Stainless Steel Plate 409 1.4512

Stainless Steel 409 1.4512

Stainless Steel 409, also referred to as 1.4512, is a versatile stainless steel alloy suitable for various applications in industries ranging from transportation to mining. This data sheet provides detailed information about the chemical composition, mechanical properties, and processing guidelines for Stainless Steel 409, offering valuable insights for engineers and designers.

Chemical Composition

Stainless Steel 409 exhibits the following chemical composition:

Element% Present (in product form)
Carbon (C)0.030
Silicon (Si)1.00
Manganese (Mn)1.00
Phosphorous (P)0.040
Sulfur (S)0.015
Chromium (Cr)10.50 - 12.50
Molybdenum (Mo)6 x (C+N) to 0.65
Iron (Fe)Balance

Mechanical Properties

The mechanical properties of Stainless Steel 409 in the annealed condition are as follows:

PropertyProduct FormThickness (mm) MaxValue
Yield Strength (Rp0.2 N/mm²)Longitudinal-210
Tensile Strength (Rm N/mm²)--380 - 560
Elongation (min. %)A80mm1) <3mm (longitudinal + transverse)-25
 A2) ≥3mm (longitudinal + transverse)-25

Physical Properties

Stainless Steel 409 possesses the following physical properties:

  • Density at 20°C: 7.7 kg/m³
  • Modulus of Elasticity:
    • At 20°C: 220 kN/mm²
    • At 200°C: 210 kN/mm²
    • At 400°C: 195 kN/mm²
  • Specific Thermal Capacity at 20°C: 460 J/kg K
  • Electrical Resistivity at 20°C: 0.60 Ω mm² /m
  • Coefficient of Linear Thermal Expansion (10^-6 K^-1):
    • Between 20°C and 100°C: 10.5
    • 200°C: 11.0
    • 300°C: 11.5
    • 400°C: 12.0
    • 500°C: 12.0


Stainless Steel 409 finds applications in various industries, including:

  1. Rail and Road Vehicles: Components such as exhaust systems and structural parts benefit from Stainless Steel 409's corrosion resistance and strength.

  2. Container Construction: The alloy's durability makes it suitable for containers used in transportation and storage.

  3. Sugar Industry: Warehouse and transportation equipment in the sugar industry rely on Stainless Steel 409 due to its resistance to corrosive environments.

  4. Absorbing Duct: Used in industrial settings, Stainless Steel 409 serves in absorbing duct systems due to its mechanical properties.

  5. Coal Mining: Equipment used in coal mining operations utilizes Stainless Steel 409 for its robustness and corrosion resistance.

Processing and Welding

Stainless Steel 409 can be processed and welded using standard methods, including TIG welding, MAG welding with solid wire, and arc welding. Cold forming is feasible at temperatures above room temperature, although sharp bending parallel to the rolling direction should be avoided. Preheating between 200°C to 400°C may be necessary for thicker plates or extensive deformation. Hot forming at 700°C to 900°C might also be required in certain cases. After welding or scaling, any annealing colors should be removed by pickling, grinding, or sandblasting, using only iron-free tools.

Stainless Steel 409 (1.4512) stands out as a reliable and versatile alloy suitable for various industrial applications. With its robust mechanical properties, excellent corrosion resistance, and ease of processing, Stainless Steel 409 continues to be a preferred choice in diverse sectors.

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