I think around 56 to 59 is probably perfect for the tasks I get up to and keeps a reasonable edge which I can strop back. Totally enjoyed the video. Regards Cliff.
The Camillus Jet Pilot Knife is just 54 HRC RR says their 440A is set at 56-58 HRC so it looks like your test is accurate. Marbles is also suppose to be 56-58 so it seems like they are accurate. Thanks William! So true with about go with trusted brands!
Heat-treating metal is not too complicated, making metals hard starts with different mixtures of materials added to iron. Testing the hardness with a metal file shows the steel is harder than file. Files made for cutting metal have a hardness of 65 to 68, tempering reduces hardness to a desired level for different uses. What makes knife steel sharp and cut longer than others are the mixtures of the steel. The steels HRC is just proof of the hardness. The content of hard carbon particles and other hard materials determines how sharp the edge can achieve and how long the edge will last before needing sharpening. Forging steel is a process that changes the grain structure of steel; Hardwood has a tight fine grain structure you can relate this to forging steel. The process used making Japanese swords aligns the grain of the steel in thousands of layers. This is a long and time-consuming hand process. Achieved mechanically, Super steels attempt to make steel using molecular level recipes. I found this on line I think is interesting and funny. In 1914, the George Ibberson & Co, using stainless manufactured by Thomas Firth & Sons, began producing stainless steel knives. The product was not an immediate success, and Brealey soon earned the reputation of being the inventor of the "knife that would not cut". 🐯😆😅
Squirrel!!! Interesting video, thanks, William.
I think around 56 to 59 is probably perfect for the tasks I get up to and keeps a reasonable edge which I can strop back. Totally enjoyed the video. Regards Cliff.
Thank you, Cliff.
I appreciate the demonstration. Hope you're doing well my brother! 😺❤️⚔️👍🏻
Thank you, Stacey. I'm doing OK
Good information and well presented. Thank you.
Thank you, Pocket EDC.
The Camillus Jet Pilot Knife is just 54 HRC
RR says their 440A is set at 56-58 HRC so it looks like your test is accurate.
Marbles is also suppose to be 56-58 so it seems like they are accurate. Thanks William!
So true with about go with trusted brands!
Thank you, Tobias 👍
Thanks for another interesting video!
Thank you, Jimmy J
This was great info, buddy!
Thank you, David 👍
good to know!
Thank you
Heat-treating metal is not too complicated, making metals hard starts with different mixtures of materials added to iron. Testing the hardness with a metal file shows the steel is harder than file.
Files made for cutting metal have a hardness of 65 to 68, tempering reduces hardness to a desired level for different uses.
What makes knife steel sharp and cut longer than others are the mixtures of the steel. The steels HRC is just proof of the hardness. The content of hard carbon particles and other hard materials determines how sharp the edge can achieve and how long the edge will last before needing sharpening.
Forging steel is a process that changes the grain structure of steel; Hardwood has a tight fine grain structure you can relate this to forging steel. The process used making Japanese swords aligns the grain of the steel in thousands of layers. This is a long and time-consuming hand process. Achieved mechanically, Super steels attempt to make steel using molecular level recipes.
I found this on line I think is interesting and funny.
In 1914, the George Ibberson & Co, using stainless manufactured by Thomas Firth & Sons, began producing stainless steel knives. The product was not an immediate success, and Brealey soon earned the reputation of being the inventor of the "knife that would not cut". 🐯😆😅
Thank you, Gizmo. Yes, I read that story before about the stainless steel guy. It sucks to be a pioneer sometimes.
Probably 56 rockwell. 440A is generally run at that hardness
👍