UHC - Ultra High Carbon steel sprint run

[Stuman]

HI Guys,

Just seen some beutaful Sandvik Ultra High Carbon Steel, finnish made - knives and it got me thinking, wouldn’t it be great if Spyderco done a sprint run with this steel. I don’t belive in my humble short few years of collecting Spyderco’s I’ve seen any UHC steel knives. I was quite blown away when I saw one of the makers start carving on a piece of steel with no edge deformation or chipping and it still cut paper like it didn’t even know it was chewing on steel a few seconds ago and it was only after doing a little more research that I saw it was easily capable of attaining a Rockwell Of 64 to 66 HRC no less.

What do you guys think ? has Spyderco done a UHC knife before ? if not should they ? Because I’m unaware that they have, so I’m asking if any of you guys know of a model in UHC steel ?

[ZrowsN1s]

What is ultra high? Sandvik 12c27 has something like 0.6% and ZDP-189 has something like 3.0%

[Art_vandeley]

IIRC UHC is a steel from Heimo Roselli in Finland. He uses that steel on some of his knives.

[Stuman]

What is ultra high? Sandvik 12c27 has something like 0.6% and ZDP-189 has something like 3.0%

UHC Steel has 1.50% to 2.00 % carbon so just for comparison 1080 has 0.75% to 0.88% carbon in it so that is a load of carbon in the UHC steel and it’s a fantastic steel apparently and I think it would make a fantastic knife like a spydie puukko folder or some thing or even a full blade.

[bearfacedkiller]

Are we talking about Roselli? They are like basic carbon steel knives but with very high carbon and run in the mid to high 60s. I have looked at them for quite a while but haven't actually had a chance to play with one yet.

[Canazes9]

I wish someone would post a link or full composition specs!

David

[Stuart Ackerman]

Me too...

[Bloke]

I have a Roselli Bear Claw in UHC and as I understand it UHC steel is Roselli's own brew and understandably he's pretty tight lipped about it.

The little Bear Claw is a very small Scandi Grind knife which I bought to whittle with a few years back. Unfortunately I dropped it on the kitchen tiles not long after I bought it and chipped it rather badly.

All I can say with certainty is it is extremely hard and with Eze-Lap diamonds it was an absolute nightmare to repair.

I take all Scandi Grinds to zero and after my experience in repairing the little Bear Claw I personally don't think it's best suited to a Scandi but I'd jump at the chance to try UHC in a FFG.

I'm a fan of Roselli's and have about half a dozen of his (Krupp W75 ... hope I don't have my wires crossed) carbon steel knives and his Hunter is arguably my favourite BushCraft knife.

[Robishere]

Any time these zdp 189 or Elmax and uhc steels want to get into a cutting contest with my Spyderco Maxamet...let me know... my Maxamet sharpens as easily as s30v but cuts and cuts until it is just silly. 4 strokes on the sharpmaker and it sinks into anything with gravity pressure.

[TomAiello]

I'm with you on the Maxamet, but I'd never heard of the Roselli UHC until now. It sounds really interesting. I might have to try to find one so I can try it out.

[Doc Dan]

http://zknives.com/knives/steels/steelg ... hrn=1&gm=0

How does Roselli get 2% carbon in that steel without anything else?

[Bill1170]

Is this UHC an ingot, or a PM steel? Seems like a simple steel at 2% carbon would segregate while freezing into the ingot.

[Nate]

Old thread with some discussion of UHC steel:

//forum.spyderco.com/viewtopic.php?t=65926

[Stuman]

Are we talking about Roselli? They are like basic carbon steel knives but with very high carbon and run in the mid to high 60s. I have looked at them for quite a while but haven't actually had a chance to play with one yet.

Yes your totally correct and for just a carbon steel to reach the mid 60s it’s an amazing feat this is why I’d love to see a Spyderco in UHC steel

[Stuman]

I wish someone would post a link or full composition specs!

David

Here is the link to site of the UHC knives: https://scandinavianoutdoor.com/roselli ... -40-years/

[Stuman]

Is this UHC an ingot, or a PM steel? Seems like a simple steel at 2% carbon would segregate while freezing into the ingot.

BILL1170 UHC steel is a ingot steel

[Bill1170]

Is this UHC an ingot, or a PM steel? Seems like a simple steel at 2% carbon would segregate while freezing into the ingot.

BILL1170 UHC steel is a ingot steel

Thank you. Until someone shares the elemental makeup, I’ll conclude that it is not a simple steel, but contains top secret carbide formers along with the iron and carbon.

[Ankerson]

HI Guys,

Just seen some beutaful Sandvik Ultra High Carbon Steel, finnish made - knives and it got me thinking, wouldn’t it be great if Spyderco done a sprint run with this steel. I don’t belive in my humble short few years of collecting Spyderco’s I’ve seen any UHC steel knives. I was quite blown away when I saw one of the makers start carving on a piece of steel with no edge deformation or chipping and it still cut paper like it didn’t even know it was chewing on steel a few seconds ago and it was only after doing a little more research that I saw it was easily capable of attaining a Rockwell Of 64 to 66 HRC no less.

What do you guys think ? has Spyderco done a UHC knife before ? if not should they ? Because I’m unaware that they have, so I’m asking if any of you guys know of a model in UHC steel ?

That's marketing, it's really nothing new, this stuff has been around for awhile now and it's not really all that interesting really. The high hardness carbon steels really don't do anything more than the lower hardness steels will as far as edge retention goes. UHC is nothing more than a marketing buzz word. As far as edge retention goes it really doesn't matter much if it UHC or HC steel they performance basically the same in the testing I have done. There is no magic, UHC and HC steels at the same HRC will perform basically the same, close enough nobody would even be able to tell any difference. People would be better off with steels like 52100 or A2 in the long run.

There would be much more difference changing the edge geometry, edge finish and or blade geometry than there ever would be between those steels.

ANY high hardness steel will cut a lower hardness steel with no problems.

66 HRC cutting 30 HRC steel is easy.

[Ankerson]

http://zknives.com/knives/steels/steelg ... hrn=1&gm=0

How does Roselli get 2% carbon in that steel without anything else?

He can't, that is the bottom line, it's impossible.

A simple carbon steel with 2% carbon would be extremely brittle with out other elements for the carbon to combine with. and the other elements would have to be at a high enough percentage that it would make a difference.

But then we wouldn't be talking about a simple steel here anymore.

[TomAiello]

Wouldn't ZDP-189 kind of be the ultimate expression of "ultra high carbon" steel?

And what about the White that Murray Carter uses? Isn't that the same general idea, except that it's clad with stainless?