It's a Bohler steel not too dissimilar to Crucible's 3V. A bit more of everything, except lacking 3V's small amount of Tungsten and no Silica.
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3v doesn't have tungsten in any composition I have looked at? Vanadis 4e looks like it should have better edge holding then 3v with more carbon and vanadium. If you wanted more toughness I'd say 3v could be better.