Thank you for your responses repicker and dbooker630. I will try a sample piece from a different bar. If this does not work, I will go ahead and look into the microstructure analysis. It might be that I'm not getting the correct material from my supplier.
Thank you!
I'm thinking decarb as well. I was talking to one of the heat treatment/hardening shops here in town and they suspect there's something wrong with the material itself.
We heat it up to 1600 and quenched it in water and it did not even crack or anything which you would expect for 4140. This was...
Hello,
I am trying to harden a 4140 bar to RC 52-55. Is there a reason why the surface hardness on this bar would be so low (RC 10) compared to the hardness at a depth of .050 in where the hardness reaches 52?
Any help will be appreciated.
Thanks!
