What is the difference between 409 stainless and 304 stainless?

304 is an austenitic stainless steel high in chromium and nickel with very high corrosion resistance. It is one of the most commonly produced and used stainless steel grades. 409 is a ferritic stainless steel with less chromium and very little nickel.

Is 409 stainless steel good for exhaust?

409 stainless is a metal designed primarily for the automotive exhaust industry, although it has been used successfully in other industrial applications. It combines good elevated temperature corrosion resistance and medium strength, good formability, and inexpensive overall cost.

Which SS material is best?

304 stainless steel is the most common form of stainless steel used around the world, due to its excellent corrosion resistance and value. It contains between 16 and 24 percent chromium and up to 35 percent nickel, as well as small amounts of carbon and manganese.

What’s the difference between 304 and 409 stainless steel?

This is a premium austenitic alloy. It costs substantially more than 304 versions but resists corrosion in saltwater due to added molybdenum. 304 is the most common commercial grade stainless steel. It is also known as 18/8 to indicate it has (around) 18% chromium and (around) 8% nickel.

Why is 409 stainless steel used in exhaust pipe?

The corrosion resistance of the pipe depends on the content of chromium and nickel found in the alloy. 409 stainless is a metal designed primarily for the automotive exhaust industry, although it has been used successfully in other industrial applications.

Which is better Aluminized steel or 304 stainless steel?

409 vs aluminized steel 409 is more corrosion-prone than 304 stainless steel, but it provides a longer use-life than common OEM aluminized steel exhaust systems. It is the next step up in corrosion protection. Aluminized steel is regular carbon steel that has been hot-dipped into an aluminum alloy.

How long does a 409 stainless steel car last?

It is strong and will last 8-10 years in a moderate climate. 409 stainless steel will rust on the surface. However, this is not a concern for most people because it is hidden under the vehicle. Surface rust can be cleaned with a wire brush.