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5160 can get hard enough, but hardness is not everything. The greater amount of carbon in a high carbon steel makes for a more abrasion resistant steel.

I have not made a razor from 5160, but I...

I feel like we need one of those, nothing to see here, lets move along post.

I am not sure what to say, I speak in the videos, as I understand the process. I feel pretty comfortable with my heat treating process and knowledge.

I am not sure where I am way off in my...

In my experience I get a smoother/more comfortable edge on a tempered blade.

I am not exactly sure why, but I would surmise that the tempered blade edge is a little more resistant to crumbling at...

The geometry is about 16ish degrees, or 3.5 or 4 in blade width to 1 in spine thickness.

Charlie

https://youtu.be/isPvvVdyQio