About ER 308 Mig Wire

ER 308 MIG wire is a solid stainless steel filler metal designed for welding austenitic stainless steels like 304 and 308. It offers excellent corrosion resistance, good weldability, and high ductility, making it suitable for a wide range of applications in various industries requiring robust welds.

ER 308 Mig Wire Chemical Compositions:

The typical chemical composition of ER 308 MIG wire includes:-

  • Carbon (C): 0.08% max
  • Silicon (Si): 0.30-0.65%
  • Manganese (Mn): 1.0-2.5%
  • Phosphorus (P): 0.03% max
  • Sulfur (S): 0.03% max
  • Chromium (Cr): 18.0-21.0%
  • Nickel (Ni): 8.0-11.0%

These elements contribute to the wire’s weldability, corrosion resistance, and mechanical properties, making it suitable for various welding applications.

ER 308 Mig Wire Physical Properties:

  1. Density: Typically around 7.9 g/cm³, providing insight into mass per unit volume.
  2. Melting Point: Approximately 1400-1450°C (2552-2642°F), indicating solid to liquid transformation temperature.
  3. Electrical Conductivity: High, facilitating efficient welding processes.
  4. Thermal Conductivity: Moderate, ensuring effective heat transfer during welding.
  5. Ductility: Exhibits good ductility, allowing for flexibility in welding applications.
  6. Magnetic Properties: Typically non-magnetic in the annealed condition, minimizing magnetic interference.
  7. Corrosion Resistance: Offers excellent resistance to corrosion, maintaining weld integrity in various environments.

ER 308 Mig Wire Mechanical Properties:

  1. Tensile Strength: Typically ranges from 550 to 650 MPa, indicating maximum load capacity before breakage.
  2. Yield Strength: Typically around 380 to 420 MPa, representing stress level for permanent deformation onset.
  3. Elongation: Typically 35% to 45%, demonstrating ability to stretch without breaking.
  4. Hardness: Varies depending on welding conditions and heat treatment.
  5. Impact Toughness: Reflects ability to absorb energy during impact without fracturing.
  6. Fatigue Strength: Indicates resistance to failure under repeated loading.
  7. Microstructure: Typically austenitic, contributing to corrosion resistance and mechanical properties.

ER 308 Mig Wire Applications.

  1. General Fabrication:
    • Used in welding stainless steel components for various industries such as construction and manufacturing.
  2. Food and Beverage Industry:
    • Suitable for welding equipment and machinery in food processing facilities due to its corrosion resistance.
  3. Automotive Industry:
    • Utilized for welding stainless steel parts in automotive manufacturing, including exhaust systems and body panels.
  4. Architectural Metalwork:
    • Applied in the construction of architectural structures and components requiring corrosion-resistant welds with an aesthetic finish.
  5. Pharmaceutical Industry:
    • Used for welding stainless steel components in pharmaceutical manufacturing equipment due to cleanliness requirements and corrosion resistance.
  6. Petrochemical Industry:
    • Applied in the fabrication of equipment for oil and gas processing facilities due to resistance to corrosive environments.
  7. Maintenance and Repair:
    • Used for repairing stainless steel equipment and machinery across various industries, ensuring durability and longevity of welds.

ER 308 Mig wire is versatile and finds application in industries requiring robust welds with excellent corrosion resistance.