 Stainless steel 2.0 headers, Are they actually SS? |
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| nditiz1 |
 Jul 30 2018, 09:41 AM
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#1
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Senior Member  Group: Members Posts: 1,185 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region 
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UPDATE - Yes
So I'm trying to get a better seal on for my headers to heads. I can't weld, yet. So I found a SS welder nearby. Looking at the exhaust tubes through the heat exchanger hole I see surface rust. Are the tubes themselves also SS or just the casing for the heat exchangers? Can I just use regular mild steel welding? (IMG:http://www.914world.com/bbs2/uploads_offsite/farm1.staticflickr.com-18763-1532965349.1.jpg) |
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| mb911 |
Jul 30 2018, 10:19 AM
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#2
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914 Guru Group: Members Posts: 6,837 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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Yes they are stainless.. Stainless rusts as well and depending on alloy will lead into how quickly they rust. 400 series rusts quicker then 300 series and different uses. Those were likely 304 ss
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| nditiz1 |
Jul 30 2018, 11:17 AM
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#3
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Senior Member Group: Members Posts: 1,185 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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Thanks for the quick answer.
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| barefoot |
Jul 30 2018, 12:41 PM
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#4
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Senior Member Group: Members Posts: 1,272 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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QUOTE(mb911 @ Jul 30 2018, 12:19 PM)  Yes they are stainless.. Stainless rusts as well and depending on alloy will lead into how quickly they rust. 400 series rusts quicker then 300 series and different uses. Those were likely 304 ss 400 series SS is magnetic and 300 series SS is non-magnetic. 400 stuff (12% Chrome ,balance mostly iron) is what SS knives are made from and can be heat treated to obtain hardness, rusts easily 300 stuff (18% Chrome, 12% nickel, balance mostly iron) does not respond to heat treatment for hardness, much more rust resistant Note that there about a dozen grades of each with slightly varying minor elements |
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| 914_teener |
Jul 30 2018, 03:46 PM
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#5
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914 Guru Group: Members Posts: 5,197 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
QUOTE(nditiz1 @ Jul 30 2018, 08:41 AM) UPDATE - Yes So I'm trying to get a better seal on for my headers to heads. I can't weld, yet. So I found a SS welder nearby. Looking at the exhaust tubes through the heat exchanger hole I see surface rust. Are the tubes themselves also SS or just the casing for the heat exchangers? Can I just use regular mild steel welding? (IMG:http://www.914world.com/bbs2/uploads_offsite/farm1.staticflickr.com-18763-1532965349.1.jpg) Be careful. Take careful measurements of the centers for the mounting tabs and the tubes on these. I used an old head when my tabs broke off like this. Even then a had to do some manual stress reliving. (Dead blow hammer). The tubes WILL move when you weld them. That is why the welds break....they were lousy to begin with. Weld the tabs on BOTH sides using TIG. BTDT |
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| mb911 |
Jul 30 2018, 07:30 PM
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#6
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914 Guru Group: Members Posts: 6,837 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
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QUOTE(barefoot @ Jul 30 2018, 10:41 AM) QUOTE(mb911 @ Jul 30 2018, 12:19 PM) Yes they are stainless.. Stainless rusts as well and depending on alloy will lead into how quickly they rust. 400 series rusts quicker then 300 series and different uses. Those were likely 304 ss 400 series SS is magnetic and 300 series SS is non-magnetic. 400 stuff (12% Chrome ,balance mostly iron) is what SS knives are made from and can be heat treated to obtain hardness, rusts easily 300 stuff (18% Chrome, 12% nickel, balance mostly iron) does not respond to heat treatment for hardness, much more rust resistant Note that there about a dozen grades of each with slightly varying minor elements Yup I know but didn't want to over complicate the thread.. Below is a sample of my 304 ss heat exchangers.  |
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| Mark Henry |
Jul 30 2018, 08:17 PM
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#7
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Some early SSI's had mild steel muffler flanges, the rest was SS.
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