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H34A(Hitachi) - Added based on the reader submitted info, but unfortunately, exact composition is unknown. If you have more precise info, please do contact me.
TiN particle dispersion type super-hard sintered alloy. Patented(or patent is still pending) alloy. I'm just assuming based on the TiN denomination that the alloy is actually Titanium based. Might be wrong though, and alloy can be any other metal based, with TiN dispersion. Max working hardness is stated as 72HRC, which is very high. As a reminder, Rockwell C scale, officially maxes out at 70HRC, so 72 is an extrapolation. Anyhow, it's very high.
For more metallurgically inclined, few more bits of data: Flexural strength: 2.0 GPa; 10R impact value: 60000 J/m2; Relative density: 100%. So far, the only known knives from H34A were made by Kitano Katsumi in collaboration with Moriya Cutlery Laboratory (Japan). A limited series of 10 folding knives. No reports on their performance. Apparently an expensive alloy. What I do know, sintered alloys are not a good choice for knife blades, issues with thin edges. Not sure what H34A can do though, not enough info. At 72HRC, it isn't gonna be an easy one to sharpen, but with proper sharpening that shouldn't be an issue.
TiN particle dispersion type super-hard sintered alloy. Patented(or patent is still pending) alloy. I'm just assuming based on the TiN denomination that the alloy is actually Titanium based. Might be wrong though, and alloy can be any other metal based, with TiN dispersion. Max working hardness is stated as 72HRC, which is very high. As a reminder, Rockwell C scale, officially maxes out at 70HRC, so 72 is an extrapolation. Anyhow, it's very high.
For more metallurgically inclined, few more bits of data: Flexural strength: 2.0 GPa; 10R impact value: 60000 J/m2; Relative density: 100%. So far, the only known knives from H34A were made by Kitano Katsumi in collaboration with Moriya Cutlery Laboratory (Japan). A limited series of 10 folding knives. No reports on their performance. Apparently an expensive alloy. What I do know, sintered alloys are not a good choice for knife blades, issues with thin edges. Not sure what H34A can do though, not enough info. At 72HRC, it isn't gonna be an easy one to sharpen, but with proper sharpening that shouldn't be an issue.
Manufacturing Technology - PM
Country - Japan(JP)
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