154cm HT question

As long as you're not overheating it, you won't have any trouble. Maybe someone on the forum with an RC tester would be willing to put a dent in it for you and help figure out the story. Right now, I no longer have access to one.
 
Good point. My spec sheets show low austenizing of S90V at 2100 and S110V at 2150. Don't see much of those but it's possible.
 
Crucible's datasheets show 2100-2150 for S90V, but you'll see that in their impact toughness tests that they actually austenitized at 2050. My printed 420V datasheet shows the same data. My little stainless heat treating chart from them shows 1950-2150 as the austenitizing range. Could both be typos, of course, but I think they are just low (and not recommended) austenitizing ranges for the steel.

There are, of course, other high heat alloys such as the M series steels. But I think one would have noticed the difference. BG42 might not be noticeable, except that it grinds so well annealed.
 
Frank,
While test files are nice to get a feel on an edge, you really need to run by a shop with a Rockwell tester or you are just shooting in the dark. It certainly sounds like there is some problem, but without a "real" numbers test, you don't know what amount of problem it is. With those numbers and the info you have posted, you can call the steel supplier and arrange to send a sample back to be tested. If they don't gladly agree to do that and replace the steel, find another supplier.
 
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