About ER 308 Core Wire

ER 308 core wire is a stainless steel welding wire containing chromium-nickel alloy. It offers excellent corrosion resistance and weldability, commonly used for welding austenitic stainless steels like 304 and 308. Ideal for applications requiring clean, strong welds in various industries.

ER 308 Core Wire Chemical Compositions:

The chemical composition of ER 308 core wire typically includes:

  • Chromium (Cr):0 – 20.0%
  • Nickel (Ni):0 – 10.5%
  • Carbon (C): ≤ 0.08%
  • Manganese (Mn): ≤ 2.5%
  • Silicon (Si): ≤ 1.0%
  • Phosphorus (P): ≤ 0.045%
  • Sulfur (S): ≤ 0.03%
  • Iron (Fe): Balance

This composition ensures excellent weldability and corrosion resistance in stainless steel welding applications.

ER 308 Core Wire Physical Properties:

Physical properties of ER 308 core wire include:

  1. Density: Typically around 7.9 g/cm³, indicating its mass per unit volume.
  2. Melting Point: Approximately 1400-1450°C (2552-2642°F), 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 contribute to its effectiveness in welding, ensuring strong, durable welds with minimal defects.

ER 308 Core Wire Mechanical Properties:

Mechanical properties of ER 308 core wire encompass:

  1. Tensile Strength: Typically between 550-750 MPa, indicating its capacity to withstand pulling forces without breaking.
  2. Yield Strength: Generally 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: Shows good toughness, able to withstand sudden loads without fracturing.
  6. Fatigue Resistance: Exhibits 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 collectively ensure reliable performance in welding operations, particularly in applications requiring corrosion resistance and strength.

ER 308 Core Wire Applications:

ER 308 core wire finds applications in various industries, including:

  1. Food and Beverage Industry: Used for welding equipment and structures due to its corrosion resistance and cleanliness.
  2. Chemical Processing: Employed for welding components in chemical plants due to its resistance to corrosive environments.
  3. Pharmaceutical Industry: Utilized for welding sanitary equipment and piping systems.
  4. Automotive Industry: Used in the fabrication of exhaust systems and other components requiring corrosion resistance.
  5. Construction: Applied in architectural features and structural components where corrosion resistance is essential.
  6. Oil and Gas: Utilized for welding pipelines, tanks, and other equipment subjected to corrosive environments.
  7. Aerospace: Employed for welding components in aircraft structures due to its strength and corrosion resistance.
  8. Marine: Used for welding marine equipment and structures due to its resistance to saltwater corrosion.
  9. Power Generation: Applied in welding components in power plants due to its resistance to high-temperature environments and corrosion.
  10. General Fabrication: Utilized in various fabrication projects requiring clean, strong welds with minimal spatter.