Odd experience. Hardness/toughness of S30v Manix XL blade?

Joined
Apr 14, 2014
Messages
9
Ok, so this is odd, or it seems so to me. So recently while sitting on my couch, playing (yeah that mechanism is addicting) with my new knife while watching TV I must have gotten distracted. I'm a smoker, and had a simple blue glass ashtray at my feet. Forgetting the closed knife in my lap at some point in the evening, it fell from said lap onto said ashtray. My first thought was about broken glass next to my bare feet, right? Well yes, but instead of broken glass it appeared that nothing happened. Relieved, the knife is picked up and placed in my pocket. Being that this knife is irresistibly fun to play with, it comes out again shortly.

Now here is the interesting bit. The spine of the blade has a small dent! Yes, I wrote dent, and I meant it. Not large, but noticeable. Maybe 3/32" long and just shy of 1/32" deep, right on the corner. You can feel it by touch. Cosmetics aren't something that overly concern me, since this is a work knife after all and the blade already is scratched from work. Sharpening is also a hobby of mine (one that is happily shared by many here), and it is no mystery to me how to make that tiny little dent go away. However, the thought crosses my mind, "Is that supposed to happen like that?" In most every other experience with glass/steel interactions, the steel has won and the glass lost. After closely inspecting the glass, it turns out that there was in fact a minuscule chip. By that, you can just barely feel it with a thumb nail, but after running my nail over it a few times, that has smoothed out to be barely imperceptible.

So now the question: Has anyone had a similar experience to this? Since childhood a knife has always been in my pocket or on my belt; EDC blades have always been a part of daily life. Sure, glass may have a surface hardness higher than steel, but not stronger than steel! Was this one of those things where this just happens to everyone else and it took until my mid-thirties before it happened to me? Did a fluke blade with a bad heat treat sneak it's way from the factory and into my shopping cart? Do I have in my possession a new and amazing form of glass that should be researched for its amazing properties? Did the gods of Physics just decide to show me a neat trick that night? "Yo Amir... you'll never be able to reproduce it, but check THIS out! One in a million!" :friendly_wink:
 
Last edited:
Glass is very hard, harder than your knife steel. It is not very tough, however, and so it breaks easily. It will dent steel. In fact, you can easily sharpen your much softer (relatively speaking) knife blade on the glass.
 
Guess it was just the one in a million interactions with low enough energy no to smash the glass, but just enough to damage the steel. It's a crazy world we live in!
 
I dropped a thin glass (UK) milk bottle onto my dog's bowl once - which was inch thick heavy ceramic. Bottle absolutely fine and dog bowl smashed to smithereens!
 
Speaking as a guy who works in a lab and is surrounded by glassware, I can never predict what is going to break next and how.
Glass is very odd stuff!
 
If it was a thick ashtray then I am not surprised. Thickness will have a lot to do with it. Try breaking a glass door knob. As a kid we found one and tried throwing it at the asphalt to break it and couldn't and it took quite a few shots with a 22 to finally finish it off. :)
 
I've actually repaired a scandi 3v knife on a glass table top. The knife had a very acute tip which got bent. I lightly pushed the tip on the glass until it was flat with the rest of the scandi bevel. Worked great. Steel and glass are mundane these days but they really are fantastic materials.
 
Wow... So I just bought my first Spyderco (PM2)... being unfamiliar with the operation of the blade, I was a bit clumsy... Cut myself twice, and dropped it once! (not because of the cuts😝) Anyway, picked up the knife, and found a very small dent on the spine of the blade! First thoughts, I bought a fake! After reading this and thinking about it, it makes perfect sense... The floor is old ceramic/brick tile...
 
Back
Top