Stainless Steel 409
Material Data Sheet
Grade 409 stainless steel is a Ferritic steel that offers good mechanical properties and high-temperature corrosion resistance. It is commonly considered as a chromium stainless steel, with applications in exhaust systems of automobiles and applications that demand weldability.
Grade 409 steels are also available in highly stabilized forms, such as grades S40930, S40920 and S40910. The stability of these grades is provided by the presence of niobium, titanium, or both, in the composition of steels.
Chemical Composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 86.0 |
| Chromium, Cr | 11.13 |
| Manganese, Mn | ≤ 1.0 |
| Silicon, Si | ≤ 1.0 |
| Titanium, Ti | 0.75 |
| Carbon, C | ≤ 0.08 |
| Sulfur, S | ≤ 0.045 |
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.80 g/cc | 0.282 lb/in³ |
| Melting Point | 1425 – 1510 °C | 2597 – 2750 °F |
Mechanical Properties
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength, Ultimate | 448 MPa | 65000 psi |
| Tensile Strength, Yield | 238 MPa | 34500 psi |
| Modulus of Elasticity | 200 GPa | 2900 ksi |
Applications
Stainless Steel 409 is used in the following application areas:
- Automotive exhaust tubing
- Catalytic converter systems
- Mufflers
