440A vs 440C?


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.cheese.
July 8, 2007, 10:37 PM
Anybody know the difference in these two versions of 440 steel?

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RyanM
July 8, 2007, 10:48 PM
440C has a much higher carbon content. Just off the top of my head, I believe A has a carbon content of 0.60% to 0.80%, while C is 1.00% to 1.20%. There's a slight difference in chromium as well, I think. Overall, 440C will generally be harder than 440A, but both steels are good for knife blades.

hso
July 9, 2007, 01:18 AM
Ryan is pretty much correct.

The only thing I wouldn't agree with is that 440A makes a good blade steel. The carbon content is low enough that it won't harden well or hold an edge very long with use.

OTOH, if you're in a situation where ease of sharpening is of primary importance the A will sharpen easier than C. http://spyderco.com/edge-u-cation/index.php?item=3

sonofodin
July 9, 2007, 12:02 PM
Grade: Carbon Manganese Chromium Molybdenum

440A - 0.65-0.75 / 1.0 / 16.00-18.00 / 0.75

440C - 0.95 - 1.20 / 1.0 / 16.00-18.00 / 0.75

I Rock.

MarshallDodge
July 9, 2007, 01:02 PM
I don't know the difference but I can tell you that the blade on my Benchmade Griptillian is 440C, holds a good edge, and is easy to sharpen.

sonofodin
July 9, 2007, 01:11 PM
That sentence is redundant. The 440C blade on your pocket knife is 440C. Well...right. Only saying to help, no offense meant.

MarshallDodge
July 9, 2007, 01:46 PM
That sentence is redundant. The 440C blade on your pocket knife is 440C. Well...right. Only saying to help, no offense meant.

Thanks, I got interrupted in the middle of typing and didn't proofread. :banghead:

sonofodin
July 9, 2007, 02:04 PM
No problem Marshall. I got mostly A's in English all the way to college. Well...B's in college..anyways, I have a habit of proof reading everything before I submit it. No need to bang your head on a brick wall my friend.

Valkman
July 9, 2007, 03:12 PM
440C is good steel and is really good for knives that will be in salt water applications. 440A is the crap they call "440" on the cheap knife shows hoping you'll mistake it for 440C.

Boats
July 9, 2007, 03:27 PM
I agree. 440A is glorified 420HC. It's a low end alloy that trades off of the better reputation of 440C

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