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Blue Super has a Rockwell rating of 63-64 HRC.
Sharpness - 4/5 Second only to premium White steel No.1 (which incidentally is poor for retention). Most carbon steels score 4 here.
Sharpening - 3/5 slightly harder to sharpen than most premium carbon steels, but exceptionally good at retaining the edge
Retention - 5/5 This is the highest score, an exceptional ability to retain sharpness
Please see our Steel Types Guide for further information to help with choosing the right knife for you, or drop us a call or email to discuss.