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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.