Hmm... I've not heard of Muela before. Is there ANY info available online?
Also, can someone say more about the steel? Jailhack notes, "The better ones are stamped with Molibdeno Vanadio, Made in Spain." "Molibdeno Vanadio" is, of course, "Molybdenum Vanadium" -- which is also a common description for a German stainless steel used by many of the brand-name kitchen cutleries (Messermeister, Grohmann; Henckels steel is "proprietary" but apparently a variation).
I tried to find out about this mystery steel while researching new kitchen knives. To the best of my knowledge, it is a German stainless identified as "4/30" or possibly "4/40" steel. 4/30 closely resembles AUS-8A: has 0.7% carbon and slightly higher amounts of the same alloying elements. I take this to mean that it is probably slightly less "tough" than AUS-8A but takes a slightly finer edge (which makes sense for kitchen knives). 4/40 has slightly higher carbon content -- I'd speculate around 0.9-1.0%.
Happy Camper notes that the low-end Muela is made from 440C, treated to 58 RC. At $19 I'd be highly skeptical of that claim. I don't know US Cavalry but it may be casual labelling on their part. Quality of heat treat notwithstanding, if the "Molibdeno Vanadio" used in the high-end Muelas is indeed the same "Molybdenum Vanadium" used by other European manufacturers (i.e., Euro version of AUS-8A), then I doubt Muela would use a higher quality stainless in its lower-end line.
Curious --
Glen
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Y2K complacent