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Crucible CPM S35VN

as knarfeng says anything can be toxic, remember the lady about 6 months back. died from water poisoning; contest on radio show. the goverment takes a 2 lb. rat & stuffs 15 lbs. of a new drug into rat & wonders why it dies
 
hardheart said:
I wonder why they don't use titanium, it forms carbides like crazy, or so I read in an old book.
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Well - I'm sure there's a good technical reason that a metallurgist might be able to explain, but just because titanium forms carbides doesn't mean it will work well in a steel alloy. I like soy sauce but wouldn't pour it over my chocolate mudcake.
 
so other than the mule team knife, why isn't the use of S35VN more widespread? it seems like a good replacement for S30V in the CRK knives and I've heard it's used in their fixed blades (or maybe it was their kitchen knives), why not in the Sebenza and Umnumzaan too? are any custom makers using S35VN for folders?
 
tf8s said:
so other than the mule team knife, why isn't the use of S35VN more widespread? it seems like a good replacement for S30V in the CRK knives and I've heard it's used in their fixed blades (or maybe it was their kitchen knives), why not in the Sebenza and Umnumzaan too? are any custom makers using S35VN for folders?
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My guess is that S35VN is a fairly new steel that's not completely ready to be placed on a flagship model like the Sebenza yet. Plus, it may be too similar to S30V to warrant a lineup-wide change. But who knows, maybe we'll see it become more widespread in months or years to come.
 
Kenix said:
My guess is that S35VN is a fairly new steel that's not completely ready to be placed on a flagship model like the Sebenza yet. Plus, it may be too similar to S30V to warrant a lineup-wide change. But who knows, maybe we'll see it become more widespread in months or years to come.
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i heard that CRK is going to use CPM S35VN. it is a ways but it is in the works. and spyderco is releasing a mule in it next week. sounds like an interesting steel.
 
Given all the events at Crucible(bankruptcy, buyouts) I guess they don't know themselves.
 
No it isn't being discontinued. In fact it is supposed to be displayed at the SHOT show. NSM has some that should be in their line up for distribution soon. I doubt with NSM and Crucible continuing that this steel would be discontinued, especially with the push from Reeves to develop it. We just have to be patient as everything becomes readjusted followng the changes resulting from the financial problems Crucible faced.

From the composition and what another maker I know has said about it, it seems to be a good improvement over s30v; more chip resistant, easier to finish, slightly tougher. I would guess that it will start making its way into production for some companies shortly, pending price of course. Spyderco did realease a version of their mule team with it just recently.
 
knarfeng said:
You can't be too safe. Better send all those toxic blades to me. That would include all your steel blades. Wouldn't want you to get iron poisoning.
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No, I think that this would be too high a concentration. Send half of them to me. :D

You think the way I do on this, knarfeng
 
I've been playing with my Mule S35VN for the past 3 days and I'm surprised by how good the corrosion resistance of S35VN is. I could not get it to rust in my little fog chamber. It sharpens to a very fine edge quickly. Chip resistant. Decent edge holding at 59 rc, should be world class edge holding at a higher hardness though.

Having 3% vanadium and less carbon than S30V, it is probably the "stainless 3V" that Crucible originally wanted to make. With only 0.5% niobium, I don't think it has many niobium carbides, it's probably added for grain refinement and toughness. After I finish playing around with this knife, I'm going to reharden it to 62-64 rc to see what the steel is capable of.

I think Sal should make Mules out of another Niobium steel called Niolox =) Niobium is good stuff.
 
Keep us posted on what you find after rehardening. I have some of this stuff but have not got around to HT a blade or testing it yet. I was thinking of making a folder with it after I've tested a blade or two so I'm definitely interested in your findings. The best thing about it thus far that I've noticed is that it grinds well. Also the HT schedule is exactly the same as S30V. At least that was the word I got from Crucible. NSM should be offering some in Feb I believe.
 
Murdok72605 said:
Keep us posted on what you find after rehardening. I have some of this stuff but have not got around to HT a blade or testing it yet. I was thinking of making a folder with it after I've tested a blade or two so I'm definitely interested in your findings. The best thing about it thus far that I've noticed is that it grinds well. Also the HT schedule is exactly the same as S30V. At least that was the word I got from Crucible. NSM should be offering some in Feb I believe.
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It grinds easier than S30V? That's good news, must be the finer carbide structure then. Compositionally it looks very similar to S30V so I suppose it would heat treat the same, but the hardness might end up slightly higher since S35VN has some cobalt, nickel, and tungsten.

Sure I'll post my findings of the rehardened S35VN. I expect similar edge retention to S30V at the same hardness though.
 
I have made a couple dozen blades from it, and I like it. Hard to tell much difference from S30V, but it takes a higher finish, which in my experience means it will be easier to sharpen but not quite as wear resistant. Supposed to be about 1/2 way in between CPM154CM and S30V, so it is a nice choice for a steel that finishes pretty well and cuts well.
 
Thanks to RJ and cotdt,

RJ, How hard are you making it? And what do you think about the 59RC of Spyderco?

cotdt, Yes, please share your findings with the higher hardness.
 
If it has less wear resistance than S30V them I'm disappointed. Although, let's see, may be that 0.5% Nb can do some magic...
 
From CRK Knives..

"We leave tomorrow for the Shot Show and thought you might like a look at the new knife we will be showing. It is called Nyala - named for a handsome antelope that is prevalent in the area where Chris grew up.

S35VN blade, brown canvas micarta handle, it has a 3.7 inch blade, 8.5 overall, it is a great utility and skinner. We just have a couple of prototypes now but will be in production in the next few months. Retail will be about $230.00.

Enjoy
Anne
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2010shotshow-01202010-74.jpg
 
Nice design! That's the type of knife I'd love to have around 64-66HRC depending on the steel...
 
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