In Uddeholm’s toughness testing they measured 23J at 59 Rc for Elmax. This is significantly less than even their 10V alternative, Vanadis 8 (40J) at 60 Rc. And of course it’s much lower than Vanadis 4 Extra. It is about equal to Vanadis 60 at 62 Rc. Maybe more people now would be familiar with Maxamet which is roughly equivalent to Vanadis 60 though the Uddeholm steel significantly predates it. Elmax is simply not a very tough steel. I could believe someone finding Elmax to be marginally more tough than some other stainless PM stainless steels since none of them are particularly tough. But Elmax is not in a category all by itself in terms of PM stainless toughness, it’s in the same ballpark as the others.
Sources:
https://www.uddeholm.com/app/uploads/sites/54/2018/05/Tech-Uddeholm-Vanax-EN.pdf.pdf
https://www.uddeholm.com/files/vanadis_60-english.pdf
You have to remember this thread is about comparing Elmax to CoS. In a previous thread, you wrote about CoS:
"Cobalt social steel is a modified 440C with cobalt, moly, and a small vanadium addition. It is cast conventionally. Therefore it has moderate wear resistance., relatively low toughness, and good corrosion resistance."
https://www.bladeforums.com/threads/cpm3v-vs-cobalt-special-steel-lam-cos.1604669/
Then, you just posted a link that shows Elmax, run harder, is still more than twice as tough as 440C.
In the post above, you wrote: "I could believe someone finding Elmax to be marginally more tough than some other stainless PM stainless steels since none of them are particularly tough." Fair enough, but that's what I originally said:Elmax is the toughest of the powder stainless steels other than Vanax SC. If you think Elmax is chippy, as the OP worried, then you'd have to say that all powder stainless steels are chippy, which of course is not true.