About ER 347 Tig Wire

ER 347 TIG wire, a stainless steel filler metal, transitions effortlessly to welding 321 and 347 stainless steels. With its enhanced stability against intergranular corrosion, it’s perfect for applications in chemical, petrochemical, and aerospace industries, delivering robust, long-lasting welds with superior corrosion resistance.

ER 347 Tig Wire Chemical Compositions:

  1. Carbon (C): ≤ 0.08%
    • Carbon content is controlled to minimize carbide precipitation, ensuring welds resist sensitization.
  2. Chromium (Cr):0-20.0%
    • Chromium provides corrosion resistance and improves weldability.
  3. Nickel (Ni):0-13.0%
    • Nickel enhances corrosion resistance and improves strength and toughness.
  4. Columbium (Nb): 10xC – 1.10%
    • Columbium aids in stabilizing welds against intergranular corrosion.
  5. Manganese (Mn): ≤ 2.0%
    • Manganese contributes to deoxidation and improves mechanical properties.
  6. Silicon (Si): ≤ 0.75%
    • Silicon improves weld pool fluidity and penetration.
  7. Phosphorus (P): ≤ 0.04%
    • Phosphorus content is minimized to avoid brittleness in welds.
  8. Sulfur (S): ≤ 0.03%
    • Sulfur is kept low to prevent hot cracking during welding.
  9. Iron (Fe): Balance
    • Iron serves as the base element, providing structural integrity to the alloy.

ER 347 Tig Wire’s chemical composition ensures welds with superior corrosion resistance and mechanical properties, suitable for various demanding applications.

ER 347 Tig Wire Physical Properties:

  1. Density: Approximately 7.9 g/cm³
    • Similar to other stainless steels, the density of ER 347 Tig Wire indicates its mass per unit volume.
  2. Melting Point: Typically ranges from 2550-2650°F (1400-1450°C)
    • The melting point signifies the temperature range at which the wire transforms from solid to liquid state.
  3. Tensile Strength: Typically above 75,000 psi
    • ER 347 Tig Wire exhibits strong welds, capable of withstanding high-stress environments.
  4. Yield Strength: Usually higher than 30,000 psi
    • This indicates the stress at which the material begins to deform plastically.
  5. Elongation: Typically between 35-45% in 2 inches
    • ER 347 Tig Wire is ductile, capable of stretching before breaking.
  6. Hardness: Typically within the range of 160-190 HB (Brinell Hardness)
    • This offers resistance to surface wear and ensures durability.

ER 347 Tig Wire’s physical properties contribute to its suitability for various welding applications, ensuring reliable and robust welds.

ER 347 Tig Wire Mechanical Properties:

  1. Tensile Strength:
    • Typically surpassing 75,000 psi, ER 347 Tig Wire displays exceptional strength, making it suitable for demanding applications.
  2. Yield Strength:
    • Generally exceeding 30,000 psi, this denotes the stress at which the wire begins to deform plastically, ensuring structural integrity.
  3. Elongation:
    • Ranging between 35-45% in 2 inches, ER 347 Tig Wire exhibits ductility, allowing it to stretch without fracturing.
  4. Hardness:
    • Typically falling within the range of 160-190 HB (Brinell Hardness), this offers resistance to surface wear and ensures durability.
  5. Flexibility:
    • Demonstrating the wire’s ability to bend without breaking, essential for intricate welding operations and ensuring versatility.
  6. Impact Resistance:
    • Measures the wire’s capability to absorb energy without fracturing when subjected to sudden forces, crucial for withstanding dynamic loads.
  7. Fatigue Resistance:
    • Indicates the wire’s ability to withstand repeated loading and unloading cycles without failure, ensuring long-term reliability in service.

ER 347 Tig Wire’s mechanical properties ensure it produces welds of superior strength and durability, vital for various demanding applications.

ER 347 Tig Wire Applications:

  1. Chemical Industry:
    • Used for welding equipment handling corrosive chemicals due to its superior corrosion resistance.
  2. Aerospace Industry:
    • Ideal for fabricating components requiring high strength and resistance to elevated temperatures.
  3. Petrochemical Industry:
    • Employed in welding pipes, tanks, and vessels exposed to harsh environments.
  4. Food Processing:
    • Suitable for welding equipment in hygiene-sensitive environments due to its corrosion resistance.
  5. Power Generation:
    • Used in fabricating components for boilers and heat exchangers requiring corrosion resistance and high-temperature strength.
  6. Automotive Industry:
    • Applied in exhaust systems and structural components due to its durability and resistance to corrosion.
  7. Marine Industry:
    • Utilized for welding ship components and offshore structures, providing resistance to saltwater corrosion.

ER 347 Tig Wire’s properties make it versatile for various industries requiring strong, corrosion-resistant welds in demanding environments.