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 AUS-8A???

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grindermcgee

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AUS-8A??? - Monday, April 05, 2010 5:54 AM ( #1 )
Love the steel and whatever CS does to heat treat it, but I have read this steel label as AUS-8, or 8A for short. What is AUS-8A? Is this a typo?

It reminds me of some of the older Japanese knives that were labeled "400 Series Stainless" which is very vague.

Any steel nuts out there know what I mean care to comment?
MattBlack

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Re:AUS-8A??? - Monday, April 05, 2010 7:11 AM ( #2 )
I thought AUS-8 and AUS-8A were different steels... I think 8A is the better one, but I could well be wrong.
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Ookami

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Re:AUS-8A??? - Monday, April 05, 2010 9:34 AM ( #3 )
The last "A" in "AUS-8A" obviously stands for "annealed".
(Source: http://zknives.com/knives/fixed/prod/cssrk.shtml)


Ookami
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MattBlack

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Re:AUS-8A??? - Monday, April 05, 2010 10:04 AM ( #4 )
Thanks for clearing that up ookami,

let me fix that broken link for you:

http://zknives.com/knives/fixed/prod/cssrk.shtml
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grindermcgee

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Re:AUS-8A??? - Monday, April 05, 2010 12:15 PM ( #5 )
Ookami


The last "A" in "AUS-8A" obviously stands for "annealed".
(Source: http://zknives.com/knives/fixed/prod/cssrk.shtml)


Ookami


Doesn't seem that obvious. So AUS stands for austentized?

So what is the difference between 8A Vs Aus-8A? Do you see where my confusion is coming from?
grindermcgee

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Re:AUS-8A??? - Monday, April 05, 2010 1:22 PM ( #6 )
I bookmarked the site. Thanks for the clip Scott.

So, AUS-8 is also called 8A, but AUS-8A is a softened version of the former for toughness sake(my conclusion only, I haven't read CS say it). That might explain why thinner knives like OSS are made from the AUS-8A.

This is why I leave the steel choice to the people who know what is what and the companies they work for.
Ookami

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Re:AUS-8A??? - Tuesday, April 06, 2010 12:19 AM ( #7 )
grindermcgee
That might explain why thinner knives like OSS are made from the AUS-8A.


No, it's not like that.

With the rolling of the steel to make it into bar stock, stress is induced in the steel. To relieve this stress, the steel is heated to a certain temperature and left to cool. This is called annealing.

This process makes the steel soft again and its structure homogenous. Among other things this will help prevent warping during the hardening process.

If this is hard to understand, imagine a guy who wants to get into shape. He comes from the office (also sometimes called mill) and is all stiff from working (or being worked) all day. So before training (hardening process) he has to warm-up in order to get his muscles ready.

So you can get your steel from Aichi either stressed (AUS-8) or already relaxed (AUS-8A).


Ookami
PS: I don't know if AUS stands for austenized, but it is possible.
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mike65

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Re:AUS-8A??? - Tuesday, April 06, 2010 6:00 AM ( #8 )
AUS-8 and 8A are the same steel their composition is 0.75% of carbon, 15% chromium, 0.50 manganese and 0.5nickel. Is a good all-around steel especially when properly heat treated( as CS do). The hardness is manteined around 56/57 HRC due the  little carbon content ( only steel with 1% carbon can achieve 60 without beig too brittle)
Cronx210

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Re:AUS-8A??? - Thursday, February 17, 2011 9:19 AM ( #9 )
 I see the new espadas are in the $200+ price range, andthey all use Aus 8, cold steel has become way overpriced, the designs are nice, but that aus-8 steel is actually cheaper then 440C, and when properly heat treated 440C outperforms aus-8, Seriously coldsteel,  at this point it is just the name that is selling, even the taiwan made SK-5 steel is cheaper then the Carbon V they used to use. But yet the price of the ghurka kukri sky rocketed in SK-5, why? because they removed the coating that protects it from rust and made it more fancy and shiny looking?!, i could have done that myself with epoxy remover...
fudo

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Re:AUS-8A??? - Thursday, February 17, 2011 5:40 PM ( #10 )
Cronx210


 I see the new espadas are in the $200+ price range, andthey all use Aus 8, cold steel has become way overpriced, the designs are nice, but that aus-8 steel is actually cheaper then 440C, and when properly heat treated 440C outperforms aus-8, Seriously coldsteel,  at this point it is just the name that is selling, even the taiwan made SK-5 steel is cheaper then the Carbon V they used to use. But yet the price of the ghurka kukri sky rocketed in SK-5, why? because they removed the coating that protects it from rust and made it more fancy and shiny looking?!, i could have done that myself with epoxy remover...


AUS8 is generically similar to 440B
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Cronx210

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Re:AUS-8A??? - Friday, February 18, 2011 5:37 PM ( #11 )
440B is a bad joke, and 440C was a knifemakers supersteel awhile ago, and still is for those who know proper heat treats, check out Entrek knives. Those knives, i wouldn't mind spending the full MSRP price on them after seeing youtube videos on what they're capable of. Especially since they come with a lifetime warranty, they're worth every penny.

Thank you for those links freakshow, i think those prices are reasonable, especially since other smaller folders can be slighter higher then $143, As for the SK-5 ghurka, yea i love mine to death, and was lucky enough to get the new satin finish one for the price of a coated one, only cause bladeshop made a screw up and were gonna face legal action by me. But the price for them now, just does not make sense to ME.
thesurvivaldemon

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Re:AUS-8A??? - Sunday, July 03, 2011 2:27 AM ( #12 )
Hello,
 
   I actually have recently bought several SOG knives which use the Aus 8 steel.  SOG has apparently perfected the use of Aus 8 steel, and have come up with several added processes that greatly improves their Aus 8 steel's wear resistanc eand edge holding capabilities, even better than it originally is.  SOG's Aus 8 steel is already perfected, but when they add the Cryogenic Heat Tempered process to it as well as the TiNitrate coating, these added processes make the already-awesome Aus 8 steel just about as high quality as 440C Stainless Steel and even makes it as good as (to some people) D2 steel too!
   My lates brand new knife, which is on its way to me right now, is the Cold Steel Trailmaster with the SK-5 steel.  So far I have heard nothing but awesome stories about SK-5 steel.  When my Trailmaster does get here, I plan to either Blue up the blade or add some other rust resistant coating to it.  I really want either the Trailmaster or Recon Scout that is made with the San Mai III Stainless Steel.  I heard that is awesome steel, even for stainless! I can't wait to get my Trailmaster, which will be here next week.  Then hopefully at around Xmas time I can get The Outback Bowie knife as my Xmas gift.  Going to be Awesome coming days for me and me knives collecting!
                                                                                                            
ToolMan

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Re:AUS-8A??? - Sunday, July 03, 2011 6:35 AM ( #13 )
^^^Cold Steel uses exactly the same three-step heat treating and cryo-treating process on AUS-8 as SOG does. SOG's TiNi coating, while it looks nice, does nothing to enhance the physical properties of the steel. I have a few SOG peices myself, and I can tell there is no difference between SOG's and Cold Steel's AUS-8 in terms of edge hold and sharpenability (yes, I just made that word up!). Why? Same steel, same heat treating process.

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Ookami

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Re:AUS-8A??? - Monday, July 04, 2011 1:53 AM ( #14 )
Yeah, both, CS and SOG, have their knives produced by several makers all over the world. As for the knives produced in Japan, they come from Seki city and a lot of the Seki makers have their heat treatment done by one company.


Ookami

PS: D2 is a great steel, it just sucks as a knife steel.
<message edited by Ookami on Monday, July 04, 2011 6:34 AM>
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Hezikiah

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Re:AUS-8A??? - Monday, July 04, 2011 7:35 AM ( #15 )
Cronx210


440B is a bad joke, and 440C was a knifemakers supersteel awhile ago, and still is for those who know proper heat treats, check out Entrek knives. Those knives, i wouldn't mind spending the full MSRP price on them after seeing youtube videos on what they're capable of. Especially since they come with a lifetime warranty, they're worth every penny.

Thank you for those links freakshow, i think those prices are reasonable, especially since other smaller folders can be slighter higher then $143, As for the SK-5 ghurka, yea i love mine to death, and was lucky enough to get the new satin finish one for the price of a coated one, only cause bladeshop made a screw up and were gonna face legal action by me. But the price for them now, just does not make sense to ME.



You should check your facts before trashing all 440B some guy named Randall makes some legendary god damned tough blades out of it. 

If you can find a 5.5" folding knife with G10 slabs and a Tri-Ad lock, in something better than Aus 8a steel, be sure to post that link friend-O. 

Entrek knives, are great knives, Ray Ennis is a good man. The only complaint I have from personal experience is a minor one, the handles are too small, oh and the sheaths are lousy. 
Krav Maga is our friend. 
Currently rocking a AUS8a SRK for Hikes around SoCal.   



jlauffer

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Re:AUS-8A??? - Monday, July 04, 2011 2:57 PM ( #16 )
Hezikiah


Cronx210


440B is a bad joke, and 440C was a knifemakers supersteel awhile ago, and still is for those who know proper heat treats, check out Entrek knives.


You should check your facts before trashing all 440B some guy named Randall makes some legendary god damned tough blades out of it. 


+1....how can 440B be a bad joke and 440C be a supersteel when they are so close to each other?  A tiny bit more carbon and manganese can't make that much difference.... 
 
 
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Re:AUS-8A??? - Monday, July 04, 2011 4:35 PM ( #17 )
^^^All you have to do is look who made the statement

Beware the fury of a patient man.
 
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Re:AUS-8A??? - Tuesday, July 05, 2011 11:46 AM ( #18 )
Freak Show Scott


Hezikiah

If you can find a 5.5" folding knife with G10 slabs and a Tri-Ad lock, in something better than Aus 8a steel, be sure to post that link friend-O. 

I am still hoping for the SMIII Voyagers that were planned for last year.  I hope that train of thought hasn't been abandoned altogether by Cold Steel.  But I will add that for many if not most real world applications there isn't a thing wrong with Aus8 IMHO.


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Re:AUS-8A??? - Saturday, January 05, 2013 5:20 PM ( #19 )
Ookami


Yeah, both, CS and SOG, have their knives produced by several makers all over the world. As for the knives produced in Japan, they come from Seki city and a lot of the Seki makers have their heat treatment done by one company.


Ookami 

PS: D2 is a great steel, it just sucks as a knife steel.

 what? why does benchmade use it for tons knives then?
spareparts

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Re:AUS-8A??? - Saturday, January 05, 2013 11:51 PM ( #20 )
^ Don't take is personally.  For every blade steel out there, some love it and some hate it.  I personally don't like AUS-8 for EDC.  I spend much more time sharpening it compared to S30V.  Then again, I find S30V to be much more chippy though.  So just depends on what you do with your knife and the demands you put on it.  D2 is great for me but a real pain to sharpen, so it doesn't get EDC'd and only used for specific tasks on certain occasions.
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GCG199

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Re:AUS-8A??? - Sunday, January 06, 2013 9:19 AM ( #21 )

The most important part of a steel is the heat-treating precess that it goes through. There are a few steels with a controversial history because of inconsistant heat treats.

I remember a lot of folks complaining about ATS-34 (the Japanese version of American 154CM) back in the late 1990s. It got so bad that Crucible listened and brought back their 154CM that was made with a cleaner process that fixed the quality control problems.

D2 also has an inconsistant record. Bob Dozier is supposed to be one of the best knifemakers for D2 bladed knives. 

Some of the Crucible CPM-process steels have a track record of chipping out too easily. It took several years for various knifemakers & knife-making companies to get it all sorted out. 

As far as AUS-8A is concerned, it is a good steel for most every day carry (EDC) tasks. If one needs more edge-holding or wear-resistance, then they need to look at another steel with a higher carbon, tungsteen or vanadium content.

It is quite simple to keep AUS-8A sharp via touch-up sharpening or stropping. It can be difficult to remove the wire edge from it though.
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fudo

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Re:AUS-8A??? - Monday, January 07, 2013 8:30 PM ( #22 )
thesurvivaldemon wrote I actually have recently bought several SOG knives which use the Aus 8 steel. +++++++++++++SOG has apparently perfected the use of Aus 8 steel, and have come up with several added processes that greatly improves their Aus 8 steel's wear resistanc eand edge holding capabilities, even better than it originally is. SOG's Aus 8 steel is already perfected, but when they add the Cryogenic Heat Tempered process to it as well as the TiNitrate coating, these added processes make the already-awesome Aus 8 steel just about as high quality as 440C Stainless Steel and even makes it as good as (to some people) D2 steel too!++++++++++++++ Mmmm, no. None of that is right. AUS-8 is a good small knife steel, but is not D2. For outdoors and working knives, carbon steels(of which SK-5 is one) are much tougher than stainless steels,whose primary virtue is that it stains less than carbon steels. Most of those processes you mentioned would be unnecessary if you started out with a better grade of steel. Aside from the steel used, the heat treat is the most important part of the knife My lates brand new knife, which is on its way to me right now, is the Cold Steel Trailmaster with the SK-5 steel. So far I have heard nothing but awesome stories about SK-5 steel. SK-5 is the generic equivalent of 1084. It is a good steel for outdoors and working knives, but there is nothing special or awesome about it.
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