Aichi AUS-10M Knife Steel
Composition Analysis Graph, Equivalents And Overview

AUS-10M(Aichi) - Aichi stain resistant steel. Very similar, both in name and composition to another Aichi product - AUS10 steel. I'm guessing, M stands for either Modified or as an indicator of increased amount of Molybdenum, though in that case Mo would be more justified. That increase is also not guaranteed either. While AUS10 steel states 0.10%-0.30% Molybdenum, AUS10M states 0.20%-1.00%. In other words, you could have a batch of AUS10 steel with slightly more, up to 0.10% more Molybdenum than AUS10M, though officially AUS10M can have up to 1% Molybdenum. Interestingly, the specs for AUS10M do not clearly state the amount of Vanadium in it, it's neither 0 which would indicate absence of it, nor any specified amount. At the same time, AUS10 steel has 0.10%-0.25% Vanadium, which ihas number of benefits for the steel in general, though in this small amount wouldn't be a primary carbide former. I am unaware of any knives made out of AUS10M steel at this moment, although there are far inferior alloys used in all sorts of knives. I suppose, if one has AUS10 steel readily available, no real reason to go for AUS10M.

Manufacturing Technology - Ingot

Country - Japan(JP)

Known Aliases:
Aichi - AUS10M