What structure is 409 stainless steel?

Alloy 409 is a general purpose, chromium, titanium stabilized, ferritic stainless steel whose primary application is automotive exhaust systems. It contains 11% chromium which is the minimum amount for the formation of the passive surface film which gives stainless steels their corrosion resistance.

What is the microstructure of stainless steel?

The microstructure in the annealed condition consists of ferrite grains in which fine carbides are embedded. Ferritic steels used for machining contain a large amount of manganese sulfides to facilitate free cutting. Martensitic stainless steels respond to heat treatment. Martensite is formed through rapid cooling.

What is the difference between 409 and 304 stainless steel?

304 stainless steel contains a much higher percentage of chromium and nickel. This makes it much more resistant to rust. 409 stainless steel is still more rust-resistant than Mild Steel However, neither type of metal is 100% rust-proof.

What are 4 properties of stainless steel?

What are the properties of stainless steel?

  • Corrosion resistant.
  • High tensile strength.
  • Very durable.
  • Temperature resistant.
  • Easy formability and fabrication.
  • Low-maintenance (long lasting)
  • Attractive appearance.
  • Environmentally friendly (recyclable)

How can I tell if my stainless steel is 409?

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. 304 stainless is the highest quality material used for exhaust parts.

What is the microstructure of steel?

The microstructure is predominantly martensite but also has allotriomorphic ferrite, Widmanst├Ątten ferrite, bainite and pearlite. Notice that the spherical shape of a pearlite colony is obvious in this sample because of the lack of impingment.

What properties does stainless steel have?


  • Properties. The advantageous properties of stainless steels can be seen when compared to standard plain carbon mild steel.
  • Corrosion Resistance.
  • Cryogenic (Low Temperature) Resistance.
  • Work Hardening.
  • Hot Strength.
  • Ductility.
  • High Strength.
  • Magnetic Response.

What properties are in stainless steel?

Stainless steel has different corrosion properties which include being non-corrosive, rust-resistant steel, which is simply designated as stainless steel. In comparison with aluminium, stainless steel is approximately 3 times heavier. Stainless steel, like steel itself, is an alloy.

Is 409 stainless magnetic?

409 Stainless Steel is a stabilized ferritic stainless steel with better oxidation and corrosion resistance than carbon steel. It’s low nickel and high carbon content make it one of the most economical stainless steels available. Like other 400 grade stainless steel, 409 is magnetic.