409 Stainless Steel Sheet 1.4509 EN10088.2-2014 409L SS Sheet
409 is a cost-effective ferritic stainless steel primarily used in automotive exhaust systems, earning it the common name "muffler grade."
Chemical Composition
Grade
C
Cr
Ni
Ti
409
0.03
10.5~11.7
0.50
8(C+N) min. 0.15~0.50
Key Characteristics
Basic corrosion and oxidation resistance
Composition balanced for optimum formability
Weldable only in thin sections due to fully ferritic structure
Low cost with limited cost variation due to low alloy content
Automotive Applications
Automotive exhaust systems must withstand aggressive conditions including high temperatures at the manifold end, sulphuric acid condensate, and de-icing salt. Despite these severe conditions, the 11% chromium 409 grade has proven reliable for many years. Exhaust components require extensive bending, expanding, and pressing into complex shapes, making the formability of this ferritic steel particularly impressive.
409 Stainless Steel Sheet 1.4509 EN10088.2-2014 409L SS Sheet
409 is a cost-effective ferritic stainless steel primarily used in automotive exhaust systems, earning it the common name "muffler grade."
Chemical Composition
Grade
C
Cr
Ni
Ti
409
0.03
10.5~11.7
0.50
8(C+N) min. 0.15~0.50
Key Characteristics
Basic corrosion and oxidation resistance
Composition balanced for optimum formability
Weldable only in thin sections due to fully ferritic structure
Low cost with limited cost variation due to low alloy content
Automotive Applications
Automotive exhaust systems must withstand aggressive conditions including high temperatures at the manifold end, sulphuric acid condensate, and de-icing salt. Despite these severe conditions, the 11% chromium 409 grade has proven reliable for many years. Exhaust components require extensive bending, expanding, and pressing into complex shapes, making the formability of this ferritic steel particularly impressive.