0.1 Mm 0.25 Mm 0.3 Mm 0.4 Mm 409 304 Stainless Steel Sheet Metal Plate 2b Finish

Grade 409 Stainless Steel Sheet

400 SERIES STAINLESS STEEL

The 400 series group of stainless steels typically have an 11% chromium and 1% manganese increase, above the 300 series group. This stainless steel series tends to be susceptible to rust and corrosion under some conditions although heat-treating will harden them. The 400 series of stainless steels have a higher carbon content, giving it a martensitic crystalline structure that provides the end product with high-strength and high-wear resistance. The 400 series steels tend to be used in agricultural equipment, gas turbine exhaust silencers, hardware, motor shafts, and more.

Type 409(UNS S40920) is a heat resisting ferritic stainless steel providing good oxidation and corrosion resistance compared to carbon steel. This titanium stabilized grade was developed for automotive exhaust systems but its good formability, weldability, and corrosion resistance has led to its use in other applications. The corrosion resistance of Type 409 is better than coated carbon steel, similar to that of Type 410 stainless steel, and less than that of Type 304/304L stainless steel. Type 409 is not suggested for cosmetic or surface critical applications as light surface rusting can form during exposure to atmospheric conditions.

CHEMICAL COMPOSITION

MECHANICAL PROPERTIES

409 COMMON APPLICATIONS

The typical applications of grade 409 stainless steels are listed below:

• Automotive exhaust tubing
• Catalytic converter systems
• Mufflers