RayseM
Platinum Member
- Joined
- Feb 18, 2010
- Messages
- 8,255
I love this image! :thumbup:
The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details:
https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is $300 $250 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
Thank you!I love this image! :thumbup:
So, it is my understanding that HAP40, a tool steel, has just under 5% Cr. My metallurgy is a little rusty (if you'll excuse the pun); I know that chromium increases rust resistance, but what other qualities might that Cr content impart to the steel?
I'm still learning all this, so keep that in mind.
In this steel, probably all the Cr is going towards that top layer of chrome for corrosion resistance. In all tool steels, there is generally between 4-6% Cr. The other alloying elements are creating the carbides. In a steel like ZDP-189 (20% Cr) some of its Cr is used in carbide creation, or to assist in raising the potential final hardness. HAP40 is interesting because it has Cobalt. Cobalt is used for higher red hot hardness which is pointless for a knife steel. However this steel was not ever intended as a blade steel. I'm curious if that Co has other effects on knife edge properties. I'd like to get some M3 which HAP40 basically is with the addition of Co. Do a little usage comparison.
I don't recall noting their densities, but I'm guessing any real difference in a blade that small would only be detectable by a precise scale. Some have suggested they are ground thinner than the normal VG-10 models.The high speed steels also seem a little lighter. I'm guessing because the cobalt displaces a heavier element or elements in the alloy?
Jim and Cole, thanks guys. Looking forward to the feedback.
Stretch, Dragonfly, Manbug, and Ladybug preoders are on the front of the local store's page. Based on past performance for Spyderco coming soon they're just days away.