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S7 VS SR77
#47937
04/26/07 03:42 PM
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Joined: Feb 2007
Posts: 522
bigocean
OP
Scrapper
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OP
Scrapper
Joined: Feb 2007
Posts: 522 |
No not really... <img src="/ubbthreads/images/graemlins/loopy.gif" alt="" />
But all recent reading of what INFI is based has got me thinking. Is SR77's chemical make-up different to S7 or just it's molecular structure different from SYK's proprietary heat treat? In other words, is SR77 just S7 with SYK's special heat treat protocol and a different name for marketing/whatever purposes? <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />
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Re: S7 VS SR77
[Re: bigocean]
#47938
04/26/07 03:47 PM
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Joined: Mar 2007
Posts: 234
Arkie
Mutt
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Mutt
Joined: Mar 2007
Posts: 234 |
If I'm not mistaken, somewhere on the main website states as much.
I'm too drunk to taste this chicken
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Re: S7 VS SR77
[Re: bigocean]
#47939
04/26/07 04:13 PM
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Joined: Sep 2006
Posts: 278
thombrogan
Mongrel
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Mongrel
Joined: Sep 2006
Posts: 278 |
is SR77 just S7 with SYK's special heat treat protocol and a different name for marketing/whatever purposes? Ya, d00d! It's purposeful marketing. SR-77 is heat-treated to behave like a magnified version of S7 (before Dan and Patti got to it, only AngelSword was doing such things with S7), so the different name lets you know it's not just heated/quenched/tempered. That said, 'plain old S7' is simply amazing and making it even better is, well, even better!
"I knew you before you knew you had hands" ~Tracey Brogan
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Re: S7 VS SR77
[Re: thombrogan]
#47940
04/27/07 02:50 AM
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Joined: Oct 2006
Posts: 116
Ron Athay
Mutt
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Mutt
Joined: Oct 2006
Posts: 116 |
Rumor time. I think I remember reading early on that SR77 (like INFI and SR101) has added Nitrogen and Cobalt to improve sharpening/edge properties. Maybe someone who knows more than me can comment. Ron Athay
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Re: S7 VS SR77
[Re: Ron Athay]
#47941
04/27/07 12:08 PM
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Joined: Sep 2006
Posts: 278
thombrogan
Mongrel
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Mongrel
Joined: Sep 2006
Posts: 278 |
That's a cool sounding rumor! I had only heard that the a rigorous heat-treatment protocol was given to S7 to make it 'SR-77.'
"I knew you before you knew you had hands" ~Tracey Brogan
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Re: S7 VS SR77
[Re: thombrogan]
#47942
04/28/07 05:19 PM
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Joined: Feb 2007
Posts: 14,586
Horn Dog
Junk Yard Dog
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Junk Yard Dog
Joined: Feb 2007
Posts: 14,586 |
I don't know how Dan makes SR77, but I am glad he does. Up until recently, my favorite steel for big knives has been 1095. Sometimes it breaks, but it is easy to sharpen and holds a good edge. Today I saw a dead old hardened oak limb had blown down. It has been dry, warm, and windy here. I decided to cut up the limb with my Ontario camp machete rather than get out the chain saw. The limb wasn't that big. Just a few chops and my hand was stinging. This oak is like a rock. Its the kind of wood that you would rather saw than chop. I got out the Dog Father. The heavy blade and Res C handle made chopping much easier, but still hard. When I finished, I felt the edge and it needed a touch up. Just a few strokes with a steel and it was sharp as ever. I love this SR77 steel.
Horned, dangerous, and off my medication.
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Re: S7 VS SR77
[Re: Horn Dog]
#47943
04/28/07 05:29 PM
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Joined: Sep 2006
Posts: 88
HorizonSon
Pooch
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Pooch
Joined: Sep 2006
Posts: 88 |
From my limited understanding:
SR-101 = 52-100 series ball-bearing steel
SR-77 - S7 series high-impact tool steel
IIRC... <img src="/ubbthreads/images/graemlins/smirk.gif" alt="" />
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Re: S7 VS SR77
[Re: HorizonSon]
#47944
04/29/07 11:40 AM
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Joined: Sep 2006
Posts: 1,743
Leatherface
Junk Yard Dog
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Junk Yard Dog
Joined: Sep 2006
Posts: 1,743 |
Horizon, That is pretty much the way I heard it as well!!
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Re: S7 VS SR77
[Re: Leatherface]
#47945
04/29/07 12:12 PM
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Joined: Feb 2007
Posts: 14,586
Horn Dog
Junk Yard Dog
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Junk Yard Dog
Joined: Feb 2007
Posts: 14,586 |
The intro in the Scrap Yard Knife site says that Dan really liked the shock taking qualities of S-7. I think S-7 is the basis for SR-77. Dan's 40 hour heat treatment transforms the S-7 into SR-77. At least that is what I get from their own web site. All I know for sure is it is tough. I have pounded the Dog Father and the S6 through knotted, dry, hard liveoak with no damage or failures. I destroyed the edge on a Condor 420HC doing much less. And 420HC is not all that bad a steel for most uses.
Horned, dangerous, and off my medication.
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Re: S7 VS SR77
[Re: Horn Dog]
#47946
04/30/07 02:32 AM
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Joined: Sep 2006
Posts: 7,208
Andy Wayne
Junk Yard Dog
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Junk Yard Dog
Joined: Sep 2006
Posts: 7,208 |
S7 is what jackhammer bits are made out of. <img src="/ubbthreads/images/graemlins/eek.gif" alt="" /> And that’s “regular” S7, not SR77. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" /> That’s why they’re so tough and have no problems with concrete blocks. You could probably chop up your sidewalk if you wanted. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />
JYD #4
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Re: S7 VS SR77
[Re: Andy Wayne]
#47947
04/30/07 04:32 AM
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Joined: Feb 2007
Posts: 15,879
ColdOne
Junk Yard Dog
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Junk Yard Dog
Joined: Feb 2007
Posts: 15,879 |
SR77 - The stuff you can use to chop up jackhammer bits! <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />
JYD#10 Blade '08 - I challenge coined Dan Busse and WON! Blade '10 - The score is now 2-0!
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Re: S7 VS SR77
[Re: ColdOne]
#47948
04/30/07 10:39 AM
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Joined: Sep 2006
Posts: 278
thombrogan
Mongrel
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Mongrel
Joined: Sep 2006
Posts: 278 |
I would, but people will talk.
"I knew you before you knew you had hands" ~Tracey Brogan
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