A8 tool steel ????

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Sep 3, 2004
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I have the chance to get a couple of knife size pieces(for free) and I don't know much about this steel. I know there are a couple guys who make integrals with it but other than that I don't know anything. How does it hold an edge, How stain resistant is it and how does it compare to A2.


I tried a search but didn,t find the stuff I was looking for.



Thanks a bunch
jimi
 
J.Wade said:
How stain resistant is it and how does it compare to A2.

How stain resistant is A2? Dont mean to hijack but I have been wondering this for a while now. I am used to 0-1 so Ihave been looking for something less rust and stain friendly without going to D-2.
 
Brian, A2 will rust like O-1. If you want stain resistance in a tool steel, you have to go with D2.
Scott
 
boy fitzo i like the way that page spells it all out for you
im still in ght dark mostly about ttt charts but i think i can see the light
only thing is im still at a hell of a slow walk
does the site have many other types with info like that
thanks
butch
 
There's a boatload of that type of spec sheet there, Butch. Actually, many manufacturers offer pretty much the same type of array of info on their products. "crucibleservice.com" is loaded, for one. Check it out, you can spend days reading spec sheets.

The amount of information available to us is staggering if we take the time to seek it out. The internet has changed everything. For instance, on this one I typed "A8 tool steel" into Google and that was the fourth or fifth link.

Butch, whatever your chosen steels are, visit a couple of the manufacturers and copy out either the links or the data sheets. Learning about steels you don't use still has value because it teaches you what the various alloying elements do to not only the steel characteristics but how they affect heat treat. I keep printouts right in the front of my HT notebook.

How fast we learn is not as important as that we keep learning, IMO. He who wants to learn only enough to get by will fall by the wayside eventually as people learn his self-imposed limitations. It's one thing for a new maker not to know this stuff yet, but another for someone with 5 years to display a lack of desire to have learned. People notice that.
 
i have been to cruciblei just must not have looked in the right places i think i might have a crush on the 3v
i ll have to give them a call when i put in my next order (next week i think)
ooo and i do print out many pages i never know when ther might not be online
thanks and sorry for sorta hijacking
butch
 
From the information given in the link, A8 looks like it will make a decent knife blade. It looks like a cross between A2 and O1, but with less carbon, or O1 with less carbon and more chromium. It should be a pretty tough steel with a fine grain and good edge holding - vanadium and tungsten content. These 2 elements will also make it more difficult to forge - "red-hard" but not significantly more difficult than forging 52100 or O1 steels. That based on some academic extrapolation on my part... have never worked with this steel before.

The stainlessness issue is an often asked question. I've been told that steels like L6 (nickel content) and A2 (some chromium) will make the steel more stain resistant than O1, 1095 etc. but thats never proven correct in practise for me. The steel achieves stain resistance "suddenly" as the chromium content reaches the magical 12% mark, as in D2. D2 will still stain with some types of materials (I find it with meats and blood) however. Jason.
 
WOW !!! Ask and you shall receive


thanks a bunch guys. That link is great. thanks Fitzo


I'll be grabbing the steel tomorrow. pics by monday (hahaha) I wish

cya
jimi
 
thanks for the stain dissusion guys.
 
We make cutters for a multi station LARGE wood carving machine. We have tried A2 - 01 and a few others I don't remember and have now settled on A8 for quite a number of years. My customer said it stands up better than any thing else we have tried. His machines cut mostly curley hard maple so as you see the cutters get a good workout. I would guess it would make a tough knife.
Good luck
 
Just my opinion, but I sure wouldn't be trying to forge this stuff. Looks to be a pretty good blade steel though.
 
Jason Cutter said:
D2 will still stain with some types of materials (I find it with meats and blood) however. Jason.
I've worked exclusively with D2 blades in the field for two years and I've never had a problem with D2 staining if you clean up properly. I'm up to my elbows in blood and guts every fall. Nine gut piles to prove it. :D
Scott
 
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