Stainless Steel - Grade 409NiMOD / 1.4512
Description
409NiMOD/1.4512, also known as Stainless Steel 409M, is a ferritic stainless steel that offers excellent resistance to atmospheric corrosion and exhaust gas. This grade is characterized by its high tensile strength and is often used in applications requiring good weldability and oxidation resistance at elevated temperatures.
Chemical Composition
The chemical composition of 409NiMOD is as follows:
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 10.80 - 12.50 |
| Nickel (Ni) | Max 1.5 |
| Carbon (C) | Max 0.03 |
| Silicon (Si) | Max 1.00 |
| Manganese (Mn) | 0.5 - 1.5 |
| Phosphorus (P) | Max 0.040 |
| Sulfur (S) | Max 0.030 |
| Nitrogen (N) | Max 0.03 |
Mechanical Properties
The mechanical properties of 409NiMOD include:
| Property | Value |
|---|---|
| Yield Strength (MPa) | Min 275 |
| Ultimate Tensile Strength (MPa) | Min 450 |
| Elongation (%) | Min 22% |
| Hardness (HRB) | Max 92% |
| Density (kg/m³) | 7.89 |
Thermal & Physical Properties
- Thermal Conductivity: 25.4 W/m•K
- Specific Heat: 0.5 kJ/kg•K
- Melting Point: Approximately 1425 - 1510 °C
- Thermal Expansion: 16.5 µm/m•K
Other Designations
- UNS: S40900
- AISI: 409
- ASTM: A240
- ASME: SA240
Fabrication and Heat Treatment
409NiMOD/1.4512 can be fabricated through various methods, including welding, machining, and forming. It is not hardenable by heat treatment but can be annealed at temperatures between 800 °C to 900 °C for improved corrosion resistance and ductility.
Applications
Common applications of 409NiMOD/1.4512 include:
- Automotive exhaust systems
- Catalytic converters
- Mufflers
- Industrial and architectural applications where mild corrosion resistance is required
Supplied Forms
409NiMOD is typically supplied in the following forms:
- Plates
- Sheets
- Coils
- Chequered plates
Features
- Excellent corrosion resistance
- High-temperature oxidation resistance
- High-temperature oxidation resistance
- Enhanced mechanical properties compared to standard 409 grades
DIN Number
The DIN number for 409NiMOD is 1.4512.
This datasheet provides a comprehensive overview of the 409NiMOD grade, highlighting its properties, applications, and specifications, ensuring it is suitable for various industrial uses.