CCPerformance.com
Veteran
Not sure about tensile, but stailess is much more resilant to hot / cold cycleing than mild steel. Even at half the wall thickeness. Hence the reason most HP exhaust systems are SS. Only problem is they don't hold any heat. SS is a much better conductor than mild for heat transfer.
JDKRXW
TY 4 Stroke Junkie
CC, I always thought SS was less resilent to hot / cold CYCLING than mild steel (because it is brittle).
- its heat tolerance (rating) is higher than mild steel though.
- its tensile and shear strength is much higher than mild steel so a given component can be made much lighter than the same mild steel piece.
- it is very corrosion resistant, so no protective coatings are needed.
- its heat tolerance (rating) is higher than mild steel though.
- its tensile and shear strength is much higher than mild steel so a given component can be made much lighter than the same mild steel piece.
- it is very corrosion resistant, so no protective coatings are needed.
CCPerformance.com
Veteran
Perhaps we're saying the same thing. I'm not a metalurgist but due to whatever performance characteristics a thinner wall tube of SS will be similarly strong or stronger than a thicker piece of mild. I agree with the strength, this is why most performance auto and sport bike exhausts are used for this reason. You can achieve the same strength with thinner tube.
As for embrittlement, assuming the weld wasn't contaminated, we have seen no problems in either marine or auto applications.
As for corrosion and protective coatings I have to disagree. The most common SS is going to be some derivative of 314. We see these corrode and turn colors all the time. In either thin or thicker wall configurations. Case in point look at any Harley Buell. Soon as you start the bike the pipe turns every color in the rainbow. Now if your talking 340-400 grade which is double the cost, this is much less likely to corrode. In either case SS wont rust thru like mild, but it looks almost as bad. Look at an RX-1 exhaust or some std GM vehicles with SS.
We coat countless SS headers and manifolds primarily for heat management. SS allows a LOT more heat into teh underhood area, and again it turns clors. A sport bike customer of our's builds SS systesm for there bikes and dyno'd the same pipe with & with out ceramic. The coated pipe picked up 4 HP and looked clean.
Buell riders report a noticanle torque differance when we coat their pipes as well, though we don't have dyno results.
are needed.
As for embrittlement, assuming the weld wasn't contaminated, we have seen no problems in either marine or auto applications.
As for corrosion and protective coatings I have to disagree. The most common SS is going to be some derivative of 314. We see these corrode and turn colors all the time. In either thin or thicker wall configurations. Case in point look at any Harley Buell. Soon as you start the bike the pipe turns every color in the rainbow. Now if your talking 340-400 grade which is double the cost, this is much less likely to corrode. In either case SS wont rust thru like mild, but it looks almost as bad. Look at an RX-1 exhaust or some std GM vehicles with SS.
We coat countless SS headers and manifolds primarily for heat management. SS allows a LOT more heat into teh underhood area, and again it turns clors. A sport bike customer of our's builds SS systesm for there bikes and dyno'd the same pipe with & with out ceramic. The coated pipe picked up 4 HP and looked clean.
Buell riders report a noticanle torque differance when we coat their pipes as well, though we don't have dyno results.
are needed.
tundra
TY 4 Stroke Junkie
for stainless, 316 is really great for corrosion, 316 is use in boat or things that contact chemical or saltwater, the less magnetic he are the better he will be for corrosion.
304 is for common use.
and Stainless keep heat more than mild steel, it's why his so hard to machining. Tensile like you said is better, but is softer and expensive, but the look of a shinny SS is cool
304 is for common use.
and Stainless keep heat more than mild steel, it's why his so hard to machining. Tensile like you said is better, but is softer and expensive, but the look of a shinny SS is cool
