SG3 steel?

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Apparently there is a mysterious successor to the SG-2 steel now, saw it on Takeshi Saji’s outdoor knives, any informations on it?
 
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Kiku Matsuda has some too
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Yeah, I have been following this. They posted these as-quenched hardness curves recently showing a peak hardness of around 66RC at (1975F) 1080C which is indeed quite hard for a stainless steel. If this is the industrial "Sub-Zero" treatment and not LN2 it could indeed be capable of even harder than that.

If their sales text has any weight metallurgically (which granted it may not), to me it suggests that the steel has relatively low carbide volumes to maintain easy forging but has been engineered for a strong matrix (high carbon balance for stainless steel? maybe some elements for solid solution strengthening? Cobalt?). With every little bit of info they release we can start to narrow this down.

On the other hand, it could be nothing more exotic than SG 2 with 14% Cr instead of 14-16%.

All will be revealed in time, or if someone wants to gift me a sample.
 
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