O2 - 1:2842

O2 is a hyperutectic tool steel. It has a carbon content of over 1%. I have used this forever. I only source it from Lohmanns steel or Boker in Austria. This makes a very good blade with very good cutting characteristics and toughness. I can water quench it to get a differential hardness, as seen in the pictures as the lighter grey area near the cutting edge.