Guesstimating Blur Steel without knowing the date stamp?

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Nov 17, 2008
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Hello,

I kind of miss my Blur, and I see some good prices on Blurs popping up lately on the fleabay, but I can't always rely on the item descriptions to tell me what steel the knife's blade is made of. That's pretty understandable, since a lot of sellers a) just use a stock image, and b) probably just copy-and-paste their information from the manufacturer's website, so they'd reflect whatever steel the Blurs are currently made of, not necessarily what steel that particular knife was made of.

I know that there have been many different steels used on the Kershaw Blur over the years - 440A, 13c26, 14c28n, 420HC, S30V, CPM154, etc. I know that one can check the 'born-on' date stamp on the blade of a standard production Blur and use that to determine whether Kershaw was using 440A, 13c26, or 14c28n at the time that particular knife was made.

What I'm wondering, though, is whether the knife's appearance can be used to judge what steel the blade is made from. As with steel, it looks like the blur has undergone a few cosmetic changes over the years - at some point, they switched the sandpaper-style inserts to rubberized ones, and the blade grind seems to have changed from a pretty high flat-grind to what looks like a hollow-grind.

Assuming I can't discern / find out what date is stamped on the blade:

Would it be safe to say that this one is made from either 13c26 or 14c28? It seems as though the knives with the steeper, hollow-looking grind are what Kershaw is currently producing, although I'm not sure.

blurs.jpg


...while this one (which kind of seems to be the older style blade shape?) is more likely made from 440a? Is it possible that a Blur of this blade shape / handle design was made with 13c26, or are they all 440a blades?

2chnxao.jpg


My google-fu / the mystical search engine has yeilded nothing in this regard.
 
Last edited:
Found this... http://www.bladeforums.com/forums/showthread.php/487060-13C26-Changeover-Born-On-Dates

In summary:
- 440A - made before July 2007, no date stamp
- 13C26 - made starting July 2007, has date stamp
- 14C28N - ???, first mention I can find seems to be around Sept. 2008, but I don't know if that was select knives only or everything

Thank you, but that's not at all what I was asking. :confused:

Like I said, I already know that one can check the 'born-on' date stamp on the blade of a standard production Blur and use that to determine whether Kershaw was using 440A, 13c26, or 14c28n at the time that particular knife was made.

What I'm trying to find out is whether you infer what blade steel the knife uses without knowing the 'born-on' date, juding by its appearance alone.
 
My mistake. I misunderstood. I thought you were asking if there was a way to identify the blade steel if there was no date stamp. From what I could find, un-dated blades would be either 440A or 14C28N (the 13C26 ones seem to have a date stamp). As for whether or not there is a visual distinction between the 440A and 14C28N ones, I have no idea.
 
Since this seems like a stumper I got an idea, how about placing it on a precision weight scale and comparing results with a known Blur. The 14c28n should be heavier because of the extra goodies! I kid, I kid! :D
 
Any unmarked blades today unless somebody has had them sitting around a LONG time you can probably imagine as 14c28n unless of course they are marked with S30V or CPM-154.
 
Any unmarked blades today unless somebody has had them sitting around a LONG time you can probably imagine as 14c28n unless of course they are marked with S30V or CPM-154.

I agree with the added assumption that the older ones should have skate tape inserts rather than the trac-tek also
 
Hmmm...this one does seem to be kind of difficult to put a finger on. :confused:

So far: if it's got grip-tape type inserts, it's probably safe to assume that it's 440a?

Is it safe to assume that knives with the trac-tec inserts have some kind of Sandvik steel? Anyone know if the switch in steel coincided with the change in handle material?
 
Kershaw went to a softer, kinder-to-the-pocket Trac Tek insert in late 2007, early 2008 I believe. The older blade shape with a lesser pronounced recurve was 440A.

Pretty sure of this, but I could be off a bit...
 
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