ER 309 Core Wire

ER 309 core wire is a stainless steel welding wire designed for joining dissimilar metals, including austenitic stainless steels to carbon or low-alloy steels. It offers excellent corrosion resistance and high-temperature strength, making it ideal for applications in elevated temperature environments such as furnace components and boiler tubes.

ER 309 Core Wire Chemical Compositions:

ER 309 core wire typically comprises the following chemical composition:

  • Chromium (Cr):0 – 25.0%
  • Nickel (Ni):0 – 14.0%
  • Carbon (C): ≤ 0.08%
  • Manganese (Mn):0 – 2.5%
  • Silicon (Si): ≤ 1.0%
  • Phosphorus (P): ≤ 0.045%
  • Sulfur (S): ≤ 0.03%
  • Molybdenum (Mo): ≤ 0.75%
  • Iron (Fe): Balance

This composition provides ER 309 core wire with excellent weldability and resistance to corrosion in various environments.

Physical Properties:

ER 309 core wire exhibits specific physical properties essential for welding applications:

  1. Density: Typically around 7.9 g/cm³, determining its mass per unit volume.
  2. Melting Point: Approximately 1400-1450°C (2552-2642°F), indicating its transition to liquid form under heat.
  3. Tensile Strength: Generally 550-750 MPa, its resistance to breaking under tension.
  4. Yield Strength: Typically 250-350 MPa, indicating the stress at which it deforms plastically.
  5. Elongation: Usually 30-40%, indicating its ability to stretch without fracturing.
  6. Hardness: Typically 150-200 HV, determining its resistance to indentation.
  7. Thermal Conductivity: Approximately 15-20 W/m·K, indicating its ability to conduct heat.
  8. Electrical Resistivity: Around 70-80 µΩ·cm, its resistance to electric current flow.

These properties ensure ER 309 core wire’s suitability for various welding applications, offering clean, strong welds with minimal defects.

Mechanical Properties:

ER 309 core wire typically demonstrates the following mechanical properties:

  1. Tensile Strength: Generally between 550-750 MPa, indicating its capacity to withstand pulling forces without breaking.
  2. Yield Strength: Typically around 250-350 MPa, indicating the stress at which it begins to deform plastically.
  3. Elongation: Typically 30-40%, indicating its ability to stretch without fracturing.
  4. Hardness: Typically in the range of 150-200 HV, determining its resistance to indentation or scratching.
  5. Impact Strength: Exhibits good toughness, able to withstand sudden loads without fracturing.
  6. Fatigue Resistance: Shows resistance to failure under cyclic loading conditions.
  7. Ductility: Demonstrates sufficient ductility to undergo deformation without fracture under tensile stress.
  8. Weldability: Offers excellent weldability with minimal risk of cracking or defects.
  9. Corrosion Resistance: Resistant to corrosion, especially in environments containing chlorides or sulfides.

These properties ensure the ER 309 core wire’s reliability and effectiveness in welding operations.

ER 309 Core Wire Applications:

ER 309 core wire finds applications across various industries, including:

  1. Petrochemical Industry: Used for welding components in refineries, pipelines, and storage tanks due to its resistance to high temperatures and corrosive environments.
  2. Power Generation: Employed for welding boiler tubes, furnace components, and turbine parts in power plants.
  3. Chemical Processing: Utilized for welding equipment and piping systems handling corrosive chemicals.
  4. Food and Beverage Industry: Used for welding equipment and structures requiring resistance to corrosion and high temperatures.
  5. Aerospace: Applied in welding components of aircraft engines and structures where high-temperature strength is crucial.
  6. Automotive: Used for welding exhaust systems and other components exposed to elevated temperatures and corrosive environments.
  7. Metal Fabrication: Utilized for welding dissimilar metals, such as stainless steel to carbon steel, in various fabrication projects.
  8. Marine: Employed for welding marine equipment and structures subjected to saltwater corrosion and high temperatures.
  9. General Manufacturing: Used in various manufacturing processes requiring corrosion-resistant and high-temperature materials.

Ambica Steels India Limited is a trusted manufacturer of stainless steel wires, specializing in ER 309 core wire, known for its superior strength, corrosion resistance, and high-temperature performance. If you’re looking for top-quality ER 309 core wire, our experts are ready to assist with your inquiries and provide tailored solutions. Contact us now!