Who has some O1 goodness to share?

J. Oeser said:
I have wondered that too. I think that 1095 is just so cheap and easy to use for mass production that most manufacturers use it over O1. That just leaves custom makers to get O1 and a majority of people want some type of stainless on their customs. IMO, O1 is a very under-rated and underused steel.

Here is an interesting bit of info on O1. At 63 RC it scores as high on the Charpy scale as it does at 58 RC. The Charpy test is one way to measure impact resistance, or one form of toughness. Now, while I would make a big chopping knife out of O1, I would still keep it at around 58 because the Charpy scale is only one form of measuring toughness. But on a folder I try to hit 62-63 RC. That translates into better edge holding ability and is still just as tough. Hopefully Jeff can confirm that through his use. I believe his was at about 62-62.5 RC.

That is why I think it is very under-rated.
Click to expand...

That is some great info. Thank you for that. :thumbup:
 
JK O1

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Fiddleback O1

C9F85E5C-39FF-4197-89BB-1649916C9C95-44106-0000112CAF0F5FF0_zps854425b8.jpg
 
J. Oeser said:
I have wondered that too. I think that 1095 is just so cheap and easy to use for mass production that most manufacturers use it over O1. That just leaves custom makers to get O1 and a majority of people want some type of stainless on their customs. IMO, O1 is a very under-rated and underused steel.

Here is an interesting bit of info on O1. At 63 RC it scores as high on the Charpy scale as it does at 58 RC. The Charpy test is one way to measure impact resistance, or one form of toughness. Now, while I would make a big chopping knife out of O1, I would still keep it at around 58 because the Charpy scale is only one form of measuring toughness. But on a folder I try to hit 62-63 RC. That translates into better edge holding ability and is still just as tough. Hopefully Jeff can confirm that through his use. I believe his was at about 62-62.5 RC.

That is why I think it is very under-rated.
Click to expand...

Very cool. Thanks for the info. After reading that, I really wants to see more folders in O1.
 
I have been trying out a new supersteel and the more I do the more I have to gain even more respect for O1 tool steel.
 
J. Oeser said:
I have wondered that too. I think that 1095 is just so cheap and easy to use for mass production that most manufacturers use it over O1. That just leaves custom makers to get O1 and a majority of people want some type of stainless on their customs. IMO, O1 is a very under-rated and underused steel.

Here is an interesting bit of info on O1. At 63 RC it scores as high on the Charpy scale as it does at 58 RC. The Charpy test is one way to measure impact resistance, or one form of toughness. Now, while I would make a big chopping knife out of O1, I would still keep it at around 58 because the Charpy scale is only one form of measuring toughness. But on a folder I try to hit 62-63 RC. That translates into better edge holding ability and is still just as tough. Hopefully Jeff can confirm that through his use. I believe his was at about 62-62.5 RC.

That is why I think it is very under-rated.
Click to expand...

I have been putting it to great use lately. The other day an extension cord needed a new end and I used it to strip some wire. Had to cut a template for a cutout and the nicest surface I had to lay it on was a piece of plexi glass. Cut a few strips of templates while running the tip into a corner bead in the wall. Not only does this thing stay hair popping sharp for ever it's working edge is superb. I have yet to roll or chip it out. The more I use this guy the more I love it. While I dont use it exactly the same as my old 53 was used I would venture to guess that from my experience with Jareds O1 it will hold an edge easily 50% more then GEC's 1095. Now that I have the Hayn helper maybe a few side by side sheepsfoot tests are in order ;). Anyone know what they heat treat their O1 too?
 
I do not have anything in O1, but I just received an email from the fella who made my latest Sgian Dubh. I have extracted a quote which I think is relevant to the OP, Mods... If you disagree please feel free to remove this post.

Quote:
"The SF100 means 0.1% carbon like 01 carbon steel. It was cryogenically hardened to 59.6 Rockwell. I know it was used for the razor blade industry and is the last type of SF that was developed. It has stopped being produced now so you really have a bit of history there."

So Sheffield made O1 perhaps?
ImageUploadedByTapatalk 21374537332.924808.jpg
I borrowed the photo from his blog.

Paul
 
SF 100 is an out of production stainless in the class of 12C, or 13C sandvik.;


STEEL GRADE : SF.100
CARBON - 0.60% - 0.70%
SILICON - 0.50% MAX.
MANGANESE - 0.50% - 1.00%
CHROMIUM - 12.00% - 13.50%
SULPHUR - 0.025% MAX.
PHOSPHORUS - 0.03% MAX.
*note: info thanks to Culpepper on BB

It should take nice edges as it's used for scalpels and razors. Very nice Sgian Dubh !

Joe
 
Thats the first spear bullet end I like. The blade is not overly bulbous and looks sleek. Try as I may the patina just is not forming well on my Oeser. I think its mainly due to the fact that its the nicest knife I own, so I take a little better care of it. I usually wipe it down with my shirt after every use, something I dont do with my GEC knives. Over time I am sure I will lighten up on that but for now I like the used but doesnt really show it patina. Aside from all the sweat speckle showing up on the backsprings :rolleyes: :)
 
Good info and some great knives shown here. I just ordered some O1 stock for some knives I have planned to make. I can't wait to try it out. Picked up some great stag and jigged bone also, so with any luck I will make my fist slip joints soon.

Chris
 
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