Hello Everyone,
It's been a while since I've made anything with 52100, and considerably longer since I've made a sujihiki, but here we are. I did some in-forum reading on what people seem to value most in a suji, and it came down to a fine edge, a consistent taper, and limited flex, and so I've done my best to meet those criteria on this blade. I left the steel very hard, 65 hrc, to maximize the steel's slicing edge retention. You may, quite understandably have qualms about 52100 this hard, and personally I've never seen a blade in 52100 run at 65hrc, however this chart:
https://i0.wp.com/knifesteelnerds.c.../2021/07/apex-ultra-toughness.jpg?w=760&ssl=1
indicates that even at 65hrc, 52100 is in the order of 4x tougher than blue super at the same hardness, so toughness shouldn't be a issue.
It's been a while since I've made anything with 52100, and considerably longer since I've made a sujihiki, but here we are. I did some in-forum reading on what people seem to value most in a suji, and it came down to a fine edge, a consistent taper, and limited flex, and so I've done my best to meet those criteria on this blade. I left the steel very hard, 65 hrc, to maximize the steel's slicing edge retention. You may, quite understandably have qualms about 52100 this hard, and personally I've never seen a blade in 52100 run at 65hrc, however this chart:
https://i0.wp.com/knifesteelnerds.c.../2021/07/apex-ultra-toughness.jpg?w=760&ssl=1
indicates that even at 65hrc, 52100 is in the order of 4x tougher than blue super at the same hardness, so toughness shouldn't be a issue.
- Blade: 280mmx41mm 52100 (65hrc) 600 grit hand finish
- Neck: 17mmx22mm
- Handle: 127mm, tapering from 24.0mmx19.8 to 22.5mmx19.0mm, scorched oak, oiled and waxed
- POB: 70mm from handle
- Spine: 2.6mm at the neck, 2.2mm at 15cm, 1.1mm 1cm from the tip
- Grind: flat to convex
- Weight: 166 grams
- Relieved choil and spine
- Edge: .1mm tapering to zero at half way
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