Carbon Sato Construction - Wrist Twisters
 
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post #1 of 8 Old 09-02-2007, 10:55 AM Thread Starter
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Carbon Sato Construction

My Carbon Satos are a little worse for the wear. The rivets on the front portion are quite loose and a few are missing. I think it is becasue they hang so far back from the band mount. I will be re-riveting them, but I have gotten a bug to relocate them. I am quite an experienced fabricator and welder, but I am at a loss. Do any of you know what the tubing on the carbon Satos is made out of. I know the front and rear end caps are stainless, but the tubing looks to be titanium. If it is that throws a bit of a loop in my design. If it is stainless I can weld it all day long. Titanium either requires a vacuum chamber or to purge it with Argon on both sides. Anyone? Bueller?

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post #2 of 8 Old 09-02-2007, 05:15 PM
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My best guess... Stainless
Pretty sure it's not Ti

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post #3 of 8 Old 09-02-2007, 05:28 PM
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Is there a way you can test it?

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post #4 of 8 Old 09-02-2007, 05:30 PM Thread Starter
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I think it is stainless also, but was just curious if anyone knew for sure. It isn't welded to the end cap, so it is hard to tell. There is no way that I know to test which one it is. Neither one is ferrous as far as I know.

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post #5 of 8 Old 09-03-2007, 09:38 AM
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Metallurgy

If by "not ferrous" you mean "magnets won't stick to it", the material is probably 400 series stainless (which is ferrous in that it is iron based), which is generally non magnetic, but quite weldable. It seems to me that if any component of the muffler is TI, Sato would crow about it extensively just to emphasize the trick factor. As you undoubtedly know, even when TIG (GTAW) welding stainless, a flow of at least 5 CFM of argon purge gas is necessary to prevent blind side oxidation, so welding TI is not much different, just considerably pickier.
As long as you are reriveting the cans, it might be wise to rethink the process -- CF is very prone to vibration induced localized delamination around any drilled holes, especially when hot, so turning an outer ring from stainless with generous filleting on the inside edges to prevent stress risers in the CF , then riveting through it into the original inner ring should provide a more even clamping force to the CF, and should prevent (or at least significantly delay) rivet failure.
Good luck with this.

Rob

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post #6 of 8 Old 09-03-2007, 09:53 AM Thread Starter
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Hey Rob, great idea on the outer ring to give the CF some support. That should help a bunch. Yeah, I was going to purge the stainless anyway to keep the crusties from shwing up. I am hoping this setup I am doing ends up looking good. We will see.

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post #7 of 8 Old 09-03-2007, 12:32 PM
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Magnet

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post #8 of 8 Old 09-03-2007, 01:29 PM Thread Starter
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Neither the TI or the stainless used would be magnetic. I am quite sure it is going to be stainless. We will see once I arc the TIG up on it.

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