D2 or 4140 for all steel project

4140 composition
C 0.38-0.43
Mn 0.75-1.00
P 0.035 (max)
S 0.04 (max)
Si 0.15-0.30
Cr 0.80-1.10
Mo 0.15-0.2

If it were I, between those two steels I would use 4140 for a tomahawk.
I don't believe the D2 will take the impacts of tomahawk usage.
 
As much as I love D2, this ain't the application for it.
 
neither 5160, (Car or Truck Leaf Spring) or better yet an old American made 24 oz ball peen hammer. pick em up at garage sales all day long for a buck or 2 usually
 
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