Interesting, I hadn't actually seen a verified steel type before for those. Can I ask - were those with carbide tips or did they have just cut steel tips? I'd have thought 1040 would be a bit low carbon, but maybe hardened hard enough it would stand up ok as a circular blade steel?I had several worn out saw blades made by Leitz, a German mfg. I called their Wisconsin office and learned that the plates were made from 1040. Can’t answer for other manufacturers, though.
Verhoeven shows 1040 maxing out at 52-54 depending on the specifics and treatment https://archive.org/details/Metallurgy_of_Steel_for_Bladesmiths_Others_who_Heat_Treat_and_Forge_Steel_By_Joh/page/n157/mode/2up - pg 155). I suspect its likely a bit brittle around there and likely hard to get it to get that hard very deep into the metal as you'd have to quench it pretty fast to hit the mid 50's... Maybe a blade is thin enough it would mostly through harden.. I'm not sure.. That might actually be mildly advantageous for something like a shop knife though as the rest of it should be fairly ductile so it's less likely to crack if you drop it. For things like marking knives and the like that aren't worked to hard (and you want to have been easy to touch up..) it's probably a decent choice alrightCarbide tips. Its relatively low carbon, but apparently you can get it hardened to something like RC 56 or so. I made a decent shop knife from it, and a friend heat treated it. It holds a decent edge. I also made a couple marking knives. I wouldn’t use that steel for anything I prized highly.
Ryan,I've never even tried A2 Having a pro handle it seems more than entirely reasonable. In general though I've mostly started leaning harder towards ease of sharpening and simpler steels for most things (lathe tools mostly excepted...).
I've done a few things out of really old files (some sort of plain high carbon.. worked decently with out), some O1, a couple of springs, and a few other random similar bits. But that's about it... and that's been a while.
I have a bunch of planer blades that I'd like to know what they are... they seem very thoroughly through hardened (yes I can grind them.. but not quickly or easily). Seem to hold temper pretty well even when I mess up and get them a bit hot and they work really really well for lathe scrapers and yard knives and the like.
Even more so with a forge I miss having a forge!I watched the video last night after I made my previous post. I can see how the metal process would be fun.