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1500 is a good starting point. If you want to experiment, you can go lower, but that would take some practice and a chemical breakdown for your batch. 1500 works fine and should do all that is needed.

Which one you choose may depend on you're market. Some people just don't like stainless, some just don't like carbon. Price difference seems negligible, a dollar or 2 per piece for those two steels, with AEB-L being slightly more expensive. Performance differences for the end user will be...

What kind of stock did you use? By that I mean precision ground, hot rolled, cold rolled, etc.

Are the belts cooled? The only time I power sharpened them was on a water cooled wheel. A rather large burr was there but was easily removed.

Search around on some of the other forums for information on batch treatement. Peters specifically had some information that they were using austenizing temperatures that were higher than typically recommended for some steels, enough that some other makers started to question it.

How are you all sharpening AEB-L that there is such a tenacious burr? Similar steels I've worked with sharpening wise were super easy to deburr and sharpen.

I think I know there problems, but there may be more that I don't know about. A fellow I talked to briefly said he quenches from 1600 ish with his 1095. I figure lots of RA, some grain growth, lower carbide volume, less wear resistance, lots of plate martensite and associated loss of...

Any insights on what would happen if 1095 were hardened from 1575-1600 instead of 1475?

PM or email me. I have a couple labs that will analyze anything from steel filings to bulk samples. I don't want to give their stuff out publicly though.

How did you arrive at those temperatures? The normalizing and annealing seem low, and may not have done much on a steel like S90V, or at least not done what you intended. I've have little experience testing hardness with files, but I generally hold them to have a wide margin of error...

Can you give approximate temperatures for the forging, annealing, normalizing, and hardening?

You are forging S90V? Are you heat treating/annealing/normalizing with the forge also? You are new to S90V? What steels are you familiar with?

Why are normalizing S90V?

Meant to post this earlier, but think of this as an air hardening version of 5160 with better wear resistance, particularly with the A8 Modified.

What doesn't make sense about the graph for toughness? You've pretty much nailed it so far. It's hard to tell how this compares to other steels, as this is the first chart I've seen of toughness in a blade steel using v-notch testing. Most steels won't register on that test, blade steels at...

I'd have to reread it at this point, but I don't think they were ignored. It might be that they need some temperature resistance for their intended purpose and thus the low tempering range is not an option. In any case, cryogenic treatment and results are highly specific to steel and...

Waiting to temper isn't advised, but sometimes it's unavoidable. Quenching after temper is even recommended in some circles.

Thats some pretty good information. It appears the secondary hardening in the non-CT pieces made out paces the as quenched hardness gains whwn tempering at the same temperature. Were it heat treated as bossdog did, with cryo and a low temper, the cryo'd samples likely would have been ahead.

The stuff I read indicated the eta carbides did not form directly from the cryo treatment, but the ultra cold temperatures conditioned the martensite and led indirectly to the formation of eta carbides during tempering.

Do you have any examples of the changes that could be made and then buried to make hardness go down after cold/cryo treatment? Is anyone actually claiming the hardness goes down after cold/cryo? If so, did they give an explanation or mechanism as to why?