Maxamet is a non-stainless powder steel from Carpenter (USA steel). It is capable of very high hardness, and it is one of the top choices for the best edge retention available. Some compare it to CPM-S110V in edge retention, but it is still up for debate. Just like S110V though, Maxamet is extremely difficult to sharpen. Maxamet is considered in the top supersteels and is highly sought after.
2.15% Carbon (C), 4.75% Chromium (Cr), 10% Cobalt (Co), 0.30% Manganese (Mn), 0.25% Silicon (Si), 0.07% Sulphur (S), 13.00% Tungsten (W), 6.00% Vanadium (V).