Cts-xhp vs Aus-8 Edge Retention and Toughness

K

KnifeNewb

Joined
Mar 24, 2015
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5
Hi everyone, I'm planning to get a CS Ak-47. But I'm having a hard time deciding what steel.

I heard what with knife steels, everything is a trade-off; as edge retention increases, toughness decreases.
If this is true, would that mean that cts-xhp is less tough than aus-8?
 
No. That's how it works for a single steel type. For example in you temper 1095 to 60HRC it will be less tough than if it was tempered to 58HRC.

On the other hand different steel types can give greater or lesser toughness at the same hardness. For example if both AUS8 and XHP are tempered to 60HRC the XHP will be tougher. I don't think Cold Steel are making the knives much harder. They're just making them tougher and more resistant to wear so they retain the edge longer.
 
Our XHP knives are around 60-61HRC.
In our tests we found the newer models to have significant increases in edge retention and in general toughness under prolonged abuse.
We're very happy with them.

I'm a real fan of the old 8A. I like it a lot, but there's no doubt the new XHP holds an edge a lot longer
I hope that helps
Thanks and have a great day
 
Cold Steel Knives said:
Our XHP knives are around 60-61HRC.
In our tests we found the newer models to have significant increases in edge retention and in general toughness under prolonged abuse.
We're very happy with them.

I'm a real fan of the old 8A. I like it a lot, but there's no doubt the new XHP holds an edge a lot longer
I hope that helps
Thanks and have a great day
Click to expand...


I have to agree on both counts. I've had a couple of the XHP knives (Recon1 Tanto and AK-47) since they were introduced last June at Blade. The new XHP steel is an improvement to what has already proven to be hard use winners for Cold Steel.
 
Looks like its an ak 47 xhp for me then!!
Thanks for your guys' help.

And thank you CS for upgrading your awesome knives!!
 
ourgon said:
To which well known steel you can compare CTS-XHP? 154CM?
Click to expand...

It can be considered either a high hardness 440C stainless steel or a corrosion-resistant D2 tool steel as per Carpenter.

http://www.alphaknifesupply.com/Pictures/Info/Steel/CTSXHP-DS.pdf

Comparison to CPM-D2 and 440C

http://zknives.com/knives/steels/steelgraph.php?nm=CPM D2,XHP,440C&ni=274,6115,420&hrn=1&gm=0

Patent covering the ranges than can be used in the steel. Dates back to 1993.

http://www.google.com.ar/patents/US5370750
 
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