Up Pipe Stainless Alloy?
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From: Exton, PA
Up Pipe Stainless Alloy?
Anyone know the alloy of our up-pipes off hand? the deeper i get into my engine rebuild (and I'm only at the disassembly stage!!), the more i see costs mounting up, so I'm thinking i'll mock up and tack my bellowed up pipes myself (Bill-style) and ask a buddy here at work, who is about the best welder I've ever seen, tig them for me.
I don't have any stainless wire at home, though and am going to my welding supply place tomorrow for more gas, so figured I'd pick up the wire as well.
I'd guess they're 304 Stainless, but thought maybe someone would know off-hand.
thanks!
I don't have any stainless wire at home, though and am going to my welding supply place tomorrow for more gas, so figured I'd pick up the wire as well.
I'd guess they're 304 Stainless, but thought maybe someone would know off-hand.
thanks!
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From: Exton, PA
well then! I just assumed they were since they're not nearly as rusty as the rest of my exhaust components. they're somewhat corroded, but really in pretty good shape. are they just aluminized or ceramic coated steel, then?
i'll have to dig for Bills old homemade up pipe thread and find the vendor and PN for the bellows themselves. I thought for sure those were stainless, but maybe I was just imagining it.
i'll have to dig for Bills old homemade up pipe thread and find the vendor and PN for the bellows themselves. I thought for sure those were stainless, but maybe I was just imagining it.
Lead Driver
Joined: Oct 2010
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From: Columbus, Oh
well then! I just assumed they were since they're not nearly as rusty as the rest of my exhaust components. they're somewhat corroded, but really in pretty good shape. are they just aluminized or ceramic coated steel, then?
i'll have to dig for Bills old homemade up pipe thread and find the vendor and PN for the bellows themselves. I thought for sure those were stainless, but maybe I was just imagining it.
i'll have to dig for Bills old homemade up pipe thread and find the vendor and PN for the bellows themselves. I thought for sure those were stainless, but maybe I was just imagining it.
Lead Driver
Joined: Oct 2010
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From: Columbus, Oh
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From: Exton, PA
409 makes sense. cheaper than 304, but decent corrosion resistance.
found this little blurb online:
"Readily welded but a pre-heat of 150-260°C is recommended. Grade 409 or Grade 430 electrode or filler rods can be used, but AS 1554.6 pre-qualifies welding of 409 with Grade 309 rods or electrodes. These austenitic fillers result in a more ductile weld.
Post-weld annealing at 760-815°C improves weld ductility.
Post-weld annealing is not required when welding thin sections. Automotive exhaust tubing is typically welded without filler metal (autogenously).
All welding must be carried out with minimum heat input to reduce grain growth effects."
Bill - or anyone else with experience welding your own up pipes - what kind of wire/rod did you use?
looks like i'll go for some 309 wire as its good for welding most stainless alloys (except for 316).
found this little blurb online:
"Readily welded but a pre-heat of 150-260°C is recommended. Grade 409 or Grade 430 electrode or filler rods can be used, but AS 1554.6 pre-qualifies welding of 409 with Grade 309 rods or electrodes. These austenitic fillers result in a more ductile weld.
Post-weld annealing at 760-815°C improves weld ductility.
Post-weld annealing is not required when welding thin sections. Automotive exhaust tubing is typically welded without filler metal (autogenously).
All welding must be carried out with minimum heat input to reduce grain growth effects."
Bill - or anyone else with experience welding your own up pipes - what kind of wire/rod did you use?
looks like i'll go for some 309 wire as its good for welding most stainless alloys (except for 316).
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From: Southern West Virginia
The original pipes that came on the trucks when they were new are 300 series stainless. The stock replacement up pipes that you get from Ford are 400 series stainless. A magnet will not stick to the 300 series, but will stick to 400 series because it is mixed with other metals.
Lead Driver
Joined: Oct 2010
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From: Columbus, Oh
[QUOTE=fordman67;13953841]
No worries. The reason I said they weren't was when I spoke with Bill about making a set, he said the only different between his and some others, were that his weren't stainless. Either I mis heard or he meant the new pieces he scabbed on. Dunno, either way, I was wrong.
That and mine are so funky, I didn't think there was a snowballs chance in hell they were stainless.
That and mine are so funky, I didn't think there was a snowballs chance in hell they were stainless.
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From: Exton, PA
The original pipes that came on the trucks when they were new are 300 series stainless. The stock replacement up pipes that you get from Ford are 400 series stainless. A magnet will not stick to the 300 series, but will stick to 400 series because it is mixed with other metals.
any idea of the alloy of the bellows you bought? whatever the case, you didn't have any trouble welding them up, if I recall. any recollection of which filler rod you used?
Hotshot
Joined: Jan 2012
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From: Southern West Virginia
very interesting, bill. 300 series is generally better quality (my money is still on 304) - almost certainly better than 409. they probably switched to 409 as a cost save. so converting stock pipes to bellowed actually gets you a better product than later replacement pipes.
any idea of the alloy of the bellows you bought? whatever the case, you didn't have any trouble welding them up, if I recall. any recollection of which filler rod you used?
any idea of the alloy of the bellows you bought? whatever the case, you didn't have any trouble welding them up, if I recall. any recollection of which filler rod you used?
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From: Exton, PA
Thanks bill. I'm sure regular wire would be fine, but I guess I'm ****. I picked up a spool of 308l today (they didn't have 309). $20 for some piece of mind that I won't have rusty tacks in my nice mig-welded up pipes.
By the way, if I recall the appearing of your up pipe welds, you're a heck of a mig welder. I jus assumed they were gig welds there!
Any chance you have that of thread of yours handy? I know I saved it, by no sure how to find it on my phone here.
No big deal if not - I'll find it tomorrow on the comp.
By the way, if I recall the appearing of your up pipe welds, you're a heck of a mig welder. I jus assumed they were gig welds there!
Any chance you have that of thread of yours handy? I know I saved it, by no sure how to find it on my phone here.
No big deal if not - I'll find it tomorrow on the comp.
Fleet Mechanic
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I haven't been following this thread, but when saw this I just had to share. It's the first I have seen of heard of this, very interesting.
