About ER 310 Sub Arc Wire

ER 310 Sub Arc Wire is a heat-resistant stainless steel welding wire, featuring high chromium and nickel content for superior oxidation resistance at elevated temperatures. It’s commonly used in applications requiring resistance to scaling, such as furnace parts, heat exchangers, and automotive exhaust systems.

ER 310 Sub Arc Wire Chemical Compositions:

ER 310 Sub Arc Wire typically contains the following chemical compositions:

  • Carbon (C): 0.08% max
  • Manganese (Mn): 2.0% max
  • Silicon (Si): 1.50% max
  • Phosphorus (P): 0.045% max
  • Sulphur (S): 0.03% max
  • Chromium (Cr): 24.0-26.0%
  • Nickel (Ni): 19.0-22.0%
  • Molybdenum (Mo): 0.75% max

These elements contribute to its heat resistance and oxidation resistance properties.

ER 310 Sub Arc Wire Physical Properties:

ER 310 Sub Arc Wire possesses the following physical properties:

  1. Density: Typically around 7.9 g/cm³, similar to other stainless steel alloys.
  2. Melting Point: Approximately 1400-1450°C (2550-2640°F), ensuring stability under high-temperature welding conditions.
  3. Electrical Resistivity: Around 0.75 µΩ·m, facilitating efficient electrical conductivity during welding.
  4. Thermal Conductivity: About 14-16 W/m·K, aiding in heat dissipation and maintaining uniform weld temperatures.
  5. Coefficient of Thermal Expansion: Moderate, ensuring minimal distortion and stress in welded components subjected to temperature variations.
  6. Magnetic Properties: Typically non-magnetic in the annealed condition, suitable for applications requiring non-magnetic properties.
  7. Corrosion Resistance: Excellent resistance to oxidation and scaling at high temperatures, making it suitable for use in furnace components and heat exchangers.

ER 310 Sub Arc Wire Mechanical Properties:

ER 310 Sub Arc Wire exhibits the following mechanical properties:

  1. Tensile Strength: Typically between 600-750 MPa, providing excellent strength for welded joints.
  2. Yield Strength: Generally ranging from 300-450 MPa, indicating the stress level at which the material begins to deform plastically.
  3. Elongation: Typically around 35-45%, indicating the extent to which the material can stretch before failure.
  4. Hardness: Often in the range of 170-200 HB (Brinell hardness), reflecting its resistance to indentation or penetration.
  5. Impact Toughness: Good impact resistance, enabling it to withstand sudden loading or shock without fracturing.
  6. Fatigue Strength: Exhibits a high resistance to fatigue failure, suitable for cyclically loaded applications.
  7. Ductility: Demonstrates good ductility, enabling it to deform without fracturing under tensile stress, crucial for forming and shaping processes.

These mechanical properties ensure ER 310 Sub Arc Wire delivers reliable performance in various high-temperature welding applications.

ER 310 Sub Arc Wire Applications:

ER 310 Sub Arc Wire is used in various high-temperature applications, including:

  1. Furnace Components: Fabrication of furnace linings, burner tips, and radiant tubes.
  2. Heat Exchangers: Welding of tubes and plates in heat exchanger assemblies.
  3. Power Generation: Construction of boiler components and turbine parts.
  4. Aerospace: Manufacturing of engine components and exhaust systems.
  5. Chemical Processing: Welding of reactors, piping, and vessels in chemical plants.
  6. Metal Processing: Welding of annealing and tempering equipment.
  7. Oil and Gas: Welding of pipelines and refinery equipment operating at high temperatures.

These applications benefit from ER 310 Sub Arc Wire’s high-temperature strength and oxidation resistance properties.