Uddeholm 26C3 is a good steel for fine cutting knives and razors due to its fine microstructure, low impurities, and high potential hardness. It also offers surprisingly good toughness compared to other steels considering its very high carbon content. Based on our toughness testing a heat treatment is recommended using 1475°F for 10 minutes followed by quenching in fast oil. The recommended tempering range is 300-350°F though both higher and lower is possible for certain knives. It is not recommended to temper above 450°F (tempered martensite embrittlement) or below 200°F (not tested).
Now they are getting into steels I have less experience with. Interesting stuff though.View Linked Article