About ER 2209 Tig Wire

ER 2209 TIG wire is a duplex stainless steel filler metal designed for welding similar alloys and duplex stainless steels. It offers high strength, excellent corrosion resistance, and good weldability, making it ideal for applications in the chemical, oil, and gas industries where durability and resistance to stress corrosion are crucial.

ER 2209 Tig Wire Chemical Compositions:

The typical chemical composition of ER 2209 TIG wire is as follows:

  • Carbon (C):03% max
  • Silicon (Si):50% max
  • Manganese (Mn):00-2.00%
  • Nickel (Ni):00-10.00%
  • Chromium (Cr):00-23.50%
  • Molybdenum (Mo):00-3.50%
  • Phosphorus (P):03% max
  • Sulfur (S):02% max
  • Nitrogen (N):10-0.20%

These elements provide ER 2209 with its duplex structure, combining high strength with excellent resistance to stress corrosion cracking and pitting.

ER 2209 Tig Wire Physical Properties:


  • Approximately 7.8 g/cm³
  • Provides a measure of the wire’s mass per unit volume.

Melting Point:

  • About 1390-1440°C (2534-2624°F)
  • Indicates the temperature at which the wire transforms from solid to liquid.

Tensile Strength:

  • Typically 650-750 MPa
  • Reflects the wire’s ability to withstand pulling forces without breaking.

Yield Strength:

  • Around 450-550 MPa
  • Indicates the stress level at which the wire undergoes plastic deformation.


  • Approximately 25-30%
  • Demonstrates the wire’s ability to stretch before breaking.


  • Typically 25-35 HRC (Rockwell Hardness)
  • Reflects the wire’s resistance to indentation or penetration.

These physical properties make ER 2209 TIG wire suitable for various welding applications, especially those requiring high strength and corrosion resistance.

ER 2209 Tig Wire Mechanical Properties:

  1. Tensile Strength:
  • Minimum: 620 MPa
  • Ensures robust weld joints capable of withstanding high tensile forces.
  1. Yield Strength:
  • Minimum: 450 MPa
  • Provides resistance to deformation under load, maintaining structural integrity.
  1. Elongation:
  • Minimum: 25%
  • Allows for flexibility and ductility in the welded material.
  1. Impact Toughness:
  • Minimum: 75 J (Charpy V-notch)
  • Indicates the wire’s ability to absorb energy before fracturing.
  1. Hardness:
  • Minimum: 25 HRC
  • Ensures resistance to deformation and wear in demanding environments.
  1. Corrosion Resistance:
  • Excellent resistance to pitting and crevice corrosion in chloride environments.
  1. Fatigue Strength:
  • Provides durability under cyclic loading conditions, minimizing the risk of fatigue failure.

ER 2209 TIG Wire Application:

  1. Offshore Platforms:
    • Used for welding duplex stainless steel structures in harsh marine environments.
  2. Chemical Processing Plants:
    • Ideal for fabricating equipment and piping systems requiring corrosion resistance.
  3. Oil and Gas Pipelines:
    • Suitable for welding duplex stainless steel pipelines for transporting hydrocarbons.
  4. Pressure Vessels:
    • Provides strength and corrosion resistance for fabrication of pressure vessels.
  5. Desalination Plants:
    • Utilized in welding components for desalination equipment due to its corrosion resistance.
  6. Power Generation:
    • Welding of components in power plants where corrosion resistance and strength are essential.
  7. Food Processing Equipment:
    • Used in the manufacture of equipment requiring resistance to corrosion and sanitation standards.

ER 2209 TIG wire finds application in industries demanding high strength, corrosion resistance, and reliability in challenging environments.