The dots on here were from a sheet of results that I got for coupons of O1 and 26c3
Same person did the testing for 1095 for me (63.1 hardness average, 4.3 ft lbs of toughness), I just didn't get individual results, probably because he's busy - so I have the individual samples for the first two and 1095, just the sample averages).
I have an iron in my number 6 like this. Hard, nice working iron. Just slightly lacking in toughness. I checked larrin's schedule of toughness for hardness - it might improve just a little with another 25-50 degrees of tempering, or it might not make a difference - some steels gain toughness fast, and some don't or even go backwards. 1095 above 60 has only a gradual improvement in charted toughness from where this is tempered to a few points softer. I haven't done it yet. I can make one of these irons in less than an hour from sheet, so I don't have any reason not to look further, I guess.
They do warp. I vaguely recall people complaining about the flatness of the early WR irons. The answer isn't as simple as making 1095 thicker and grinding it back as a sample thicker than 1/8th will probably be harder on the surface.
The other thing I'd wonder with the WR irons is if they're fully hardened up to the slot - getting the slot in the quench increases warpage in a way that's not easy to deal with and greatly increase the chance that a crack will occur from the keyhole bottom into the middle of the iron.
Weird thing about the chart above - 26c3 definitely has the coarsest looking grain due to the excess carbon. Larrin (I think it was larrin) suggested that maybe the lack of a soak resulted in getting less carbon in solution (vs. in carbides) and that usually leads to better toughness.
My samples were better than his furnace samples
1095 is harder than his chart and ever so slightly under toughness (but may be where it would be).
For 1084, I had an outright failure with hardness at 61.6 and toughness at 3.4. I'm sure it's solvable. I do have a separate 1084 iron (our maybe four of them). If they suffer from anything, it's the early ones that I made before getting the right quench oil - they're just a little soft. I probably bungled the coupons by overheating and undertempering them - I don't remember aside from not being as careful with 1095 and 1084.
The novelty here for me is to find something like 1095 that has a tiny bit of chromium and maybe a small addition of silicon for toughness. Like a 1% version of 26c3. I'm not aware of any such thing being available, but I think something like that would result in a very good high hardness carbon steel plane iron....for people who think the alloying in O1 is too much.
Same person did the testing for 1095 for me (63.1 hardness average, 4.3 ft lbs of toughness), I just didn't get individual results, probably because he's busy - so I have the individual samples for the first two and 1095, just the sample averages).
I have an iron in my number 6 like this. Hard, nice working iron. Just slightly lacking in toughness. I checked larrin's schedule of toughness for hardness - it might improve just a little with another 25-50 degrees of tempering, or it might not make a difference - some steels gain toughness fast, and some don't or even go backwards. 1095 above 60 has only a gradual improvement in charted toughness from where this is tempered to a few points softer. I haven't done it yet. I can make one of these irons in less than an hour from sheet, so I don't have any reason not to look further, I guess.
They do warp. I vaguely recall people complaining about the flatness of the early WR irons. The answer isn't as simple as making 1095 thicker and grinding it back as a sample thicker than 1/8th will probably be harder on the surface.
The other thing I'd wonder with the WR irons is if they're fully hardened up to the slot - getting the slot in the quench increases warpage in a way that's not easy to deal with and greatly increase the chance that a crack will occur from the keyhole bottom into the middle of the iron.
Weird thing about the chart above - 26c3 definitely has the coarsest looking grain due to the excess carbon. Larrin (I think it was larrin) suggested that maybe the lack of a soak resulted in getting less carbon in solution (vs. in carbides) and that usually leads to better toughness.
My samples were better than his furnace samples
1095 is harder than his chart and ever so slightly under toughness (but may be where it would be).
For 1084, I had an outright failure with hardness at 61.6 and toughness at 3.4. I'm sure it's solvable. I do have a separate 1084 iron (our maybe four of them). If they suffer from anything, it's the early ones that I made before getting the right quench oil - they're just a little soft. I probably bungled the coupons by overheating and undertempering them - I don't remember aside from not being as careful with 1095 and 1084.
The novelty here for me is to find something like 1095 that has a tiny bit of chromium and maybe a small addition of silicon for toughness. Like a 1% version of 26c3. I'm not aware of any such thing being available, but I think something like that would result in a very good high hardness carbon steel plane iron....for people who think the alloying in O1 is too much.