Thin 3V vs. thicker carbon?

C

chugokujin

Joined
Dec 21, 2002
Messages
556
Hi,

I am currently on the waiting list like many here for the Koster Bushcraft blade in 3V. I am also expecting a Skookum Bush Tool in A2. It seems the "general say" is that 3v is 100% tougher than O1 or A2 (in same thickness) by experts.

So, practically speaking, does this mean an 1/8" thick 3v blade will be as tough or tougher than say a thicker blade in O1 or something similar??

Just wanted to get some thoughts here as some of you may have knives in
3V. The Koster Bushcraft will be my first in 3V. Thanks.
 
Your questions assumes a linear relationship between thickness and toughness -- a blade twice as thick is twice as strong. Imagine comparing a quarter-inch-thick blade to a half-inch-thick blade in the same steel. I'd expect the half-inch-thick blade to be way more than twice as strong.
 
I have a Krein Micro Chef in CPM 3V. You are going to love CPM 3V....a little tougher to sharpen, but sure makes for an incredible edge.
 
Hardheart,

I believe the SBT is around 59-60 rc. So by your numbers presented, it does seem nearly twice as tough. Perhaps I am seeing this the wrong way, but, would it mean it would take twice the amount of A2 in thickness to be as strong?

Twindog, I know its an assumption and that it may be wrong, thats why I was curious. I would agree with the comparison you gave. But, if material "a" is 100% tougher than "b", wouldnt that mean it would take twice as much of "b" to make it formidable to "a" ?? Or is this too simplistic??
 
I think it's cubic, if you went to twice the thickness, you'd get eight times the stiffness or something.
 
Tensile Strength and Yield Strength are measured in force / area (lbs/square inch for example. The increase in those will be proportional to the increase in cross sectional area. Impact toughness is also measured the same way so decreasing the thickness actually decreases the impact toughness also. What the added impact toughness will do with a thinner blade is make it more likely to bend than break when it gets beyond its yield strength limit.
 
Twindog said:
Your questions assumes a linear relationship between thickness and toughness -- a blade twice as thick is twice as strong. Imagine comparing a quarter-inch-thick blade to a half-inch-thick blade in the same steel. I'd expect the half-inch-thick blade to be way more than twice as strong.
Click to expand...

I'm no knifemaker, just a humble solid state physicist. However, I did sleep in a Holiday Inn last night ... and I endorse Twindog's thought process! :D
 
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