratch testing is not "calibrated" but sometimes getting in the ball park is all we need. I use some certified materials in the shop to compare to as well as HSS, carbides, etc. What else could we look at?
