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Thanks for listing the ASM's tempering chart. If you look at it you will notice that tempering at 100° will give you an as quenched hardness, which will depend on austenizing temperature and rate of cooling and, by the was, Knife Nerds listed Parks 50 as the quenchant except for one instance...

I did check the tempering temperatures for the 8670 on Knife Nerds and you're not even close with the tempers you listed. You could go there or to ASM International. Those temperatures were glaringly different from the other steels that you listed and it seems to me that you had the...

So, 95% certain that it's 4140. Do I see a problem here? Not very much carbon. Doug

Are the surfaces parallel? Doug

I think that Ed Caffrey adapted an oscillating sander to sand his blades with. You might google something like "Ed Caffrey, oscillating sander" and see what you pull up. He also has a page on Knife Network. Doug

That chart is a little confusing because it has the heat treating steps out of order. The tempering temperatures could be more complete and I really question the accuracy of the tempering temperatures and the resulting HRc results for the 8670. Doug

The layering on the blade really makes the knife appearance wise. Doug

My hopes and prayers are for her full recovery. Sorry to hear that she had to go back to surgery to tie off a bleeder but those things happen. Doug

I'm not fond of pocket clips, I think that they were invented to cause people to loose their pocketknives, but that is a very nice looking knife there. Doug

I fancy it too. Looks like you have a carrier ahead of you. Doug

Did you have to turn the blade end of the block to the inside diameter of the lug nut, put the nut over it, roach out the tang hole, insert the tang then use the flats of the lugs as a guide in forming the flats of the handle? Doug

Welcome! Always nice to get a new woman on the board. Doug

Glad you walked away from it. Doug

Prayers for your daughter's recovery and your family's peace of mind. Doug

Not that I know of. If I were needing to have wood stabilized, especially in low volumes I would send it into a professional outfit. Doug

By chisel ground, are you meaning a single bevel? If you are, unless you are making it for a left handed person, I would grind the bevel on the other side. Doug

That is in the ABS Mastersmith class for a fluted dagger. Top of the line artwork. Doug

Good to see you back. Sorry to see that you have had such a hard time with your family losses. May God bless and keep you and see you through this. Another tired old sailor. Doug

At the risk of looking like a smart ass (my ex-wives would agree that that's one of my strong points) may I ask what steel you are treating. With something like 1075 all you are going to do is make your steel real cold with no real benefit for the molecular structure of the steel. Some of you...

That is really superb work; well done. Doug