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-   -   Exhaust Stainless vs Aluminized Steel (http://www.ramforumz.com/showthread.php?t=90074)

Drake371 08-20-2011 01:10 PM

Exhaust Stainless vs Aluminized Steel
 
Which one is recommended?

Stangshcky12 08-20-2011 02:57 PM

Stainless steel generally last longer especially here with the amount of salt they use on the roads in winter, aluminized is cheaper and usually lasts 2-3 years.

ORT 08-20-2011 09:25 PM

Had a few different aluminized mufflers and they all rusted to some extent. My current muffler is stainless and still looks brand new after almost two years

erm 08-20-2011 11:37 PM

Stainless will last longer but if you aren't close to the Gulf Coast or in an area where they deice the roads using corrosive materials, aluminized works just fine.

Drake371 08-21-2011 10:30 AM

looks like i'll spend the extra bucks and get the stainless system.

DOZER 08-21-2011 11:24 AM

Quote:

Originally Posted by Drake371 (Post 595358)
looks like i'll spend the extra bucks and get the stainless system.

I'm going that way too. For the money it's worth probably never having to replace it.

misfit1981 05-15-2013 02:04 PM

I'm in the desert of central CA and its actually proving difficult to find a muffler shop which carries 309 stainless... I move all over the country so I need the protection... Probably going to have to drive quite a ways to find the right shop.

SteelTownStang 01-19-2014 08:09 PM

Definitely stainless steel, but not all stainless steel is created equal:

300 Series—austenitic chromium-nickel alloys
Type 301—highly ductile, for formed products. Also hardens rapidly during mechanical working. Good weldability. Better wear resistance and fatigue strength than 304.
Type 302—same corrosion resistance as 304, with slightly higher strength due to additional carbon.
Type 303—easier machining version of 304 via addition of sulfur and phosphorus. Also referred to as "A1" in accordance with International Organization for Standardization ISO 3506[6].
Type 304—the most common grade; the classic 18/8 stainless steel. Also referred to as "A2" in accordance with International Organization for Standardization ISO 3506[7].
Type 309— better temperature resistance than 304
Type 316—the second most common grade (after 304); for food and surgical stainless steel uses; Alloy addition of molybdenum prevents specific forms of corrosion. Also known as "marine grade" stainless steel due to its increased resistance to chloride corrosion compared to type 304. SS316 is often used for building nuclear reprocessing plants. Most watches that are made of stainless steel are made of this grade. Rolex is an exception in that they use Type 904L. 18/10 stainless often corresponds to this grade.[1] Also referred to as "A4" in accordance with International Organization for Standardization ISO 3506[8].
Type 321— similar to 304 but lower risk of weld decay due to addition of titanium

400 Series—ferritic and martensitic chromium alloys
Type 408—heat-resistant; poor corrosion resistance; 11% chromium, 8% nickel.
Type 409—cheapest type; used for automobile exhausts; ferritic (iron/chromium only).
Type 410—martensitic (high-strength iron/chromium). Wear resistant, but less corrosion resistant.
Type 416— easy to machine due to additional sulfur
Type 420—"Cutlery Grade" martensitic; similar to the Brearley's original "rustless steel". Also known as "surgical steel". Excellent polishability.
Type 430—decorative, e.g., for automotive trim; ferritic. Good formability, but with reduced temperature and corrosion resistance.
Type 440—a higher grade of cutlery steel, with more carbon in it, which allows for much better edge retention when the steel is heat treated properly. It can be hardened to Rockwell 58 hardness, making it one of the hardest stainless steels. Also known as "razor blade steel". Available in three grades 440A, 440B, 440C (more common) and 440F (free machineable).

snrusnak 01-20-2014 10:43 AM

409 SS is great for the price as long as you don't care it looking "burnt" and having mild surface rust.

Aluminized steel can hold up ok but depends on the environment it's used in and remember the welds will need protected as well.


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