Subject	When dealing with 304 stainless steels, double welding is a
Posted by	Scotts94z32 on October 19, 2004 at 5:03 PM
	This message has been viewed 99 times.
In Reply To	Greg Dupree test pipes review after 1 year of usage posted by HakenTT on October 19, 2004 at 04:06 PM
Message	no... double welding makes them more brittle because of the chromium precipitation of stainless steel. SS321 was 'invented' because of this - it combats the chromium carbide formation from excess welding (heat and heat affected zone). Greg's pipes are welded on the inside then ground smooth to ensure good flow, i.e. non-turbulant. From a previous post by me (yes, copied and pasted): The SS321, especially, and SS347, have additives of titanium and columbium, respectively, to stabilize the carbide formation at elevated temps since they have a higher affinity for carbon than does the chromium. 321 is usually the material of choice over 347 simply b/c of availability, and to echo your comments, these are the materials of choice for headers. SS304 is good, but it does not have the high temperature fatigue resistance that 321 has. BTW, the ebay/RVM pipes are SS304..I DID learn that last time.. :) SS ____________________________________________________________________________________________________ Dad, you are my inspiration, and reason for living. May you find peace in your new place - 9/26/04
Follow Ups	Greg Dupree test pipes review after 1 year of usage - HakenTT 16:06:13 10/19/04 Wasnt there a whole lot of discussion a while ago - ZisLuv 16:17:37 10/19/04 Maybe I am mistaken, but I thought a while ago.... - Merdox 16:36:00 10/19/04 Here is the link I was thinking of. - Merdox 16:55:59 10/19/04 uh oh, drama. (n/m) - red300zxtt 16:33:47 10/19/04 I think he should weld both sides, it seems logical (n/m) - PunkZTT(Phoenix) 16:46:45 10/19/04 He's stated many times why they do what they do. (n/m) - SeedyROM 16:56:26 10/19/04 Cliffnotes: Double-weld, more heat -> more brittle at the - Scotts94z32 17:10:17 10/19/04 Pretty much. Not sure why this keeps coming up. (n/m) - SeedyROM 17:11:09 10/19/04 Agreed - BOOZTD 3 18:01:24 10/19/04 Because they see all the crap on eBay is double welded - KaZ (VaBch) 07:21:53 10/20/04 Few thousand sets + very few problems + free replacement - SeedyROM 17:00:21 10/19/04 I concur (n/m) - Southern_Z [IL] ® 18:01:40 10/19/04 It will cost me time - HakenTT 18:09:47 10/19/04 Can I charge you for all of the time you've wasted - KaZ (VaBch) 07:19:23 10/20/04 When dealing with 304 stainless steels, double welding is a - Scotts94z32 17:03:03 10/19/04 look @ the pictures again, looks like aluminized piping (n/m) - fourZero 19:21:54 10/19/04 True, it may be... hard to tell by the pics, although it - Scotts94z32 12:02:04 10/20/04 Thank you for the post. - tommunist 17:03:43 10/19/04 wow - SeedyROM 17:10:23 10/19/04 2nd, call Greg. He answered every question I had, and a - zgene4 17:19:22 10/19/04 lol to be honest, I've been watchin HakenTT hoping he would - tommunist 17:19:48 10/19/04 Very true - SeedyROM 17:30:16 10/19/04 Oh yeah, don't get me wrong, he's got a ways to go - tommunist 17:40:51 10/19/04 Our sincere apologies........ - Greg D. (Specialty-Z) 17:19:16 10/19/04 this is the way all sponsors should strive to be. (n/m) - jpark74 17:59:33 10/19/04 YOu are great - HakenTT 18:11:25 10/19/04 This is why I'll be upgarading to a FULL exhaust from you - whitepearlz 18:38:41 10/19/04 That happens for trying to save money and cost.. - Antonio(TSP) 18:49:14 10/19/04 Wow...very unclassy! Congratulations on making yourself - Only1Z 18:57:25 10/19/04 That's so blatantly petty..what are you so pissed at? (n/m) - SirpriZ 19:02:03 10/19/04 He tries to sell copies of Greg's pipes, enough said. (n/m) - Spongerider :) 19:14:45 10/19/04 Thanks, that expains the thinly veiled jealousy! (n/m) - SirpriZ 19:25:26 10/19/04 The RVM ones? Cuz let me tell you, THOSE are Quality - KaZ (VaBch) 07:09:46 10/20/04 WOW! Can we say LOSER!!! (n/m) - dilly yo 19:02:37 10/19/04 Clueless. (n/m) - Toso 19:04:16 10/19/04 (Total Hits: 37,828) Hater. :( (n/m) - Spongerider :) 19:06:44 10/19/04 Oh and by the way, I'll STILL be buying Greg's new split - Only1Z 19:10:08 10/19/04 Re: Oh and by the way, I'll STILL be buying Greg's new split - Spongerider :) 19:49:12 10/19/04 haha, I remember that thread. (n/m) - Spee 20:13:53 10/19/04 Oh I read that... - Only1Z 20:58:39 10/19/04 ha..i never saw that post for some reason... - Chris(NJ) 22:40:26 10/19/04 That was a pretty exciting post for TT.net as I recall... - tommunist 02:24:13 10/20/04 Come on... that's weak (n/m) - tommunist 19:13:34 10/19/04 Bookmarked for when you post YOUR products - SeedyROM 19:15:41 10/19/04 lofl (n/m) - JuicycJ4(SWMO) 19:18:00 10/19/04 you're an idiot (n/m) - Spee 19:21:04 10/19/04 You just lost a few customers (n/m) - MikeVar82 19:21:44 10/19/04 Am I the only one who saw the first pictures Antonio took - Iced Z 19:22:07 10/19/04 WOW.. lol... - Antonio(TSP) 19:35:41 10/19/04 And you sure handled that like a winner (n/m) - SeedyROM 19:44:48 10/19/04 Yea then read this post, greg is as nice as can be - Tissan© 19:45:54 10/19/04 looks like you took that the wrong way... - Spee 19:48:53 10/19/04 lame attempt to try and capitalize on an isolated problem (n/m) - fourZero 19:24:09 10/19/04 hi pure-evil (n/m) - Jjzx (next-gear.com) 19:25:52 10/19/04 shhhhhhhhhh don't wake the beast. (n/m) - Halo Z 20:52:06 10/19/04 VTB, i'll make sure never to buy your products. (n/m) - Tissan© 19:32:23 10/19/04 lol, idiot (n/m) - Rage (SoCal) 19:50:06 10/19/04 =X - HalfnHalf702[HAZ] 21:11:31 10/19/04 Aren't you trying to peddle parts here? I think you just - Musashi Sword 21:30:44 10/19/04 He had already done that for the most part - KaZ (VaBch) 07:29:43 10/20/04 bandwagon whipping in the newb. (n/m) - nixit 21:58:26 10/19/04 Aren't bandwagons so gay? (n/m) - Zeorymer 23:47:45 10/19/04 Nice business move... I used to respect you, sorry, no more. (n/m) - Scotts94z32 01:10:40 10/20/04 *sigh* - Toso 19:02:46 10/19/04 It would take me time to get new ones - HakenTT 21:06:34 10/19/04 Is not like you have a job or own a business. You are - AzHeat 21:23:45 10/19/04 don't be using my "assclown" word I pioneered that word for - TWINTURBONICK 03:24:56 10/20/04 Poor baby. - Toso 11:38:54 10/20/04 VTD - fourZero 19:30:56 10/19/04 Let's not VTD. Let's leave it so that everyone can see - Only1Z 19:34:31 10/19/04 Assclown, I did not bash anyone. Read my first post - HakenTT 21:08:02 10/19/04 Don't get me started... - Only1Z 21:25:39 10/19/04 He is an attention whore, plain and simple - KaZ (VaBch) 07:26:59 10/20/04 Damn you're dumb.... I've been trying to keep my mouth - jkperformance 19:53:12 10/19/04 everyone knows that Haken is an idiot. (n/m) - Rage (SoCal) 20:38:23 10/19/04 I think its in the FAQ somewhere (n/m) - Guapo 20:40:13 10/19/04 lol (n/m) - aliaZ 21:35:31 10/19/04 I know...i've been trying to be nice, i really have... - jkperformance 20:49:30 10/19/04 To me my $350 ARE speacial you assclown - HakenTT 21:10:55 10/19/04 Hate to break it to ya, but other than to you, and maybe - jkperformance 07:53:05 10/20/04 As for you, I have just about the same to say - UnrulyZ 20:41:49 10/19/04 Ok so you call performance part a pipe... - HakenTT 21:12:56 10/19/04 You are dumb, if you feel they are over-priced why - AzHeat 21:20:50 10/19/04 You will start bitching on TT.net when your engine - HakenTT 22:29:17 10/19/04 Answer the question, why did you buy them if you feel - AzHeat 23:24:27 10/19/04 Out of curiosity if they are not performance parts & are - Iced Z 21:42:29 10/19/04 How can it be abused? - KaZ (VaBch) 07:25:31 10/20/04 Haken is my personal hero. - Red October 22:02:36 10/19/04 Yeah mine too - KaZ (VaBch) 07:23:46 10/20/04 Mine are leaking too exactly like yours. My down pipes too. (n/m) - Zeorymer 23:50:35 10/19/04 I smell something fishy... - SeedyROM 01:30:21 10/20/04 Hey Seedy... - tommunist 02:42:59 10/20/04 same thing for me..weirdness (n/m) - TWINTURBONICK 03:30:26 10/20/04 It's 300zxclub hatin on the northwest, island Canadianz... - tommunist 04:32:22 10/20/04 ditto (n/m) - Spongerider :) 10:12:59 10/20/04 lol (n/m) - TWINTURBONICK 10:25:09 10/20/04 Considering I'll need 5-bolt DPs for my turbo upgrade - Zeorymer 02:53:35 10/20/04 so tell us Hakken.......... - Playboy 02:21:17 10/20/04 lol (n/m) - Snoguitar 02:22:09 10/20/04 LOL! (n/m) - TWINTURBONICK 03:25:17 10/20/04
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