Stainless steel/titanium exhaust cracking under certain conditions? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Hugo · 05-13-2016, 02:23 AM

Hey guys,

I was just wondering if anyone has heard of stainless steel or titanium cracking under certain conditions?? I was told my a custom exhaust fabricator that in Australia the conditions compared to the US are harsher and will cause headers in particular to crack unless made with mild steel? Anyone with a strong opinion on this?

Thanks!

sqd · 05-13-2016, 03:27 AM

That sounds silly to me, but what do I know, I'm not a fabricator.

What does "certain conditions" mean? What does the US have that Australia doesn't? Snow maybe, but not all states get significant amounts of snow either. If the exhaust is a quality piece, it should hold all year round.

Gringosteve · 05-13-2016, 05:18 PM

Stainless is less ductile than mild steel but would be surprised to hear it cracking. Titanium is even stronger and used in aircraft parts so imagine it would be fine.. Not sure what he means

_____________________________________
www.tuned.org.uk

Spartarus · 05-13-2016, 06:01 PM

It's an opinion, and not a correct one.

mrk1 · 05-13-2016, 09:09 PM

You don't need to worry about cracking with a mild steel exhaust because it will rust out real quick. Mild is cheap, thats about it.

I've always made my exhausts from 304 SS, best combination of durability, workability, and cost. Titanium is cool and all but big bucks.

Mr.ac · 05-13-2016, 09:29 PM

Most titanium exhausts are titanium coated. So.......... Unless it's a $4k+ exhaust I'll believe it. Your typical under $800 exhaust, could be SS with a fancy ti coating.

Also your exhaust guy has been smoking the good stuff. Ask him to share.

All metals under excess heat and pressure will fail. Or shittly welds.

mav1178 · 05-14-2016, 03:58 AM

Quote:

Originally Posted by Hugo

I was told my a custom exhaust fabricator that in Australia the conditions compared to the US are harsher and will cause headers in particular to crack unless made with mild steel? Anyone with a strong opinion on this?

Solution: Move to the US.

-alex

Turdinator · 05-15-2016, 10:41 PM

Quote:

Originally Posted by mrk1

You don't need to worry about cracking with a mild steel exhaust because it will rust out real quick...

Actually with the conditions we have here in Aus a mild steel header if painted or better yet ceramic coated will last longer than most people here will keep there car.

05-13-2016, 02:23 AM	#1
Hugo Member Join Date: Mar 2016 Drives: Toyota 86 Location: Australia Posts: 11 Thanks: 0 Thanked 3 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Stainless steel/titanium exhaust cracking under certain conditions? Hey guys, I was just wondering if anyone has heard of stainless steel or titanium cracking under certain conditions?? I was told my a custom exhaust fabricator that in Australia the conditions compared to the US are harsher and will cause headers in particular to crack unless made with mild steel? Anyone with a strong opinion on this? Thanks!

05-13-2016, 03:27 AM	#2
sqd Senior Member Join Date: May 2015 Drives: '13 SWP GT86 Location: Sweden Posts: 395 Thanks: 178 Thanked 377 Times in 166 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	That sounds silly to me, but what do I know, I'm not a fabricator. What does "certain conditions" mean? What does the US have that Australia doesn't? Snow maybe, but not all states get significant amounts of snow either. If the exhaust is a quality piece, it should hold all year round. __________________ IG @squareddesign http://www.squareddesign.se

05-13-2016, 06:01 PM	#4
Spartarus ...Just add nauseum Join Date: Jan 2015 Drives: 2003 (AP1) S2000 Location: Miami, FL Posts: 545 Thanks: 310 Thanked 784 Times in 335 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	It's an opinion, and not a correct one. __________________ Inline 4 is best 4 There are many ways to displace. -Spartarus

05-13-2016, 09:09 PM	#5
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	You don't need to worry about cracking with a mild steel exhaust because it will rust out real quick. Mild is cheap, thats about it. I've always made my exhausts from 304 SS, best combination of durability, workability, and cost. Titanium is cool and all but big bucks. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

05-13-2016, 09:29 PM	#6
Mr.ac [insert cool phrase here] Join Date: Aug 2015 Drives: BRZ Premium Location: Central Coast CA Posts: 2,369 Thanks: 709 Thanked 1,558 Times in 930 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	Most titanium exhausts are titanium coated. So.......... Unless it's a $4k+ exhaust I'll believe it. Your typical under $800 exhaust, could be SS with a fancy ti coating. Also your exhaust guy has been smoking the good stuff. Ask him to share. All metals under excess heat and pressure will fail. Or shittly welds. __________________ New daily driver - Subaru BRZ Premium Weekend fun/track car - '91 MR2 Turbo Gen3 Old daily driver - '88 MR2 Supercharged

05-13-2016, 05:18 PM	#3
Gringosteve Senior Member Join Date: Nov 2015 Drives: UK Spec GT86 Location: UK Posts: 144 Thanks: 52 Thanked 44 Times in 33 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Stainless is less ductile than mild steel but would be surprised to hear it cracking. Titanium is even stronger and used in aircraft parts so imagine it would be fine.. Not sure what he means _____________________________________ www.tuned.org.uk

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