Here’s a Weird One...

J

John_0917

Joined
Apr 15, 2014
Messages
3,384
I frequently use/used this Kershaw CQC11k as a filet knife to trim raw chicken and beef...after trimming some chicken tonight I went to clean it, got the kitchen sink water hot (not crazy hot, but steam producing), dipped it into the stream and BANG!

49BA30A5-644D-4999-9D5E-A336CA5553E6.jpeg

I look at it confused and see this massive crack in the blade...what in the world?

Has anyone ever had this happen? Mind you the water was not that hot, and the knife was no colder than it would get cutting refrigerated meat.

Needless to say I’ll be sending this one on to Kershaw but want to see what insight we have on here. By the way, the rust is just surface and hasn’t been there long, I clean it off every so often but it’s not pitted just red surface rust 8cr is prone to.
 
Wow!!!

Never seen a break like that.
Even if the water was boiling I can’t see that happening.
Most likely a bad piece of steel.
 
Very curious , unless you were also prying at the time ? Never seen this, even in very cheap kitchen knives from just thermal stress of normal use .
 
Just a guess. Something had to be very wrong with the blade. It was likely on the verge of snapping and the stress of the tempurate made it fail.
 
John_0917 said:
I frequently use/used this Kershaw CQC11k as a filet knife to trim raw chicken and beef...after trimming some chicken tonight I went to clean it, got the kitchen sink water hot (not crazy hot, but steam producing), dipped it into the stream and BANG!

View attachment 814046

I look at it confused and see this massive crack in the blade...what in the world?

Has anyone ever had this happen? Mind you the water was not that hot, and the knife was no colder than it would get cutting refrigerated meat.

Needless to say I’ll be sending this one on to Kershaw but want to see what insight we have on here. By the way, the rust is just surface and hasn’t been there long, I clean it off every so often but it’s not pitted just red surface rust 8cr is prone to.
Click to expand...
And in the category of most weird, tonight's winner is...!
 
Agreed, that's a funky break. From what I understand, steel can break pretty easy and in funky ways if the steel itself isn't clean or alloyed properly, and for sure if the heat treat was bad.

That's super interesting though, I wish we had access to some fancy metallurgical lab stuff/ know how to use said equipment
 
I will say I have seen some surprising thermal breaks ones I never expected and most likely what happened here but likely the odd ones are due to an invisible weakness in the steel in the first place.
 
I've seen that happen. On a junk kithen knife in the dish washer. Blade snapped clean off at the handle. Defective steel, can react funny to heat changes. Kershaw's warranty should take care of you.
 
Definitely not treated correctly. Any steel, even the crap Chinese ones should not do this from this kind of use.
First time I've seen this too.
BTW, still usable in a survival situation.
 
halden.doerge said:
Wow, that is one impressive break! Gotta love that 8Cr13Mov!
Click to expand...
Essentially AUS8 . Lots of good knives around with this steel that just work fine . This might be a tempering problem but no way it's the steel formula . Unless you're just making a snide steel snob funny ?
 
DocJD said:
Essentially AUS8 . Lots of good knives around with this steel that just work fine . This might be a tempering problem but no way it's the steel formula . Unless you're just making a snide steel snob funny ?
Click to expand...

AUS8 is better.
 
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