M390 vs 3V vs M4 Data?

[gga357]

Anyone have data on toughness? Ideal would be a datsheet that has a direct comparison of a charpy testing of all 3.

 

[Chipped Karambit]

Ii will post what I have. none directly comparing though
some comparison
http://www.knifeblog.com/knife-steel-comparison-charts/
M390 info
http://www.kau.se/sites/default/files/Dokument/subpage/2010/02/26_349_359_pdf_19432.pdf
http://www.bucorp.com/files/BOHLER_M390_KNIFE.PDF

M4:
http://www.crucible.com/PDFs/DataSheets2010/dsM4v1 2010.pdf

I know nothing of 3v because i dont own it or dont intend to spend that much on a fixed blade (buying my first busse later and calling it finished on fixed blades)

 

[gga357]

Thank you. From that data the best I can get (interpolate/guess) is that M390 is around 25 ft-lbs at its optimum HT(for both toughness and slicing). Seems to place it very close to CPM-M4. Maybe slightly more abrasion resistant and maybe slightly less tough.

 

[mete]

Please don't take those numbers as absolutes -it doesn't quite work like that.
I have a nice custom 8" chopper and that's a fine use for the steel. I don't know if I'd pick that for a 4" slicer type [typical hunting knife].

 

[gga357]

Which numbers?



The question is what type of test was used to get the impact numbers. At 500 degrees C temper you get 62RC, and about 35j. 3j = 26ft-lbs.