The blade is O1 tool steel with a 28degree flat over hollow grind (modified scandi)
O1 tool steel has a rich long history in wood working tools. The steel has a wonderful balance of edge retention and sharpenability.
The 3inch blade is one of my personal favorites for spoon carving. It has enough length to make large slicing cuts when roughing things out and it's short enough for me to get in close with the blade tip for those tight curves when doing the final finishing.