Can you tell by the spark?

sweet

sweet

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Nov 11, 1999
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Can you tell by the spark what it is?

sparkk.jpg
 
uhhhhhhhhh steel?

probably has some carbon in it judging by how the sparks branch.

Fastenall does real analysis if you have access to a lot of this steel

-Page
 
It's certainly not mild steel or cast iron. :D The spark test can give a general idea of the composition but that is all.
 
It looks like the sparks are exploding. I've read that means that its some pretty high carbon alloy. Its not stainless. The sparks would me more white from the Mg added.
 
I wonder if someone could compile a spark library with pictures of all the different steels sparked out.
 
This is it, I think he said it was O-3? I just have never seen O-3 or heard of it as I have only played with W-2, 1050, 75/80, 95, 5160 and a few others but nothing I have is O-series

thestuff.jpg


The next photo is Grade 4 Titanium some of those sparks pop, you can see one popping above my name

spark1.jpg


and this is 1050

spark3.jpg
 
These are excellent pictures ,Don I was taking a guess using my book I knew it was high carbon and darn near said 01 and 03 but ive never heard of anyone ever using 03 so I looked on the carbon table to see what one had higher carbon content. I just started grinding 1085 and I dont like it even polishing with 500 grit it sparks. Plus I get 5 times more shocks even with one shoe off. I for the most part do stock removal on cpm 154 or 154cm . I did buy a few pieces of ats34 but never tried it. I do know this I can grind a hardened blade of 1085 10 times easier than a anealed piece of 154. The cpm154 hardly sparks.
 
The more chromium, the less sparky a steel is. That's why stainless doesn't spark much.

W2 will spark more like the 1050 photo, actually it's hard to tell the difference from any of the 10XX and W1, W2.

Add a little chromium, .50% like 01 has and you get less sparky. 5% Cr like D2 and much less sparky.

Heat treated steel is much more sparky than same steel annealed.

Cool photos...
 
Don Hanson III said:
The more chromium, the less sparky a steel is. That's why stainless doesn't spark much.

W2 will spark more like the 1050 photo, actually it's hard to tell the difference from any of the 10XX and W1, W2.

Add a little chromium, .50% like 01 has and you get less sparky. 5% Cr like D2 and much less sparky.

Heat treated steel is much more sparky than same steel annealed.

Cool photos...
Click to expand...

11.5% Cr in D2 Don , you had me wondering there , had to look it up . 5% in A-2
 
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