Anyone Seen a Rusted Out OEM Exhaust System?
01-26-2010, 05:25 PM
#21
On their web page, they say it's made from T-304. I'll take a magnet to it tomorrow.
So what I should ask them is if the filler rod was carbon steel, or stainless, and if stainless, what kind?
Correct?
So what I should ask them is if the filler rod was carbon steel, or stainless, and if stainless, what kind?
Correct?
01-27-2010, 08:07 AM
#22
Many of the custom exhaust systems are primarily 304, so that's not a surprise. It would actually be 304L, which is the low carbon version that is needed to prevent corrosion in the weld zone. Type 304 is nonmagnetic when annealed, but becomes magnetic when it is work hardened (formed). Therefore, it will likely be feebly magnetic.
The patch and the welds will likely be magnetic, which will confirm they used carbon steel filler metal. If it is non-magnetic, then they really did an awesome repair job. Type 300 filler metal is nonmagnetic after welding.
They could have used Type 400 filler rod, but that is very unlikely. That would be magnetic.
The patch and the welds will likely be magnetic, which will confirm they used carbon steel filler metal. If it is non-magnetic, then they really did an awesome repair job. Type 300 filler metal is nonmagnetic after welding.
They could have used Type 400 filler rod, but that is very unlikely. That would be magnetic.
01-27-2010, 08:51 AM
#23
Originally Posted by slalom44,Jan 27 2010, 09:07 AM
Many of the custom exhaust systems are primarily 304, so that's not a surprise. It would actually be 304L, which is the low carbon version that is needed to prevent corrosion in the weld zone. Type 304 is nonmagnetic when annealed, but becomes magnetic when it is work hardened (formed). Therefore, it will likely be feebly magnetic.
The patch and the welds will likely be magnetic, which will confirm they used carbon steel filler metal. If it is non-magnetic, then they really did an awesome repair job. Type 300 filler metal is nonmagnetic after welding.
They could have used Type 400 filler rod, but that is very unlikely. That would be magnetic.
The patch and the welds will likely be magnetic, which will confirm they used carbon steel filler metal. If it is non-magnetic, then they really did an awesome repair job. Type 300 filler metal is nonmagnetic after welding.
They could have used Type 400 filler rod, but that is very unlikely. That would be magnetic.
So, are stainless filler rods much more expensive than regular carbon steel?
Are the techniques to weld the hole I had different with the different filler rods, or pretty much the same.
Can the hole be "rewelded" with stainless, or a stainless patch put over it and welded with stainless filler?
Thanks again.
01-27-2010, 10:36 AM
#25
[QUOTE=davidc1,Jan 27 2010, 12:51 PM]Hey, thanks for your really informative posts.
So, are stainless filler rods much more expensive than regular carbon steel?
Are the techniques to weld the hole I had different with the different filler rods, or pretty much the same.
Can the hole be "rewelded" with stainless, or a stainless patch put over it and
So, are stainless filler rods much more expensive than regular carbon steel?
Are the techniques to weld the hole I had different with the different filler rods, or pretty much the same.
Can the hole be "rewelded" with stainless, or a stainless patch put over it and
01-28-2010, 12:43 AM
#26
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One of the things I was happy to see on my Fujitsubo was that they used backing gas.
Where the end tip is welded on the muffler, you can see the weld at both sides and both look smooth.
A typical through&through weld, protected on the inside with backing gas.
Without backing gas it would look like cauliflour, all burned.
Where the end tip is welded on the muffler, you can see the weld at both sides and both look smooth.
A typical through&through weld, protected on the inside with backing gas.
Without backing gas it would look like cauliflour, all burned.
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